--Why are your eyes so red? You ________ well last night.

--Yes, I stayed up late writing a report.

A. mustn’t have slept B. can’t have slept

C. couldn’t sleep D. might not sleep

 

B

【解析】

試題分析：考查情態(tài)動(dòng)詞和虛擬語(yǔ)氣。句意：--你的眼睛為什么很紅？--昨晚你不可能睡得很好。--是的，我熬夜在寫一份報(bào)告。情態(tài)動(dòng)詞+have done表示對(duì)過(guò)去的事情進(jìn)行虛擬，mustn’t不能表推測(cè)，排除A；must一定，表示肯定推測(cè)，否定推測(cè)用can’t；must have done一定已經(jīng)做了某事；can’t have done不可能已經(jīng)做了某事；might not have done可能沒(méi)有做某事；should/shouldn’t have done本應(yīng)該/不應(yīng)該做某事；need/needn’t have done本需要/不必做某事。這里表示否定的推測(cè)，即一定沒(méi)有睡好，故選B。

考點(diǎn)：考查情態(tài)動(dòng)詞和虛擬語(yǔ)氣

 

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Information

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