-She looks very happy .She---have passed the exam.

问题描述:

-She looks very happy .She___have passed the exam.
-Iguess so.It's not difficult after all
A.should
B.could
C.must
D.might
要解释为什么...
1个回答 分类:英语 2014-09-17

问题解答:

我来补答
c must have done 对过去事实最有把握的肯定推测
句中有提示"她看上去很开心"和"考试根本不难"说明说话者对这一事实的肯定态度.
 
 
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