问题 选择题

By the time they arrived at the station, the train         .

A.will leave

B.would leave

C.has left

D.had left

答案

答案:D

题目分析:句意:到他们到达火车站是,火车已经离开了。根据By the time they arrived at the station,可知到达这个动作发生在过去,火车离开是在他们到达之前,故用过去完成时。故选D。

选择题
名词解释