Question

He ________ the exam, but he was too careless.

A. could have passed              B. couldn’t have passed

C. must have passed                D. may have passed

 

Answer 1

【答案】

A

【解析】

试题分析：此处could have passed the exam表示本能通过考试，实际上没有。句意：他本能通过考试的，但是他太粗心了。

考点：考查虚拟语气的用法。