----- Mary looks very upset. She _______ failed to pass the exam. ----- I guess so. It's very d

题目简介

----- Mary looks very upset. She _______ failed to pass the exam. ----- I guess so. It's very d

题目详情

----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It's very difficult after all.
A  must have   B could have   C should have  D might have
题型:单选题难度:中档来源:不详

答案

A
本题考查情态动词的用法。句意:玛丽看起来很沮丧。她一定没有通过考试。must have done过去一定做过某事。

更多内容推荐