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【题目】—Why didn’t you get on the underground?

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

A.beforeB.afterC.sinceD.if

【答案】A

【解析】

句意:——你为什么没能坐上地铁呢?——我尝试了,但是在我登上之前,地铁就开始移动了。

考查从属连词。before意思是“在……以前”,引导时间状语从句;after意思是“在……之后”,引导时间状语从句;since意思是“自从”,引导时间状语从句;if意思是“如果”,引导条件状语从句。根据题意可知没坐上地铁的原因是,在坐上之前,地铁就开走了。所以要用before。故选A

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