--Listen! Someone is singing in the next room．Who         it be? Is it Wei Fang?
--No．It         be her．She is at school now．
A．can; may notB．must; mustn’t
C．can; can’tD．may; won’t
C
考查情態(tài)動詞。Can意思是能，否定含義是不能，不可能。Must意思是一定，必須，否定含義是禁止；may意思是可以，否定含義是不可以。句意：聽！有人在隔壁唱歌。他可能是誰？它是衛(wèi)芳嗎？——不，不可能是她。她現(xiàn)在在學校呢。選C。
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