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【题目】Judging from what he said, he must have witnessed the incident last week, ______?

A.hasn't heB.didn't heC.mustn't heD.wasn't he

【答案】B

【解析】

考查反意疑问句。句意:从他所说的来看,他一定是目击了上周的那件事,是吗?根据前面的时间状语last week,must have done 表示对过去事实肯定的推测。可知,此处是对过去的反问,陈述部分是肯定,疑问部分用否定。故选B

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