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08 Nov 2019, 03:11
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (01:14) correct
21%
(01:28)
wrong
based on 914
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People have discovered the principles of solar energy whenever fuel becomes scarce and expensive but will forget them every time a new source of cheap energy is developed.
(A) have discovered the principles of solar energy whenever fuel becomes scarce and expensive but will forget
(B) have discovered the principles of solar energy whenever fuel has become scarce and expensive but they forget
(C) discovered the principles of solar energy every time fuel becomes scarce and expensive, forgetting
(D) discover the principles of solar energy every time fuel became scarce and expensive, but they forget
(E) discover the principles of solar energy whenever fuel becomes scarce and expensive but forget
(A) have discovered the principles of solar energy whenever fuel becomes scarce and expensive but will forget
(B) have discovered the principles of solar energy whenever fuel has become scarce and expensive but they forget
(C) discovered the principles of solar energy every time fuel becomes scarce and expensive, forgetting
(D) discover the principles of solar energy every time fuel became scarce and expensive, but they forget
(E) discover the principles of solar energy whenever fuel becomes scarce and expensive but forget
08 Nov 2019, 04:51
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This is a kind of zero conditional ("whenever" is the conditional marker).in which we use the present tense in both the conditional clause and the main clause. Choice E is the answer.
General Discussion
08 Nov 2019, 05:04
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daagh
Why A is wrong? When we choose E, we change the meaning of sentence. People discover will imply that it is generalised as a true statement for ex: earth moves around sun. But that is not happening, people have discovered solar energy sometime before and are still using it. After some period of time, they will shift to another source of energy. So why is it present tense?
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Why A is wrong? When we choose E, we change the meaning of sentence. People discover will imply that it is generalised as a true statement for ex: earth moves around sun. But that is not happening, people have discovered solar energy sometime before and are still using it. After some period of time, they will shift to another source of energy. So why is it present tense?
Posted from my mobile device
