题目内容
【题目】Mr Dong ______live in the old Walled City . So he knows it very well.
A. used to B. is used to C. has used to D. used as
【答案】A
【解析】句意:董先生过去常常住在古老的 Walled城市,因此他非常熟悉那里。used to do sth 过去常常做某事,be used to do sth被用来做某事;过去常常做某事,用过去时态,C是现在完成时态结构,所以不对,D used as用作,通常是be used as把---当作---用;根据句意故选A
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