David： Susan, you like sports, don t 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 don t have time any more.

Susan： That s too bad! Exercise is very important.

David： I know. I am getting fat, you see. Anyway, I don t want to be heavy.

Susan： Well, I m 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 o clock, at the swimming-pool?

David： All right. Good-bye!

Susan： Good-bye!