题目内容
---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
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题目内容
---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