I had to wait for half an hour before he ______ see me.A、canB、mayC、mightD、cou

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问题 I had to wait for half an hour before he ______ see me.

选项 A、can
B、may
C、might
D、could

答案 D

解析 have to(must)...before...can...“必须……才”，是一个句型。此句是过去时，所以用could。might“也许”，口气太弱，与句义不符。

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