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--Listen! Marry is singing in the next room.

? -- It __?? ___ be Marry. She has gone home.

A. mustn’t??????? B. may???????? C. can’t????????? D. should

--Listen! Marry is singing in the next room.

-- It _____ be Marry. She has gone home.

A．mustn't         B．may         C．can't            D．should