—She looks very happy. She ________ have passed the exam.
—I guess so. It's not difficult after all.
| A.should | B.must |
| C.could | D.might |
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—She looks very happy. She ________ have passed the exam.
—I guess so. It's not difficult after all.
| A.should | B.must |
| C.could | D.might |
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