—Listen! Someone is singing in the next room. Who _______ it be? Is it Wei Fang? —No. It _______ be
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题目简介
—Listen! Someone is singing in the next room. Who _______ it be? Is it Wei Fang? —No. It _______ be
题目详情
—No. It _______ be her. She is at school now.
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B. must; mustn't
C. may; can't
D. may; won't
答案