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She has no idea of what the book is about.She __ have read i

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She has no idea of what the book is about.She __ have read it very carefully.A.mustn't B.can't
C.shouldn't D.needn't 选哪个啊 求指导
She has no idea of what the book is about.She __ have read i
应该选B表示推测,肯定没有
她根本不知道这本书是讲什么的.她肯定没仔细读(这本书).
A选项表示禁止,不能表示推测,C选项表示不该做却做了,D选项表示某事已经做了,但后来觉得没必要去做.
所以选B