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— She looks very happy. She __________ have passed the exam.
— I guess so. It’s not difficult after all.
A.shouldB.could
C.mustD.might
C。
“must+have+过去分词”表示对过去情况的肯定推测。由于“她看上去气色不错”,而且“考试也不难”,所以她一定是通过了考试。
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