Situation: Li Li Ming lives in Shanghai. Last week his uncle came to visit him. Li Ming showed him around. He showed his uncle the great changes in Shanghai.L: Welcome to Shanghai, Uncle!U.. Thanks. I haven't been here for 5 years.L. Do you miss Shanghai?U. Yes, of course. Great changes have taken place in Shanghai since I left five years ago.L. Sure, look! There used to be dark and small houses here.But now there's a big park.U: How beautiful it is!L: Let's go to the park now.U: That's a good idea. Where's the ticket office?L: Oh, tell you the truth. The park is free.U: Really. That' s good !L: In fact, in Shanghai more and more parks are free of charge.U: It' s quite good.