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By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.
A.cameB.had comeC.was comingD.would come
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。
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