题干

It was very kind of you to do the washing-up, but you _____ it.
A.needn’t doB.shouldn’t do
C.mustn’t have doneD.needn’t have done
上一题 下一题 0.65难度 单项选择 更新时间:2013-07-19 04:41:49

答案(点此获取答案解析)