She ___ know the answer,but I'm not sure.A.maybe B.may be C.may D.must

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She ___ know the answer,but I'm not sure.A.maybe B.may be C.may D.must
She ___ know the answer,but I'm not sure.A.maybe B.may be C.may D.must

She ___ know the answer,but I'm not sure.A.maybe B.may be C.may D.must
C may表示可能,如果用maybe就不是动词,后面的动词作谓语know必须跟主语she用三单knows才对,但现在后面是动词原形,所以前面这个空格要用谓语,B也是情态动词但已经有了know就不要再用be,must表示肯定地推测都错

A maybe she knows
B may 后面be 作宾语的话 know就没有位置了
C 她可能知道
D 她一定知道,而后面又说我不确定
选c

must

A
maybe 可能 或许

句意:她可能知道答案,但我不确定
maybe:(adv 大概,可能) 但要要放在句首
may be:不存在这个词组
must:(一定) 与整个句子大意矛盾
选C

选A,“maybe”意思是“或许,可能”,为副词,修饰谓语动词。
B项:“may be”为“情态动词+be动词”,意思是“可能是,可能在”,在句中充当谓语,此句已有“know”这个谓语,无须谓语。C、D均为副词,与句意不符

A是副词,这里应该是A.意思是可能,也许
B不能用,因为有know会和be矛盾,一个句子是不能有两个动词的
C也不能,may单独用在这里是动词,后面常带不定式,如may to rain
至于D是肯定推测,在这里排除

因为后面 but I'm not sure排除D。
may be是词组,已经有一个be动词了,后面就不能再接know这个动词了。排除B
maybe如果放She前面就对了,这边位置错误。排除A
may是情态动词,符合题意。
故选C
谢谢给分噢

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