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A
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Difficulty:
15%
(low)
Question Stats:
76% (00:59) correct
24%
(01:15)
wrong
based on 812
sessions
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The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.
(A) humans are known to have forced to extinction
(B) humans are known as having forced to become extinct
(C) humans are known for forcing to become extinct
(D) are known that humans are forced to become extinct
(E) are known as having been forced to extinction by humans
(A) humans are known to have forced to extinction
(B) humans are known as having forced to become extinct
(C) humans are known for forcing to become extinct
(D) are known that humans are forced to become extinct
(E) are known as having been forced to extinction by humans
04 Dec 2013, 00:05
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NOTES
1. Subject-verb agreement.
"The number of X..." is singular
"A number of X.." is plural.
2. Correct idioms:
Known AS
Known TO
3. Wrong idiom:
Known for Verb-ing.
APPLY TO THE QUESTION.
The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.
A) humans are known to have forced to extinction
Correct.
B) humans are known as having forced to become extinct
Wrong."forced to extinction" is clearer, more concise than "forced to become extinct"
C) humans are known for forcing to become extinct
Wrong. "known for forcing" is not idiomatic.
D) are known that humans are forced to become extinct
Wrong. "the number of.." is singular --> "are" is wrong.
E) are known as having been forced to extinction by humans
Wrong. "the number of.." is singular --> "are" is wrong.
Hope it helps.
1. Subject-verb agreement.
"The number of X..." is singular
"A number of X.." is plural.
2. Correct idioms:
Known AS
Known TO
3. Wrong idiom:
Known for Verb-ing.
APPLY TO THE QUESTION.
The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.
A) humans are known to have forced to extinction
Correct.
B) humans are known as having forced to become extinct
Wrong."forced to extinction" is clearer, more concise than "forced to become extinct"
C) humans are known for forcing to become extinct
Wrong. "known for forcing" is not idiomatic.
D) are known that humans are forced to become extinct
Wrong. "the number of.." is singular --> "are" is wrong.
E) are known as having been forced to extinction by humans
Wrong. "the number of.." is singular --> "are" is wrong.
Hope it helps.
General Discussion
