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英语
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---Catherine,I have cleaned the room for you.
---Thanks.You______ it.I could manage it myself.(2005福建)
A.needn’t do
B.needn’t have done
C.mustn’t do
D.shouldn’t have done
为什么选B,不选A?
人气：100 ℃ 时间：2019-10-19 23:21:58
解答
因为房间已被打扫了,所以用现在完成时.
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