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。