He must be in his room now ,_____?A.mustn't B.isn't he请注明原因,3Q

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Hemustbeinhisroomnow,_____?A.mustn''tB.isn''the请注明原因,3QHemustbeinhisroomnow,_____?A.mustn''tB.isn''the请注

He must be in his room now ,_____?A.mustn't B.isn't he请注明原因,3Q
He must be in his room now ,_____?
A.mustn't B.isn't he
请注明原因,3Q

He must be in his room now ,_____?A.mustn't B.isn't he请注明原因,3Q
He must be in his room now ,___B__?
A.mustn't B.isn't he
本题选B,因为这句中的情态动词must(肯定,一定)是用来表推测,而 must表推测时,反意疑问句应该看must后面的词,而不用must本身.
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b

B

A.

选B这个比较特殊,是约定俗成的,你记住就好了

选B,因为句中的情态动词must(肯定,一定)是用来表推测,而 must表推测时,反意疑问句应该看must后面的词,而不用must本身。

支持四楼

must 的反意疑问句一般不用must 只有是禁止的意思时才用本身的 有could或依题意 如题中的 就用be动词 选B

b