-Why are your eyes so red? You have slept well last night.-Yeah, I stayed up late writing a report.A．can’tB．mustn’tC．needn’tD．won’t 题目和参考答案——青夏教育精英家教网—

—Why are your eyes so red? You _______ have slept well last night.
—Yeah, I stayed up late writing a report.

A．can’t

B．mustn’t

C．needn’t

D．won’t

试题分析：考查情态动词+完成式的用法：本题考查情态动词表推测的用法。句意：——你的眼睛为什么那么红？昨天你不可能睡好。——我熬夜到很晚，写一份报告。A. can’t have done过去不可能做了，B. mustn’t 表示推测用于肯定句中， C. needn’t have done本不必做而做了，D. won’t have done将不会已经做了，答案 A。

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