题目内容

She __________ be here. I saw her come in.
A．canB．mayC．shouldD．must
D
考查情态动词。句意“她一定在这里，我看见她进来了。”can“可能”；may“可能”，可能性比can小；should“应该”；must“一定”，用于肯定推测，否定推测用can’t。故选D。
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