题目内容
It ________ be the postman at the door. It's only six o'clock.
A.mustn't
B.can't
C.won't
D.needn't
B解析:根据题中“It's only six o'clock.”可知,时间太早,不可能是邮递员来敲门,所以答案为B项can't,表示针对现在的非常有把握的否定推测。
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题目内容
It ________ be the postman at the door. It's only six o'clock.
A.mustn't
B.can't
C.won't
D.needn't
B解析:根据题中“It's only six o'clock.”可知,时间太早,不可能是邮递员来敲门,所以答案为B项can't,表示针对现在的非常有把握的否定推测。