That must have cost you much money,___it?A.mustn't B.haven't

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That must have cost you much money,___it?A.mustn't B.haven't C.needn't D.didn't

选择D,表示推测的话用didn't反问这是固定用法
我去这是语法你俩商量着就给改了
must have done 的结构,前句强调对过去情况的猜测时（一般有过去时间状语）附加部分用 didn’t + 主语.如果前句强调动作的完成,附加部分则用 haven’t (hasn’t ) + 主语.
He must have met her yesterday,didn’t he
You must have been to Beijing,haven’t you
再问：先生您能否就jackyzhang222的说法解释清楚一下，他说的对吗？
再答：这是没有办法的如果你要应付考试的话，你就要应扣每个知识点，因为中国学习语法比外国人还要详细，有些老外在中国甚至教不了语法，没办法，你要应付考试，如果你只是在口语中的话我支持你选哪个都可以，但是如果在考试中，必须按照所谓的标准答案和技巧来答题，否则丢分是你的
再问： You must have seen her yesterday, ___you ? A mustn't B haven't C didn't D don't这道题与上面这道是差不多的咯，多了一个yesterday具体时间就应该选didn't对吗？若没有具体时间就用haven‘t对吗？若有具体时间就用didn't，对吗？能否就"must have done 的结构，前句强调对过去情况的猜测时（一般有过去时间状语）附加部分用 didn’t + 主语。如果前句强调动作的完成，附加部分则用 haven’t (hasn’t ) + 主语"解说详细些!
再答：使用didn't的时候，前面must have done 表作推测。其实我也认为也可以用haven't，强调过去动作完成，但是这里给出的答案是didn't，所以只能这么解释了。这题歧义性很强。两种说法都说得通。另外多注意如果有时间话选didn‘t别辜负了前辈总结的语法。

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