单选题 I locked myself out of my apartment. I didn't know what to do. "You {{U}}may call{{/U}} your roommate."

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

【正确答案】 A

【答案解析】[分析] 词语运用本句考察得是：情态动词+不定式完成式的应用，can/could，may/might，must +have +动词-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。