6. M: What’s wrong with you? That’s your third cup of coffee since lunch.

    W: Yeah, well. I stayed up all night. I can hardly keep my eyes open.

7. M: Please tell David I have no time to play with him this afternoon.

    W: Why not tell him yourself?

    M: Because I will have an exam"and"I must review my lessons.

8. W: You’re going to Beijing, aren’t you?

    M: Yes. My father wanted me to fly there, but I think taking the train is much cheaper than driving or flying.

9. W: My class visited the farm last Tuesday.

    M: Really? We visited it last Tuesday, too.

10. M: How many students are there in your class?

     W: There are only thirty-two."And"half of them are boys.