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Answer is B for using the plural verb'are' to match the plural thousands of acres and for keeping the correct idiom " of undergoing".
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IMO B:
are in danger of undergoing

Environmentalists associated with the United Nations Environment Programme predict that if the current trends associated with global warming continue, thousands of acres of pristine land [url]is in danger to undergo[/url] potentially irrevocable changes that could alter the planet's ecosystem forever.

(A) is in danger to undergo
(B) are in danger of undergoing
(C) is in danger of undergoing
(D) are in danger to undergo
(E) are in danger for undergoing
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Environmentalists associated with the United Nations Environment Programme predict that if the current trends associated with global warming continue, thousands of acres of pristine land is in danger to undergo potentially irrevocable changes that could alter the planet's ecosystem forever.

Two things to look for:
1. S-V error and
2. meaning

(A) is in danger to undergo
(B) are in danger of undergoing - CORRECT. Plural verb and proper idiom.
(C) is in danger of undergoing
(D) are in danger to undergo
(E) are in danger for undergoing

IMO Answer B.
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Quote:
Environmentalists associated with the United Nations Environment Programme predict that if the current trends associated with global warming continue, thousands of acres of pristine land is in danger to undergo potentially irrevocable changes that could alter the planet's ecosystem forever.

(A) is in danger to undergo
(B) are in danger of undergoing
(C) is in danger of undergoing
(D) are in danger to undergo
(E) are in danger for undergoing

MEANING: They predict that if currents trends continue, [then] thousands of acres [plural] are [plural] in danger of undergoing irrevocable changes.

Ans (B)
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“... thousands of acres ...” is plural —> A,C — out
In danger of (doing) something — idiomatically correct.
—> D, E — out

The correct answer is B

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Environmentalists associated with the United Nations Environment Programme predict that if the current trends associated with global warming continue, thousands of acres of pristine land is in danger to undergo potentially irrevocable changes that could alter the planet's ecosystem forever.

The filter here is between is/are thousands is in danger or are in danger

Should be is rather than are eliminated B, D and E.

In between A and C to undergo Vs undergoing

undergoing is preferred hence IMO C

(A) is in danger to undergo
(B) are in danger of undergoing
(C) is in danger of undergoing
(D) are in danger to undergo
(E) are in danger for undergoing
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Bunuel

Competition Mode Question



Environmentalists associated with the United Nations Environment Programme predict that if the current trends associated with global warming continue, thousands of acres of pristine land is in danger to undergo potentially irrevocable changes that could alter the planet's ecosystem forever.

(A) is in danger to undergo
(B) are in danger of undergoing
(C) is in danger of undergoing
(D) are in danger to undergo
(E) are in danger for undergoing

OFFICIAL EXPLANATION



There are two main problems with the original sentence.

(1) The subject (thousands of acres, which is plural) does not agree with the verb (is, which is singular and should be replaced with the plural are). Some students argue that land is singular, even if it is thousands of acres. While land is singular, the phrase of pristine land is not the subject, but rather a prepositional phrase that describes the subject thousands of acres, which is plural.

(2) in danger to is not idiomatically correct and should instead be in danger of


A. The subject (thousands of acres, which is plural) does not agree with the verb (is, which is singular); in danger to is not idiomatically correct

B. The subject (thousands of acres, which is plural) agrees with the verb (are, which is plural); in danger of is idiomatically correct

C. The subject (thousands of acres, which is plural) does not agree with the verb (is, which is singular)

D. in danger to is not idiomatically correct

E. in danger for is not idiomatically correct
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