补全对话。 A. You must have a good time. B. You helped clean up the city park. C. It's a mixture of fun and work. D. Some picked up the waste paper and plastic bags. E. You helped cheer up sick people. F. I went to play in the park. G. I hope more and more people protect our environment. Ting Ting: How was your weekend? Xiu Xie: (1) Ting Ting: What did you do over the weekend? Xiu Xie: I went to the People's Park on Saturday morning with some of my classmates. Ting Ting: Oh. (2) Xiu Xie: Not really. When we went into the park, we saw rubbish everywhere. It was very dirty. Ting Ting: It's true that some travelers littered about. Then what did you do? Xiu Xie: We began to clean the park. (3) Some swept the ground…About an hour later, we cleaned up the park. We were happy though a little tired. Ting Ting: (4) People will thank you. Xiu Xie: Yeah. When we were cleaning the park, some volunteers came, (5) We should regard our city as our home. Ting Ting: Then our city will become more and more beautiful.