题目内容
---- Will you answer the telephone? It ________ be your mother.
---- Sorry, I _______. I’m very busy.
A. can, mustn’t B. will, can’t
C. may, can’t D. need, will
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题目内容
---- Will you answer the telephone? It ________ be your mother.
---- Sorry, I _______. I’m very busy.
A. can, mustn’t B. will, can’t
C. may, can’t D. need, will