4. 辰辰和瑶瑶正在讨论假期旅行想要去的城市。请选择正确选项补全对话。
A. What can we do there?
B. It’s in the southwest of China.
C. Is there any special food?
D. What a wonderful city!
E. Why do you like this city?
Chenchen: The winter holiday is coming soon. Which city do you want to visit?
Yaoyao: I want to visit Chengdu.
Chenchen: Where is it?
Yaoyao: ① It’s a very beautiful and relaxing（令人放松的） city.
Chenchen: ②
Yaoyao: We can see lovely pandas and visit many old streets.
Chenchen: ③
Yaoyao: Yes. We can enjoy hot pot. It’s famous and delicious.
Chenchen: Sounds great! ④
Yaoyao: Because life there is slow.
Chenchen: ⑤

4. ① B ② A ③ C ④ E ⑤ D

5. 在研学成果分享会上,同学们正在讨论城市发展带来的问题,请你读一读,在横线上填入恰当的内容。

pollution, dirty, bad, 略