问题描述：
求音乐：情态动词+have been 表推测 反义疑问句
如：He must have been there,__________?
He must have been there last night,_______?
He must have been taken away last night,_________?
什么情况下填 wasn't he
如：He must have been there,__________?
He must have been there last night,_______?
He must have been taken away last night,_________?
什么情况下填 wasn't he
问题解答：
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