问题补充:
-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:
A. has to
(答案→)B. used to
C. tried to
D. happened to
解析:A. has to 不得不 B. used to过去常常 C. tried to 尽力 D. happened to碰巧发生;句意:打扰了,请问史密斯先生的儿子住在这里吗?他过去住在这里,但是已经搬走了。故选B