题目内容
—Could you tell me ?
—One hour ago.
A.when you clean the room B.when you cleaned the room
C.when do you clean the room D.when did you clean the room
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题目内容
—Could you tell me ?
—One hour ago.
A.when you clean the room B.when you cleaned the room
C.when do you clean the room D.when did you clean the room