题目内容
【题目】
(2013 浙江诸暨月考)-Are you a volunteer now?
-No, but I __________. I worked for the City Sports Meeting last year.
A. used to
B. used to be
C. used to do
D. was used to
【答案】B
【解析】句意:——你现在是一名志愿者吗?——不是,但我以前是。去年我是城运会的志愿者。不定式的动词为be或have done,省略时保留be和have。
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