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
答案:B
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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