SAT Grammar Questions Answered: Orb-Weaver, Rockfish and 18 More

Pasted an SAT grammar question into Google? Find it below by its first words. Every question on this page shows the passage, the four choices, and the answer right under the choices. A tutor’s explanation follows: why the answer is right, and why each wrong choice is a trap.

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Question banks: October 2026 English question bank

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All 20 are official College Board SAT questions from Standard English Conventions, the grammar and punctuation part of the Reading and Writing section. The six questions students search for most are first: the golden orb-weaver spider, the calico rockfish, Bonnie Buratti, Howardena Pindell, Hegra, and critic Stina Chyn.

Find your question: all 20 answers

Tap the first words of your question to jump to it, or read the answer here.

Question starts with	Answer
To humans, it does not appear that the golden orb-weaver spider uses…	D (prey; rather,)
The life spans of rockfish vary greatly by species. For instance, the…	D (decade, while)
Bonnie Buratti of NASA’s Jet Propulsion Laboratory ______	D (was studying)
In her two major series “Memory Test” and “Autobiography,” painter Howardena Pindell…	A (of)
Hegra is an archaeological site in present-day Saudi Arabia and was the…	A (tombs. Built)
In 1937, Chinese American screen actor Anna May Wong, who had portrayed…	C (critic Stina Chyn claims)
In 2010, archaeologist Noel Hidalgo Tan was visiting the twelfth-century temple of…	D (walls. With)
The Mission 66 initiative, which was approved by Congress in 1956, represented…	C (parks;)
On July 23, 1854, a clipper ship called the Flying Cloud entered…	B (Bay. Having)
Known for her massive photorealistic paintings of African American figures floating or…	D (Rawles)
Eli Eisenberg, a genetics expert at Tel Aviv University in Israel, recently…	D (cephalopods—ocean dwellers that include the squid, the octopus, and the cuttlefish —)
The Arctic-Alpine Botanic Garden in Norway and the Jardim Botânico of Rio…	B (species, both native and nonnative;)
Even though bats prefer very sweet nectar, the plants that attract them…	A (explains)
In 1637, the price of tulips skyrocketed in Amsterdam, with single bulbs…	B (claim)
A model created by biologist Luis Valente predicts that the rate of…	D (will be)
Bengali author Toru Dutt’s A Sheaf Gleaned in French Fields (1876), a…	A (has enhanced)
Scientists believe that, unlike most other species of barnacle, turtle barnacles (Chelonibia…	B (themselves)
The Progressive Era in the United States witnessed the rise of numerous…	A (was)
Cheng Dang and her colleagues at the University of Washington recently ran…	B (grains’ physical properties)
In his groundbreaking book Bengali Harlem and the Lost Histories of South…	C (stories of the South Asian immigrants)

How we checked the answers. We matched every question, word for word, to College Board’s SAT Suite Question Bank and used the answer College Board gives there (checked September 29, 2026). Four of the questions also appear in College Board’s printable SAT Practice Test 4, and their answers match College Board’s Practice Test 4 answer explanations. This page began as our Practice Test 4 grammar walkthrough. We could not confirm the Bluebook question numbers for the other questions, so we list every question by its first words instead of a number.

To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its ______ (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) prey, rather,
2. B) prey rather,
3. C) prey, rather;
4. D) prey; rather,

Answer: D) prey; rather,
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark before rather	Mark after rather	What that does
A	, comma	, comma	a pause is holding two whole sentences
B	no mark	, comma	nothing at all is holding two whole sentences
C	, comma	; semicolon	the stop lands one word too late
D	; semicolon	, comma	full stop at the join, pause after the transition

To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its prey   rather, the brightly colored arachnid seems to wait conspicuously in the center of its large circular web for insects to approach. Researcher Po Peng of the University of Melbourne has explained that the spider’s distinctive coloration may in fact be part of its appeal.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red word is a transition, not a joining word. It belongs to the sentence behind it, the way however and therefore do. That means the real boundary sits in front of it, at the yellow spot.

Why D is right.
Run The Punctuation Ladder and you can already see that three choices offer only pauses at the join and one offers a full stop. Now check whether a full stop is what the sentence needs. Left side: “To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its prey”. A sentence. Right side, ignoring the transition for a second: “the brightly colored arachnid seems to wait conspicuously in the center of its large circular web for insects to approach”. Also a sentence. Full Stop Between Two Complete Sentences demands a period or a semicolon, and only D supplies one. Then However Is Not a Glue Word handles rather: transition words like however, therefore and rather cannot join two sentences no matter how much they sound like they can. Rather belongs to the second sentence and takes a comma after it, which is exactly what D prints.

A) prey, rather, — comma splice. The transition is fenced neatly with a comma on each side, which looks tidy and is the reason this choice catches so many students. But the mark at the actual join is a comma, and a comma cannot hold two whole sentences.

B) prey rather, — fused sentence. There is no mark at the join at all. “…to capture its prey rather, the brightly colored arachnid seems…” also reads for a moment as though rather modified capture, which it does not.

C) prey, rather; — the stop in the wrong place. This choice does supply a full stop, but it puts it after rather instead of before it. That leaves “To humans…capture its prey, rather” as the first sentence, which ends on a dangling transition, and the join itself is still only a comma.

The move: when a transition word sits at the join, decide the mark that goes in front of it first, as though the transition were not there. Then give the transition its comma.

The life spans of rockfish vary greatly by species. For instance, the colorful calico rockfish (Sebastes… (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) decade: while
2. B) decade. While
3. C) decade; while
4. D) decade, while

Answer: D) decade, while
Checked against College Board’s official answer. College Board rates it Easy.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	: colon	after “decade”	half stop
B	. period	after “decade”	full stop
C	; semicolon	after “decade”	full stop
D	, comma	after “decade”	pause

The life spans of rockfish vary greatly by species. For instance, the colorful calico rockfish (Sebastes dalli) can survive for a little over a decade   while the rougheye rockfish (Sebastes aleutianus) boasts a maximum life span of about two centuries.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red word is the whole item. While is a glue word, and a glue word takes the sentence behind it and turns it into a piece that can no longer stand alone. That is why every hard stop on this list is dead. Now the carve-out, because it is the thing that saves the key. A glue word kills the hard stops. It does not kill the comma. While here means whereas: it stands two fish side by side to contrast their life spans, and a contrast built that way takes the comma. Notice too that all four choices print a mark, so there is no no-mark option to hunt for on this item. Shorten the idea to “glue word, no mark” and you will cross out D, which is the answer.

Why D is right.
Two rules cut this in half before you think about meaning. The Semicolon-Equals-Period Rule: a period and a semicolon do the identical job, and the test can never key two right answers, so choices B and C both die on sight. If Two Choices Do the Same Job, Neither Is Right says the same thing from the other side. That leaves the colon and the comma. Now run Look Right, Not Left. Is what follows the blank a complete sentence? “while the rougheye rockfish boasts a maximum life span of about two centuries” — no. The word while is a glue word, and it locks that clause to the sentence in front of it. A piece that cannot stand alone gets a pause, not a stop. That is the comma. The Punctuation Ladder confirms the shape: two full stops, one half stop, one pause, and only the pause is legal.

A) decade: while — wrong job for a colon. The words to the left of the blank do form a sentence, so this one is not killed by the left side. It is killed by the right. A colon promises a definition, a list, or an explanation of what came before. What actually follows is a glue word starting a contrast, and a colon cannot introduce that.

B) decade. While — fragment. Put a period here and the second half becomes “While the rougheye rockfish boasts a maximum life span of about two centuries.” on its own. That is a fragment. It sets up a contrast and never finishes it.

C) decade; while — fragment, again. A semicolon needs a whole sentence on each side, exactly like a period. The right side is not one. B and C break in the same place, which is your signal that both are wrong.

The move: when a period and a semicolon both appear in the same choice set, cross both out first. Then look only at the words to the right of the blank and ask whether they could stand alone. And when that glue word is while meaning whereas, remember it kills the hard stops but not the comma.

Bonnie Buratti of NASA’s Jet Propulsion Laboratory ______ (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) studies
2. B) has been studying
3. C) will study
4. D) was studying

Answer: D) was studying
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. The words stay close. Only the verb does.

Choice	Time it puts the studying in	Fits “when she made”?	Why
A	now, as a habit	no	the discovery is finished and in the past
B	started in the past, still going	no	nothing says the work continues today
C	still to come	no	you cannot make a discovery during work you have not begun
D	in progress at one past moment	yes	the studying was under way when the discovery happened

Bonnie Buratti of NASA’s Jet Propulsion Laboratory   data about Saturn’s rings collected by the Cassini spacecraft when she made an interesting discovery: the tiny moons embedded between and within Saturn’s rings are shaped by the buildup of ring material on the moons’ surfaces.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → One red word decides the whole item. “Made” is simple past, and the word when ties the yellow spot to that exact moment.

Why D is right.
Tense Follows the Neighbours. Circle every other verb in the sentence and copy the time they are in. The one that matters is “when she made an interesting discovery”. Made is simple past, and the word when pins the blank to that same moment. So you need a form that says the studying was already under way at that point in the past. That is the past progressive, “was studying”. Read it back: she was studying Cassini data, and while she was doing that, she made the discovery. The two actions line up exactly.

A) studies — present tense clash. This says she studies the data as an ongoing habit today, but the discovery it is tied to is finished and in the past. The sentence would be describing two different times and claiming they are the same one.

B) has been studying — wrong shape. The present perfect progressive says the work started earlier and is still going on now. Nothing in the sentence says that, and it still does not match the finished past of made.

C) will study — backwards. The future cannot contain an event that already happened. She cannot make a discovery in the middle of work she has not started.

The move: on any tense item, ignore the choices at first and find the nearest printed verb instead. Copy its time. The word when is the strongest signal on the page that the two verbs share a moment.

In her two major series “Memory Test” and “Autobiography,” painter Howardena Pindell explored themes ______ (Answer: A)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) of
2. B) of,
3. C) of—
4. D) of:

Answer: A) of
Checked against College Board’s official answer. This question is also in College Board’s printable Practice Test 4 (Module 2, question 20). College Board rates it Easy.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	no mark	—	no boundary
B	, comma	after “of”	pause
C	— dash	after “of”	half stop
D	: colon	after “of”	half stop

In her two major series “Memory Test” and “Autobiography,” painter Howardena Pindell explored themes of   healing, self-discovery, and memory by cutting and sewing back together pieces of canvas and inserting personal artifacts, such as postcards, into some of the paintings.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch is a genuine supplement with a comma on each side, and it is there to make you think this sentence likes commas. It does — in that spot. The yellow spot is a completely different place in the grammar.

Why A is right.
Same Words, Different Marks — It’s a Boundaries Question again: every choice is the word of plus a mark, so this is about grammar, not about which version sounds nicest. Now name the grammar. Of is a preposition, and the three nouns behind it — healing, self-discovery, memory — are its objects. A Preposition Never Takes a Mark After It: a preposition and the noun it points at are one unit, and no punctuation may be dropped between them. You would never write “a book of, poems”. Same thing here. Take the choice with nothing at all.

B) of, — the list reflex. Three items are coming, so a comma feels due. But the commas in a list go between the items, and the test has already printed those for you: “healing, self-discovery, and memory”. A fourth comma in front of the first item breaks the preposition off from what it points at.

C) of— — half a pair. A dash here opens an interruption that nothing ever closes, and it also cuts of away from its objects. The passage does show you a properly fenced supplement further along, “, such as postcards,”, with a mark on each side. Compare the two and the difference is obvious.

D) of: — colon after a fragment. The Colon Needs a Full Sentence in Front. Look only at the words to the left of the blank: “In her two major series ‘Memory Test’ and ‘Autobiography,’ painter Howardena Pindell explored themes of”. That trails off mid-phrase. It is not a sentence, so the colon is dead before you check anything else.

The move: before you weigh marks, name the two things the blank sits between. If it is a preposition and its object, or a subject and its verb, the answer is no mark and you are done in ten seconds.

Hegra is an archaeological site in present-day Saudi Arabia and was the second largest city of… (Answer: A)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) tombs. Built
2. B) tombs, built
3. C) tombs and built
4. D) tombs built

Answer: A) tombs. Built
Checked against College Board’s official answer. College Board rates it Hard.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	. period	after “tombs”	full stop
B	, comma	after “tombs”	pause
C	no mark plus and	—	no boundary
D	no mark	—	no boundary

Hegra is an archaeological site in present-day Saudi Arabia and was the second largest city of the Nabataean Kingdom (fourth century BCE to first century CE). Archaeologist Laila Nehmé recently traveled to Hegra to study its ancient tombs   Built into the rocky outcrops of a vast desert, these burial chambers seem to blend seamlessly with nature.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch is a description, not a sentence — it has no subject of its own. But it is glued by a comma to “these burial chambers seem to blend”, which is a sentence. Description plus sentence equals one whole sentence, and that whole thing sits to the right of the blank.

Why A is right.
Read Past the Blank before you decide anything. The words after the blank do not stop at “desert”; they run all the way to “nature”. Now run The Two-Clause Test. Left side: “Archaeologist Laila Nehmé recently traveled to Hegra to study its ancient tombs”. Subject and verb, so a sentence. Right side: “Built into the rocky outcrops of a vast desert, these burial chambers seem to blend seamlessly with nature”. The opening piece describes, and then “these burial chambers seem” supplies a subject and a verb. So the right side is a sentence too. Full Stop Between Two Complete Sentences: only the period does that job here.

B) tombs, built — comma splice. This is the choice most students take, because “tombs, built into the rocky outcrops” sounds like an ordinary description hanging off the word tombs. Read to the full stop and it falls apart: the sentence goes on to say “these burial chambers seem to blend”, which is a second subject and a second verb. A comma cannot hold two sentences.

C) tombs and built — false pairing. The word and promises that two matching things are being joined. It seems to pair “traveled” with “built”, which would mean the archaeologist built the tombs herself. The rest of the sentence then supplies its own subject, “these burial chambers”, and the whole thing collapses.

D) tombs built — fused sentence. No mark at all. “…its ancient tombs built into the rocky outcrops of a vast desert, these burial chambers seem…” runs one sentence straight into the next with nothing to separate them.

The move: when the words after the blank open with an -ed or -ing description, do not stop reading at the next comma. Keep going to the full stop and check whether a subject and a verb turn up. If they do, the right side is a sentence and you need a stop.

In 1937, Chinese American screen actor Anna May Wong, who had portrayed numerous villains and secondary… (Answer: C)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) critic, Stina Chyn, claims
2. B) critic, Stina Chyn, claims,
3. C) critic Stina Chyn claims
4. D) critic Stina Chyn, claims,

Answer: C) critic Stina Chyn claims
Checked against College Board’s official answer. College Board rates it Hard.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	, comma pair	around “Stina Chyn”	two pauses
B	, comma pair plus ,	around the name and after “claims”	three pauses
C	no mark	—	no boundary anywhere
D	, comma plus ,	after “Chyn” and after “claims”	two pauses

In 1937, Chinese American screen actor Anna May Wong, who had portrayed numerous villains and secondary characters but never a heroine, finally got a starring role in Paramount Pictures’ Daughter of Shanghai, a film that   critic Stina Chyn claims “expanded the range of possibilities for Asian images on screen.”

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch is a real supplement, fenced by a comma on each side, and it is there to make commas feel normal in this sentence. The green stretch is a completely different structure: a job label, a name, and the verb that belongs to them.

Why C is right.
Read the finished sentence: “a film that critic Stina Chyn claims ‘expanded the range of possibilities for Asian images on screen.’” Two rules do all the work. Name Tags Get No Commas: the word critic is a job label, not a unique identifier. There are thousands of critics, so the name is needed to say which one, and needed information never gets fenced off by commas. Delete “Stina Chyn” and the sentence loses the point of the whole quotation. Then No Mark Between a Subject and Its Verb: “critic Stina Chyn” is the subject of “claims”, so nothing at all may sit between them, and nothing may sit between claims and the words it introduces either. Every mark on offer here is illegal. Take the choice that has none.

A) critic, Stina Chyn, claims — fenced off information the sentence needs. Commas on both sides of a name say “you could delete this and still know who I mean”. Delete it and you get “a film that critic claims expanded…”, which names no one. The name is essential, so the fence is wrong.

B) critic, Stina Chyn, claims, — the same fence plus a split verb. It carries the error in A and adds a third comma between claims and what is being claimed. A verb and its object are one unit; no mark goes between them.

D) critic Stina Chyn, claims, — subject cut from its verb. This is the most tempting wrong answer, because it drops the fence around the name, which feels like progress. But it puts a comma straight between the subject “critic Stina Chyn” and the verb “claims”, which is the one thing the Digital SAT never allows.

The move: a job label plus a name is one unit and takes no commas. Then check what sits on each side of every mark on offer. If a mark falls between a subject and its verb, or between a verb and its object, the choice is dead.

In 2010, archaeologist Noel Hidalgo Tan was visiting the twelfth-century temple of Angkor Wat in Cambodia… (Answer: D)

I do — watch me work this one

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) walls, with
2. B) walls with
3. C) walls so with
4. D) walls. With

Answer: D) walls. With
Checked against College Board’s official answer. This question is also in College Board’s printable Practice Test 4 (Module 2, question 23). College Board rates it Medium.

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	, comma	after “walls”	pause
B	no mark	—	no boundary
C	no mark plus so	—	no boundary
D	. period	after “walls”	full stop

The Mission 66 initiative, which was approved by Congress in 1956, represented a major investment in the infrastructure of overburdened national ______ (Answer: C)

We do — you make one call, then we finish it together

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) parks and
2. B) parks
3. C) parks;
4. D) parks,

Answer: C) parks;
Checked against College Board’s official answer. College Board rates it Medium.

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	no mark plus and	—	no boundary
B	no mark	—	no boundary
C	; semicolon	after “parks”	full stop
D	, comma	after “parks”	pause

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it

On July 23, 1854, a clipper ship called the Flying Cloud entered San Francisco ______ (Answer: B)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) Bay and having
2. B) Bay. Having
3. C) Bay, having
4. D) Bay having

Answer: B) Bay. Having
Checked against College Board’s official answer. College Board rates it Hard.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	no mark plus and	—	no boundary
B	. period	after “Bay”	full stop
C	, comma	after “Bay”	pause
D	no mark	—	no boundary

On July 23, 1854, a clipper ship called the Flying Cloud entered San Francisco Bay   Having left New York Harbor under the guidance of Captain Josiah Perkins Creesy and his wife, navigator Eleanor Creesy, a mere 89 days and 8 hours earlier, the celebrated ship set a record that would stand for 135 years.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch is long and it holds three commas of its own, which is why students lose track of where the second sentence really starts. It starts at “the celebrated ship”. Everything red in front of that is one big description.

Why B is right.
Read Past the Blank is the whole game on this one. The sentence keeps going for another 30 words after the blank, and the piece that decides it sits right at the end. Run The Two-Clause Test. Left side: “On July 23, 1854, a clipper ship called the Flying Cloud entered San Francisco Bay”. Subject “ship”, verb “entered”. A sentence. Right side: “Having left New York Harbor…a mere 89 days and 8 hours earlier, the celebrated ship set a record that would stand for 135 years”. Strip the long Having description and you are left with “the celebrated ship set a record”. Subject and verb. A sentence. Full Stop Between Two Complete Sentences hands you the period.

A) Bay and having — false pairing, no mark. And claims to join two matching things, so it points “entered” at “having left”. But the second half already owns a subject and a verb of its own, “the celebrated ship set”, so nothing is actually being paired and the two sentences are fused.

C) Bay, having — comma splice. This is the trap, and it is a good one, because “San Francisco Bay, having left New York Harbor” reads smoothly for about ten words. Then “the celebrated ship set a record” arrives with its own subject and verb and the comma is suddenly holding two full sentences together.

D) Bay having — fused sentence. No mark at all between two sentences. It also makes “Bay having” read as though the bay were the thing that left New York Harbor.

The move: a long description packed with its own commas is still just a description. Cross the whole thing out, find the subject and verb underneath, and only then decide what mark the blank needs.

Known for her massive photorealistic paintings of African American figures floating or swimming in pools, Calida Garcia ______ (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) Rawles—
2. B) Rawles:
3. C) Rawles,
4. D) Rawles

Answer: D) Rawles
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark used	Where it lands	Boundary strength
A	— dash	after “Rawles”	half stop
B	: colon	after “Rawles”	half stop
C	, comma	after “Rawles”	pause
D	no mark	—	no boundary

Known for her massive photorealistic paintings of African American figures floating or swimming in pools, Calida Garcia Rawles   was the logical choice to design the book cover for Ta-Nehisi Coates’s The Water Dancer, a novel about an African American man who can travel great distances through water.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it

Note → The blank is not between two ideas. It is sitting inside the subject, right before the verb. The full name is “Calida Garcia Rawles” and the verb is “was”. Nothing else in the sentence matters.

Why D is right.
Same Words, Different Marks — It’s a Boundaries Question fires the moment you see the choice set: every option is the word Rawles and a different mark. So stop reading for meaning. Find the subject and find the verb instead. Cross out the opening description, “Known for her massive photorealistic paintings of African American figures floating or swimming in pools,”, and the sentence reads “Calida Garcia Rawles was the logical choice…”. Subject, then verb, with the blank wedged between them. No Mark Between a Subject and Its Verb is absolute on the Digital SAT: nothing may separate them. Not a comma, not a dash, not a colon. Take the choice with no mark. Run The Punctuation Ladder as a check and it agrees: three choices offer some boundary and only one offers none, and none is what the sentence needs.

A) Rawles— — half a pair. A dash used like this is announcing an interruption, and an interruption has to be closed by a second dash further along. No second dash ever arrives. A lone dash between a name and its verb is never correct.

B) Rawles: — wrong job. A colon says “here comes the explanation of what I just said”. What follows here is simply the verb of the sentence, “was the logical choice”. Nothing is being explained, and the colon has cut the subject off from its own verb. The Colon Needs a Full Sentence in Front kills it on its own: to the left of the colon stands “Calida Garcia Rawles”, a subject still waiting for its verb, not a sentence.

C) Rawles, — the split-the-subject trap. This is the choice most students pick, because after that long opening description a pause feels earned. It is not. The comma after the description is already printed for you, before “Calida”. A second one after “Rawles” would fence off the subject from its verb, and the rule against that has no exceptions.

The move: when all four choices are one word plus a different mark, find the subject and the verb before anything else. If the blank sits between them, the answer is the choice with no mark, every single time.

Eli Eisenberg, a genetics expert at Tel Aviv University in Israel, recently discovered that ______ (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) cephalopods, ocean dwellers that include the squid, the octopus, and the cuttlefish
2. B) cephalopods—ocean dwellers—that include the squid, the octopus, and the cuttlefish,
3. C) cephalopods, ocean dwellers that include: the squid, the octopus, and the cuttlefish,
4. D) cephalopods—ocean dwellers that include the squid, the octopus, and the cuttlefish—

Answer: D) cephalopods—ocean dwellers that include the squid, the octopus, and the cuttlefish —
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Opens the extra information with	Closes it with	Matched pair?
A	, comma	nothing	no — the fence has one post
B	— dash	— dash after “dwellers”	yes, but around the wrong words
C	, comma	, comma before “have”	yes, but with a stray : inside
D	— dash	— dash before “have”	yes, around exactly the right words

Eli Eisenberg, a genetics expert at Tel Aviv University in Israel, recently discovered that cephalopods —ocean dwellers that include the squid, the octopus, and the cuttlefish— have a special genetic ability called RNA editing that confers evolutionary advantages.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch shows you the pattern already working: a comma opens the extra information about Eisenberg and a matching comma closes it. The yellow stretch has to do the same job with dashes, and the green words on either side are the subject and the verb it must not separate.

Why D is right.
Find the bones of the sentence first: “Eisenberg recently discovered that cephalopods have a special genetic ability”. Subject cephalopods, verb have. Everything between them is extra information, and The Supplement Sandwich is the rule: extra information sitting mid-sentence takes matching marks on both sides, or no marks at all. A dash opens it, so a dash must close it, and it must close right before the verb. Choice D does exactly that. The extra information also contains its own commas, in the list “the squid, the octopus, and the cuttlefish”, which is precisely why dashes are used for the outer fence instead of more commas — you can see where the aside ends. No Mark Between a Subject and Its Verb also matters here: the closing dash is not really a separator, it is the second half of a pair, which is the one structure allowed to stand in that position.

A) …the cuttlefish — a fence with one post. A comma opens the aside after cephalopods and nothing ever closes it. The sentence then runs “the cuttlefish have a special genetic ability”, which makes it sound as though the cuttlefish alone has the ability.

B) …ocean dwellers—that include…cuttlefish, — matched marks around the wrong words. The dashes here fence off only “ocean dwellers”, which strands “that include the squid, the octopus, and the cuttlefish” outside the pair with nothing to attach to. It then puts a lone comma right before have, splitting the subject from its verb.

C) …that include: the squid…cuttlefish, — a colon after a fragment. The Colon Needs a Full Sentence in Front. Read only the words to the left of that colon: “cephalopods, ocean dwellers that include”. Not a sentence, so the colon is illegal. The trailing comma before have is a second error on its own.

The move: when a choice drops extra information into the middle of a sentence, ignore the wording and check the fence. Same mark opening, same mark closing, and the closing mark landing exactly where the main sentence picks up again.

The Arctic-Alpine Botanic Garden in Norway and the Jardim Botânico of Rio de Janeiro in Brazil… (Answer: B)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) species, both native and nonnative,
2. B) species, both native and nonnative;
3. C) species; both native and nonnative,
4. D) species both native and nonnative,

Answer: B) species, both native and nonnative;
Checked against College Board’s official answer. This question is also in College Board’s printable Practice Test 4 (Module 1, question 25). College Board rates it Hard.

Show the full explanation

What actually changes. Only the marks move. Here is the whole difference, mark by mark.

Choice	Mark before the extra information	Mark at the item joint	Matches the printed list?
A	, comma	, comma	no — the printed joint is a semicolon
B	, comma	; semicolon	yes
C	; semicolon	, comma	no — the two marks are swapped
D	no mark	, comma	no — and the extra information is unfenced

The Arctic-Alpine Botanic Garden in Norway and the Jardim Botânico of Rio de Janeiro in Brazil are two of many botanical gardens around the world dedicated to growing diverse plant species, both native and nonnative; fostering scientific research; and educating the public about plant conservation.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → Three green stretches are the three things these gardens are dedicated to. The red stretch is extra information hanging off the first one. The printed semicolon before “and educating” is already on the page — the test is telling you which mark separates the items.

Why B is right.
Find the list first. These gardens are dedicated to three things: growing diverse plant species, fostering scientific research, and educating the public about plant conservation. Now look at what the test has already printed for you, right before the last item: a semicolon in “research; and educating”. Semicolons Sort a Messy List explains why. When one item in a list already carries a comma of its own, the joints between items get promoted from commas to semicolons so a reader can tell the two jobs apart. Item one carries the comma, because “both native and nonnative” is extra information hanging off “species”. So the blank needs a comma to open that extra information and a semicolon to close item one. That is B, and it is the only choice that copies the marks the passage already shows you. The Punctuation Ladder is a useful cross-check: the joint between two list items needs to be stronger than the mark inside an item, and a semicolon outranks a comma.

A) …nonnative, — the joint is too weak. Using a comma at the item joint puts it on exactly the same level as the comma inside item one. A reader can no longer tell whether “both native and nonnative” is a description of the species or a fourth thing the gardens do. It also contradicts the semicolon the passage prints later.

C) species; both native and nonnative, — the marks are swapped. This one puts the strong mark inside the item and the weak mark at the joint, which is backwards. It also cuts “both native and nonnative” away from “species”, the noun it describes, and leaves it hanging.

D) species both native and nonnative, — unfenced extra information. With no mark at all, “species both native and nonnative” runs together as one long noun phrase, and the comma at the joint is still too weak for a list whose items carry their own commas.

The move: when part of a list is already printed for you, copy its marks. If the printed joint is a semicolon, every other joint is a semicolon too, and the commas inside an item stay commas.

Even though bats prefer very sweet nectar, the plants that attract them have evolved to produce… (Answer: A)

I do — watch me work this one

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) explains
2. B) explaining
3. C) having explained
4. D) to explain

Answer: A) explains
Checked against College Board’s official answer. College Board rates it Easy.

What actually changes. The words stay close. Only the verb does.

Choice	Form of the verb	Does it carry a time?	Can it be the verb of a sentence?
A	explains — plain present tense	yes, present	yes
B	explaining — an -ing form	no	no
C	having explained — an -ing form	no	no
D	to explain — a to form	no	no

In 1637, the price of tulips skyrocketed in Amsterdam, with single bulbs of rare varieties selling… (Answer: B)

We do — you make one call, then we finish it together

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) claiming
2. B) claim
3. C) having claimed
4. D) to claim

Answer: B) claim
Checked against College Board’s official answer. College Board rates it Easy.

What actually changes. The words stay close. Only the verb does.

Choice	Form of the verb	Does it carry a time?	Can it be the verb of a sentence?
A	claiming — an -ing form	no	no
B	claim — plain present tense	yes, present	yes
C	having claimed — an -ing form	no	no
D	to claim — a to form	no	no

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

A model created by biologist Luis Valente predicts that the rate of speciation—the rate at which… (Answer: D)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) being
2. B) to be
3. C) to have been
4. D) will be

Answer: D) will be
Checked against College Board’s official answer. College Board rates it Hard.

Show the full explanation

What actually changes. The words stay close. Only the verb does.

Choice	Form of the verb	Does it carry a time?	Can it be the verb of a sentence?
A	being — an -ing form	no	no
B	to be — a to form	no	no
C	to have been — a to form	no	no
D	will be — future tense	yes, future	yes

A model created by biologist Luis Valente predicts that the rate of speciation—the rate at which new species form—on an isolated island located approximately 5,000 kilometers from the nearest mainland   triple the rate of speciation on an island only 500 kilometers from the mainland.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → Two red pieces, two different traps. The first is the verb of the outer sentence, and students borrow it. The second is a 15-word pile of description that hides how far the subject is from its verb.

Why D is right.
The word predicts is the verb of the outer sentence, and it belongs to “A model created by biologist Luis Valente”. Everything after that is a second, inner sentence with a subject of its own, and it needs a verb of its own. Find that subject with Find the Real Subject: delete the dash pair “—the rate at which new species form—”, delete the long on an isolated island… description, and you are left with “the rate of speciation ______ triple the rate of speciation on an island only 500 kilometers from the mainland”. Now Every Sentence Needs One Real Verb settles it. Three choices carry no tense at all. Only “will be” does, and the future fits a model that predicts.

A) being — no tense. “The rate of speciation…being triple the rate…” describes a state without ever asserting it. The inner clause after that is left without a verb, so the whole sentence never finishes its own prediction.

B) to be — no tense. This is the choice most students take, because “predicts the rate to be triple” sounds like real English. It would be, if the word that were not printed on the page. Once that is there, what follows must be a full clause with a tensed verb.

C) to have been — no tense, and the wrong direction. It carries the same fault as B and adds a second problem: have been points backwards into the past, while predicts points forwards. A prediction about what already happened is not a prediction.

The move: when you see the word that in the middle of a long sentence, treat everything after it as a separate sentence that needs its own subject and its own tensed verb.

Bengali author Toru Dutt’s A Sheaf Gleaned in French Fields (1876), a volume of English translations of French poems, ______ (Answer: A)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) has enhanced
2. B) are enhancing
3. C) have enhanced
4. D) enhance

Answer: A) has enhanced
Checked against College Board’s official answer. College Board rates it Hard.

Show the full explanation

What actually changes. The words stay close. Only the verb does.

Choice	Number it wants	Time it carries	Subject it would need
A	singular	present perfect	one thing
B	plural	present progressive	more than one thing
C	plural	present perfect	more than one thing
D	plural	plain present	more than one thing

Bengali author Toru Dutt’s A Sheaf Gleaned in French Fields (1876), a volume of English translations of French poems,   scholars’ understanding of the transnational and multilingual contexts in which Dutt lived and worked.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red stretch is fenced by a comma on each side, which is the sign that it can be lifted straight out. Lift it out and the green subject sits right next to the yellow spot.

Why A is right.
Cross Out the Interrupter first. The words “, a volume of English translations of French poems,” are fenced by a comma on each side, which is the test telling you they can be removed without breaking anything. Remove them. Now use Find the Real Subject on what is left: “Bengali author Toru Dutt’s A Sheaf Gleaned in French Fields (1876) ______ scholars’ understanding…”. The subject is the book, and a book is one thing, however many poems are inside it. A singular subject takes a singular verb, and the only singular verb offered is “has enhanced”.

B) are enhancing — plural verb, singular subject. The word poems sits right before the blank and pulls hard, which is precisely why the test put it there. But poems is inside the interrupter, so it cannot be the subject of anything.

C) have enhanced — plural verb, singular subject. Same error as B in a different tense. If the interrupter is removed, nothing plural remains for this verb to agree with.

D) enhance — plural verb, singular subject. The shortest and most tempting of the three, because “translations enhance understanding” is a sentence a person might actually write. It is not the sentence on the page. The subject is the book, not the translations.

The move: a description fenced by commas on both sides is removable by definition. Delete it, then read the subject straight into the blank and count it.

Scientists believe that, unlike most other species of barnacle, turtle barnacles (Chelonibia testudinari) can dissolve the cement-like secretions they use to attach ______ (Answer: B)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) it
2. B) themselves
3. C) them
4. D) itself

Answer: B) themselves
Checked against College Board’s official answer. College Board rates it Easy.

Show the full explanation

What actually changes. Four pronouns, sorted two ways.

Choice	How many?	Same creatures as the doer?	Survives?
A — it	one	plain object pronoun, so no	no
B — themselves	more than one	yes, it is a -self form	yes
C — them	more than one	plain object pronoun, so no	no
D — itself	one	yes, but singular	no

Scientists believe that, unlike most other species of barnacle, turtle barnacles (Chelonibia testudinari) can dissolve the cement-like secretions they use to attach   to a sea turtle shell, enabling the barnacles to move short distances across the shell’s surface.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → Both green pieces point at the same creatures. “They” is the doer of “attach”, and the thing being attached is those same barnacles. The red stretch names a different, singular-sounding noun on purpose.

Why B is right.
Two questions, in this order. First, Point the Pronoun at a Real Noun: who is doing the attaching? The sentence says “the secretions they use to attach”, and they means the turtle barnacles. Then The Antecedent Count Rule: point at that noun and count it. “Turtle barnacles” is plural, so any singular pronoun is dead, and that removes both it and itself at once. Now the second question, and it is the one this item is really about. When the Doer Is Also the Receiver, Use -self: the barnacles are attaching the barnacles, so the doer and the receiver are the same creatures. English marks that with a -self or -selves form. Plural doer, same creatures receiving, gives you themselves.

A) it — wrong number and wrong kind. Singular, so it cannot stand for “turtle barnacles”. Students choose it because “species of barnacle” sounds singular, but that phrase is inside a comparison the sentence has already set aside.

C) them — right number, wrong kind. This is the real trap. Them is plural, so it clears the counting test, but a plain object pronoun means something other than the doer. “The secretions they use to attach them” would mean the barnacles are gluing some different creatures to the shell.

D) itself — right kind, wrong number. It is a -self form, which is the correct shape, but it is singular and the doer is plural. Half right is still wrong.

The move: on a pronoun item, count first and then ask whether the doer and the receiver are the same thing. If they are, only a -self form can be right, and the count tells you which one.

The Progressive Era in the United States witnessed the rise of numerous Black women’s clubs, local… (Answer: A)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) was
2. B) were
3. C) are
4. D) have been

Answer: A) was
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. Number and time, in one word.

Choice	Number it wants	Time it carries	Survives?
A — was	singular	past	yes
B — were	plural	past	no — wrong number
C — are	plural	present	no — wrong number and wrong time
D — have been	plural	present perfect	no — wrong number and wrong time

The Progressive Era in the United States witnessed the rise of numerous Black women’s clubs, local organizations that advocated for racial and gender equality. Among the clubs’ leaders   Josephine St. Pierre Ruffin, founder of the Women’s Era Club of Boston.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → This sentence is built backwards. The subject is the green name, and it sits after the verb. The first red stretch is a preposition phrase pretending to be the subject; the second red word tells you the time.

Why A is right.
Run Find the Real Subject, and be strict about it. Delete every phrase that starts with a preposition: “Among the clubs’ leaders” goes, because among is a preposition and a noun inside a preposition phrase can never be the subject. What is left is “______ Josephine St. Pierre Ruffin, founder of the Women’s Era Club of Boston”. Turn it the right way round and it reads “Josephine St. Pierre Ruffin was among the clubs’ leaders”. One person, so a singular verb. That kills were, are and have been in one stroke. Then Tense Follows the Neighbours confirms it from the other direction: the sentence before this one says the Progressive Era “witnessed” the rise of the clubs, which is past, so a present-tense verb here would jump times for no reason.

B) were — agreeing with the wrong noun. This is the answer most students give. The word leaders is plural and it sits directly in front of the blank, so the ear reaches for a plural verb. But leaders is buried inside “among the clubs’ leaders”, and a preposition phrase never supplies the subject.

C) are — wrong number and wrong time. It carries the same plural error as B and adds a second one. Josephine St. Pierre Ruffin led the Women’s Era Club during the Progressive Era, which the previous sentence has already put in the past.

D) have been — wrong number and wrong time. Plural again, and the present perfect reaches from the past up to now. A finished historical period does not reach up to now.

The move: when a sentence opens with a preposition phrase and the verb comes before the name, flip it round in your head. Say the subject first, then the verb, then check the number and the time.

Cheng Dang and her colleagues at the University of Washington recently ran simulations to determine the extent to which individual snow ______ (Answer: B)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) grain’s physical properties’
2. B) grains’ physical properties
3. C) grains’ physical property’s
4. D) grains physical properties

Answer: B) grains’ physical properties
Checked against College Board’s official answer. College Board rates it Medium.

Show the full explanation

What actually changes. Two words, two decisions, four combinations.

Choice	First word says	Second word says	Survives?
A	one grain, and it owns something	many properties, and they own something	no
B	many grains, and they own something	many properties, owning nothing	yes
C	many grains, and they own something	one property, and it owns something	no
D	many grains, owning nothing	many properties, owning nothing	no

Cheng Dang and her colleagues at the University of Washington recently ran simulations to determine the extent to which individual snow grains’ physical properties affect the amount of light reflecting off a snowy surface.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The yellow verb is the free clue nobody uses. “Affect” with no s on the end is a plural verb, so whatever sits in front of it has to be plural too. The red word individual pulls you towards a single grain, which is exactly what it is for.

Why B is right.
Apostrophe Answers Two Questions, and you ask them one word at a time. Word one, grain: how many? The verb at the end of the sentence is affect, with no s, which is the plural form, so more than one grain. Does it own something? Yes — the properties belong to the grains. Many owners with a plural already ending in s take the apostrophe after the s: grains’. Word two, properties: how many? Plural, matching affect. Does it own anything? No. The properties are the things doing the affecting; nothing belongs to them. So no apostrophe at all. Now check with Match the Owner, Then the Thing: expand it and you get “the physical properties of individual snow grains”, which is exactly what the sentence means.

A) grain’s physical properties’ — both words wrong. The word individual makes a single grain feel right, and that is the trap. Individual here means “each one separately”, not “only one”. Then properties’ claims the properties own something further along, and nothing follows for them to own.

C) grains’ physical property’s — first word right, second wrong. It gets the many-grains-owning part correct and then breaks the second word twice: it makes the properties singular when the verb affect demands plural, and it gives that single property an apostrophe for something it does not own.

D) grains physical properties — no ownership shown. Both words are plural, which fits the verb, but nothing marks the relationship between them. Without the apostrophe, “snow grains physical properties” is three nouns in a row and the sentence never says whose properties these are.

The move: take each word on its own and ask the two questions in order — how many, then does it own something. Then look for the verb, because a verb ending in s or not ending in s tells you the number for free.

In his groundbreaking book Bengali Harlem and the Lost Histories of South Asian America, Vivek Bald… (Answer: C)

Which choice completes the text so that it conforms to the conventions of Standard English?

1. A) story’s of the South Asian immigrants
2. B) story’s of the South Asian immigrants’
3. C) stories of the South Asian immigrants
4. D) stories’ of the South Asian immigrant’s

Answer: C) stories of the South Asian immigrants
Checked against College Board’s official answer. This question is also in College Board’s printable Practice Test 4 (Module 2, question 19). College Board rates it Easy.

Show the full explanation

What actually changes. Two words again, and this time the answer is no apostrophe anywhere.

Choice	First word says	Last word says	Survives?
A	one story, and it owns something	many immigrants, owning nothing	no
B	one story, and it owns something	many immigrants, and they own something	no
C	many stories, owning nothing	many immigrants, owning nothing	yes
D	many stories, and they own something	one immigrant, and it owns something	no

In his groundbreaking book Bengali Harlem and the Lost Histories of South Asian America, Vivek Bald uses newspaper articles, census records, ships’ logs, and memoirs to tell the stories of the South Asian immigrants who made New York City their home in the early twentieth century.

yellow, dotted = the spot the question turns on · green, solid = the evidence that decides it · red, dashed = what pulls you to a wrong choice

Note → The red phrase is a real possessive, printed by the test a few words earlier: logs belonging to ships. It is there to keep apostrophes on your mind. The yellow word is the one that makes every apostrophe in the choices unnecessary.

Why C is right.
Apostrophe Answers Two Questions, word by word. Story: how many? The book is built from articles, census records, ships’ logs and memoirs about a whole community, and the sentence ends “who made New York City their home”. Their is plural, so the immigrants are plural and so are the stories. Does stories own anything? No. Nothing belongs to the stories. Immigrants: how many? Plural, for the same reason. Does it own anything? Also no — and here is the point of the whole item. The little word of is already doing the owning. Match the Owner, Then the Thing makes this visible: “the stories of the immigrants” and “the immigrants’ stories” mean the same thing, and you use one method or the other, never both at once. Since of is printed on the page, no apostrophe is needed anywhere.

A) story’s of the South Asian immigrants — singular, and doubly owned. A whole book of newspaper articles, census records, logs and memoirs does not tell one story. The apostrophe then makes that single story the owner of something, and there is nothing after it to own.

B) story’s of the South Asian immigrants’ — ownership claimed twice. This one puts an apostrophe at both ends of a phrase that already has of in the middle. The word of and an apostrophe do the same job, so using both says the ownership twice and neither one lands.

D) stories’ of the South Asian immigrant’s — right number, wrong marks. The plural stories is correct, but the apostrophe after it claims the stories own something further along. It then shrinks the immigrants to a single person, which contradicts their at the end of the sentence.

The move: when the word of is already printed between the two nouns, the ownership is done. Any apostrophe in the choice is a second attempt at the same job, and you can cut it on sight.

The grammar rules behind these questions

Learn the rule, not the letter. Each rule below decides at least one question on this page.

Rule	When you see	What to do	Questions here
Period or semicolon between two sentences	Both sides of the blank could stand alone	Use a period or a semicolon. A comma alone is a comma splice	In 2010, archaeologist Noel…, Hegra is an archaeological…, On July 23, 1854…, The Mission 66 initiative…
A transition word is not glue	rather, however or therefore sits at the join	Put the period or semicolon before the transition and a comma after it	To humans, it does…
No mark between a subject and its verb	The blank splits a subject from its verb	Pick the choice with no punctuation	Known for her massive…
No mark after of	The blank sits between a word like of and what follows it	Pick the choice with no punctuation	In her two major…
Comma before a contrast word like while	A full sentence is followed by while and a contrast	Put a comma before while	The life spans of…
No comma between a title and a name	A title like critic sits right before a name	No comma between the title and the name, or between claims and a quote that flows into the sentence	In 1937, Chinese American…
Extra information gets matching marks	Extra detail sits in the middle of a sentence	Use the same mark on both sides of it, such as two dashes	Eli Eisenberg, a genetics…
Semicolons sort a messy list	A list item already has its own comma	Separate the list items with semicolons	The Arctic-Alpine Botanic Garden…
Every sentence needs one real verb	The choices are one full verb and three -ing or to forms	If the sentence has no main verb yet, pick the full verb	Even though bats prefer…, In 1637, the price…, A model created by…
Find the real subject	The choices are singular and plural forms of one verb	Cross out extra phrases, then match the verb to the subject	Bengali author Toru Dutt’s…, The Progressive Era in…
Tense follows the verbs around it	The choices are one verb in four tenses	Match the time of the nearest verbs in the passage	Bonnie Buratti of NASA’s…
Count the owners before the apostrophe	The choices differ only in apostrophes and s	Decide plural or possessive first, then place the apostrophe	Cheng Dang and her…, In his groundbreaking book…
Match the pronoun to its noun	The choices are pronouns like itself / themselves	Find the noun it points to and match the number	Scientists believe that, unlike…

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We only post an answer when we can check it against an official College Board answer. If your question is not here, use the rule table above: name the rule first, then test each choice against it. You can also practice one rule at a time in our free grammar lesson notes (a free account is needed to open them): Verbs, Pronouns and Apostrophes, Modifiers, The Colon and Joining Two Complete Sentences. For mixed practice, open the free Standard English Conventions lesson notes.

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How we built this page: questions, passages and answer choices are College Board’s. Every answer was checked on September 29, 2026 against College Board’s SAT Suite Question Bank, and against the printable Practice Test 4 answer explanations where the question also appears there. The explanations, rule names and tips are The Test Advantage’s own work.

Frequently Asked Questions

What is the answer to "To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its ______"?

D: prey; rather, (semicolon before rather, comma after). Both sides are full sentences, so the join needs a semicolon, and the transition rather takes a comma after it. College Board's official answer is D.

What is the answer to the calico rockfish SAT question ("can survive for a little over a ______")?

D: decade, while. A comma separates the main clause from the while clause that adds a contrast about the rougheye rockfish. College Board's official answer is D.

What is the answer to the Bonnie Buratti SAT question?

D: was studying. The past progressive matches the other past tense verbs in the passage and shows an action in progress when she made her discovery. College Board's official answer is D.

What is the answer to "painter Howardena Pindell explored themes ______ healing, self-discovery, and memory"?

A: of (no punctuation). Nothing goes between the word of and the list that follows it. College Board's official answer is A.

What is the answer to the Hegra SAT grammar question?

A: tombs. Built (a period). The words before and after the blank are two full sentences, so they need a period. College Board's official answer is A.

What is the answer to the Anna May Wong question ("critic Stina Chyn claims")?

C: critic Stina Chyn claims, with no commas. No comma goes between a title like critic and the name, or between claims and the quote that flows into the sentence. College Board's official answer is C.

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