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— There’s somebody at the door. Who ______ it be? Is it the postman ?
—No, it ______ be him. It’s just seven o’clock. It’s too early.
A.may, can’tB.will, won’tC.may, mustn’t D.must, may not
A

试题分析:句意:门口有个人,会是谁呢?是邮递员吗?不,他不可能是邮递员。时间才刚七点,天太早了。may表示“可能”,can表示肯定猜测,而否定猜测用can’t,won’t表示将来不,mustn’t表示禁止,绝对不能,may not表示可能不;故选A。
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