Question

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

A．will leave	B．would leave
C．has left	D．had left

Answer 1

D

試題分析：句意：到他們到達(dá)火車(chē)站是，火車(chē)已經(jīng)離開(kāi)了。根據(jù)By the time they arrived at the station,可知到達(dá)這個(gè)動(dòng)作發(fā)生在過(guò)去，火車(chē)離開(kāi)是在他們到達(dá)之前，故用過(guò)去完成時(shí)。故選D。