问题
单项选择题
I locked myself out of my apartment. I didn't know what to do."You may call your roommate."
A．could have called
B．might have called
C．would have called
D．must have called
答案
参考答案：A
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。