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
答案是E，想请问D 我觉得BUT前面有逗号，不省略主语THEY是不是更好呢？ 另外， A majority of the international journalists
surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future.请问这个surveyed怎么理解呢？谓语动词应该是VIEW吧，谢谢了 | 
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发表于 2006-8-3 20:22:00
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