Question

(2013·四川高考)—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

 

Answer 1

A

【解析】选A　考查情态动词。句意：“你的眼睛为什么这么红？昨晚你不可能睡好觉。”“是的，我熬夜写一篇报告。”can't have done表示对过去事情的推测，表示“不可能做过某事”。