题目内容
【题目】—Catherine, I have cleaned the room for you.
—Thanks. You______it. I could manage it myself.
A.needn't do B.needn't have done
C.mustn't do D.shouldn't have done
【答案】B
【解析】
试题分析:句意:—凯瑟琳,我已经给你打扫了房间。—谢谢。你本来没有必要打扫的,我自己能够对付。needn’t have done:过去本来没有必要做而做了;shouldn’t have done:过去本来不应该做而做了。故选B
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