题目内容

【题目】— Why didn’t you try your best to get on the subway?

— I tried to, but it started moving ______ I could get on it.

A. before B. after C. since D. if

【答案】A

【解析】试题句意:为什么你不尽力上地铁?我试了,但是在我能上之前他就开动了。A. before……之前B. after……之后C. since 自从 .D. if如果。根据句意,故选A.

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