【題目】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】

考查反意疑問句。句意:從他所說的來看,他一定是目擊了上周的那件事,是嗎?根據(jù)前面的時間狀語last week,must have done 表示對過去事實肯定的推測?芍,此處是對過去的反問,陳述部分是肯定,疑問部分用否定。故選B。

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