David： Susan, you like sports, dont you?Susan： Yes. I have sports every afternoon.
David： Do you often go swimming?
Susan： Yes, I go swimming once a week.
David： I used to swim at middle school, but I dont have time any more.
Susan： Thats too bad! Exercise is very important.
David： I know. I am getting fat, you see. Anyway, I dont want to be heavy.
Susan： Well, Im going to swim this afternoon. Do you want to go with me?
David： OK! I really need more exercises. When and where shall we meet?
Susan： How about three oclock, at the swimming-pool?
David： All right. Good-bye!
Susan： Good-bye!