题目内容
---- Has Sam finished his homework today?
---- I have no idea. He ________ it this morning.
A. did B. has done C. was doing D. had done
【答案】
C
【解析】 略
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题目内容
---- Has Sam finished his homework today?
---- I have no idea. He ________ it this morning.
A. did B. has done C. was doing D. had done
C
【解析】 略