The train is to start soon and Mary hasn’t turned up. What _____ have happened to her?
A.canB.mightC.mayD.should
A

試題分析:考查情態(tài)動(dòng)詞表示推測(cè)。Can have done可能做了某事;might/may have done也許做了某事;should have done本不應(yīng)該做某事;句意:火車就要出發(fā)了,Mary仍然沒(méi)有出現(xiàn)。她可能發(fā)生了什么事情呢?根據(jù)句意是對(duì)過(guò)去發(fā)生的事情的推測(cè)。故A正確。
點(diǎn)評(píng):本題考查了其它動(dòng)詞表示推測(cè)的用法。如果是對(duì)過(guò)去發(fā)生的事情進(jìn)行推測(cè),使用“情態(tài)動(dòng)詞+have done”如果是對(duì)現(xiàn)在的情況進(jìn)行推測(cè),使用“情態(tài)動(dòng)詞+動(dòng)詞原形”構(gòu)成。同時(shí)要注意情態(tài)動(dòng)詞表示虛擬語(yǔ)氣的用法。
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