You look very tired.You____late last night.
问题描述:
You look very tired.You____late last night.
A.needn't sit up B.didn't need to sit up C.shouldnt sit up D.needn't have sat up
坑爹的答案是D
答
you must have stayed up late last night.
在我看来,一个答案都不对.为啥为啥?must have done "肯定是做过什么事"如果表示原本不必这样做, 用shouldn't have done 更好吧呵呵, 参考