— Has Tom finished his homework?— Sorry, I don't know. He ________ it this morning when I saw him._刷题宝

题干

— Has Tom finished his homework?

— Sorry, I don't know. He ________ it this morning when I saw him.

A：did

B：does

C：has done

D：was doing

上一题下一题 0.0难度选择题更新时间:2017-01-17 05:51:45

答案(点此获取答案解析）

D

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