(2011·江西)It ________ be the postman at the door.It"s only six o"clock.A.mustn"tB
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(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 |
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答案
B |
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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