He knows so much about the story. He must have read the book ?A. mustn’t heB. doesn’t heC.

问题补充：

He knows so much about the story. He must have read the book,?A. mustn’t heB. doesn’t heC. hasn’t heD. didn’t he

答案：

“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。