He knows so much about the story. He must have read the book, ?
A. mustn’t he
B. doesn’t he
C. hasn’t he
D. didn’t he
网友回答
A. mustn’t he
B. doesn’t he
(答案→)C. hasn’t he
D. didn’t he
解析： “He must have read the book”中must 表示“一定，想必”等推测意义，而不表示“必须、禁止”等意义。“He must have read the book”相当于 “I’m sure he has read the book”相一致，即用hasn’t he, 而不用mustn’t he。