题目内容
—Will you answer the telephone? It __________ be your mother.
—Sorry. I _________. I’m busy.
A. may; mustn’t B. will; can’t C. might; can’t D. can; will
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题目内容
—Will you answer the telephone? It __________ be your mother.
—Sorry. I _________. I’m busy.
A. may; mustn’t B. will; can’t C. might; can’t D. can; will