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
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－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：B