—Must I return the book this week?
— No, you ____. You can ____ it for 20 days.

A: What’s the matter with you, young man?

B: Oh, doctor. I’m not feeling well. (46)________ I think I will die.

A: Die? I don’t think so. Take it easy.（放轻松）(47)____________

B: Ahh... I must have a terrible illness.

A: Em... (48)_________ I am sure you will be all right soon.

B: But I really feel very terrible. What should I do now?

A: (49)__________ ___ 

B: Is that all?

A: You should drink more water and you shouldn’t eat spicy（辣的）food.

B: (50)______________

A: No, you needn’t

 －Must I go and get some water now?   －No, you __________.

A．needn't           B．may not           C．mustn't           D．don't

—Must I finish the homework tonight?
—No, you        .You can finish it tomorrow.

Once a Frenchman    36___ in England. He didn’t know English very well. One day he went to the post office with a postcard. He bought a    37  . Then he gave the stamp and the postcard to the girl    38  the desk. “Oh, no,” the girl said, “ you must stick（贴）the stamp on yourself.” He was very    39  . He couldn’t believe his ears. “Why must I stick the stamp on    40  ?” he asked. “Oh,” said the girl, “I mean that you must stick the stamp on the postcard. And you must do it yourself.”