---Catherine,I have cleaned the room for you.---Thanks.You______ _英语解答

---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：360 ℃　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.