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
网友回答
“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。