(2011·江西)It be the postman at the door.It's only six o'clock.A. mustn'tB. can't

发布时间：2020-08-17 09:26:30

(2011·江西)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

网友回答

A. mustn't
(答案→)B. can't
C. won't
D. needn't
解析：　根据It's only six o'clock推知，那不可能是邮递员，否定形式推测要用can't或couldn't。因为must表推测时，只能用于肯定句。
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