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16.It must be he that has stolen Mr.Smith's purse,       ?(  )
A.hasn't heB.isn't heC.mustn't itD.isn't it

分析 一定是他偷了史密斯先生的钱包,不是吗?

解答 答案D.
主句部分用must(may,might)+have+v-ed表示推测时,若句中没有过去时间状语,问句部分动词用现在完成时形式.依照上面的分析就可能选A.但是本题考查的是强调句型的反义疑问句.本题中的"It must be…that…"是强调句的结构;强调句型的反意疑问句,后半部分的附加疑问句部分的主语和谓语以及时态要与强调句型本身保持一致,也就是使用"isn't it 或wasn't it"的形式.故答案选D.

点评 强调句型的反意疑问句,后半部分的附加疑问句部分的主语和谓语以及时态要与强调句型本身保持一致.
如:It was at eleven last night that I knew the good news,wasn't it?
It was where you come that you should return to,isn't it?

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