梵星贸易的手机是真的:改成反意疑问句:I think she must have passed the exam.

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I think she must have passed the exam,hasn't she

I think she must have passed the exam,mustn't she ?
这是状语从句,反意疑问要用主句

I think she must have passed the exam,has't she?

I think she must have passed the exam,has't she?

think she must have passed the exam,hasn't she