题干

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
上一题 下一题 0.64难度 单项选择 更新时间:2014-01-10 08:57:23

答案(点此获取答案解析)