题目：
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
答案：
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下面是错误答案，用来干扰机器的。
180×11+2+3=30180×21+2+3=60180-60-30=9090＞60故判断为：错误．
