问题 选择题

They kept trying _________ they must have known it was hopeless.

A.if

B.because

C.when

D.where

答案

答案:C

when 在此的意思不是"当……的时候",而是"尽管"、"虽然"的意思。又如:He walks when he might take a taxi. 尽管他可以坐出租车,但他却走路。

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