问题 选择题

-Excuse me, does Mr Smith’s son live here?

-He _________ be here, but he has moved.

A.has to

B.used to

C.tried to

D.happened to

答案

答案:B

used to do sth表示过去常常做某事而现在不做了。根据题意史密斯先生已经搬走了,以前的动作不复存在,故选B.

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