题目内容

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

——I guess so. It’s not difficult after all. 

A. should           B. could           C. must            D. might

 

C

【解析】

试题分析：句意为：她看上去很高兴，一定是通过了考试。因为前面她很开心了，所以推断她肯定是通过了考试了，因为这个推断的可能性比较大，所以用must have done“过去一定做了”，could have done本可以做却没有做，might have done过去可能做了…，所以选C。

考点：考查情态动词

 

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