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(2013·高考四川卷)—Why are your eyes so red? You________have slept well last night.
—Yeah,I stayed up late writing a report.
A.can’tB.mustn’t
C.needn’tD.won’t
A
选A。题干的意思是:“你的眼睛为什么这么红?你昨晚肯定没有睡好。”“是的,我熬夜写了一篇报告。”can’t have done意为“不可能做过”,表示对过去事情的否定推测。由题中的关键信息stayed up late writing a report“熬夜写报告”可推测昨晚没有睡好,所以选A。mustn’t表示“禁止”,needn’t表示“没必要”,won’t表示“不愿意”,均不合题意。
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