题目内容

Today is Wednesday. He _______be at home. He _______be at school.
A．can't; canB．can't; must
C．mustn't; must D．mustn't; can
B

试题分析：句意：今天是星期三。他不可能在家。他一定在学校。在肯定句中表示推测可以用must，在否定句中表示推测可以用can’t。
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