You must have seen him off yesterday,A.haven't you B didn't you C.musn't you D needn't you答案选

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Youmusthaveseenhimoffyesterday,A.haven''tyouBdidn''tyouC.musn''tyouDneedn''tyou答案选Youmusthaveseenhimoffy

You must have seen him off yesterday,A.haven't you B didn't you C.musn't you D needn't you答案选
You must have seen him off yesterday,A.haven't you B didn't you C.musn't you D needn't you答案选

You must have seen him off yesterday,A.haven't you B didn't you C.musn't you D needn't you答案选
must + have + done 是对过去情况的推测,当陈述部分没有明确的表示过去的时间状语时,附加疑问要用have的相应形式;当陈述部分有明确的过去时间状语时,附加疑问要用过去时.
You must have lived here for a long time ,haven’t you
You must have seen him yesterday ,didn’t you