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— Who _____ be phoning us at this time of night?
— It might be your sister. 
A.might B.can C.dare D.must
B

试题分析:考查情态动词用法。A也许;B可能,能够;C敢;D必须,一定;句意:—谁可能在晚上给我电话呢?—也许是你的姐姐吧!根据句意是对一种可能性的推测,使用can表示可能。故B正确。
点评:情态动词就是表示说话者对事情的一种看法,也就是一种语气。情态动词的用法一直是命题者常设置的考点和重点,平时要加强记忆。值的注意的是,中学阶段的情态动词常考额有13个,can-could; may-might; should-ought to ;had better ;will-would;   need; have to .考生应注意对这13个情态动词的用法多总结,多运用。
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