问题
选择题
He has no idea what the book is about. He _____ have read it very carefully. [ ]
A. needn't
B. shouldn't
C. can't
D. mustn't
答案
答案：C
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He has no idea what the book is about. He _____ have read it very carefully. [ ]
A. needn't
B. shouldn't
C. can't
D. mustn't
答案：C