问题: you must have seen the play last week,_____?
a didn't you
b mustn'tyou
c haven't you
d don't you
解答:
选A。有具体时间last week存在
1.You must like English，don't you？
2.You must be learning English class, aren't you?
3.You must have seen the film Cast Away,haven't you?
4.You must have seen the film last Sunday evening,did't you?
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