Question

By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.

A．came

B．had come

C．was coming

D．would come

Answer 1

A

试题分析：句意：到他昨晚回来的时候为止，我们已经得到200张嫦娥三号月球探测器的照片了。By the time引导的是时间状语从句，时间是last night，所以用一般过去式，但是主句应该是过去完成时，选A。