—I locked myself out of my apartment. I didn’t know what to do. —You may call your roommate.

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问题 —I locked myself out of my apartment. I didn’t know what to do. —You may call your roommate.

选项 A、could have called
B、might have called
C、would have called
D、must have called

答案A

解析 本句考察得是:情态动词+不定式完成式的应用,can/could,may/might,must+have+动词一ed形式用于对过去发生动作的主观判断,表示推测过去某动作“可能”、“也许”“一定”已发生;口语中一般用can代替may;本句是两人的对话;因此A为答案。
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