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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. could C. might D. must

D

【解析】

试题分析:考查情态动词。本句考查情态动词表猜测。情态动词表猜测有以下情况:表肯定猜测用must、表否定推测用can’t、couldn’t;表可能用may、might;疑问句中表可能用can、could;表应该用should。本句中根据she looks very happy可知她看起来很开心,所以下文是很肯定的猜测,她肯定通过了考试。故选择D。

考点:考查情态动词

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