补全对话。从方框中选出适当的句子补全对话。
A: Lucy, why are you going out 【小题1】?
B: That’s the sound of a truck collecting rubbish.
A: Do you mean you have to take the rubbish to the truck?
B: Yes. You know 【小题2】 is our duty. We should help protect the environment.
A: I agree. 【小题3】, we must do something around the neighbourhood.
B: Sure. It is our duty to keep the environment clean and tidy. If we make a contribution to protecting the environment, 【小题4】
A: That’s right. We mush try our best to make our country more beautiful. So we should 【小题5】 to improve the environment.
A. taking care of the environment
B. the world will bee much more beautiful
C. do something useful
D. after hearing the music
E. Wherever live
D
网友回答
(答案→)D
解析：
【小题1】根据下文那是卡车收垃圾的声音，可知上文题文与声音有关，故选D，你为什么听到音乐后出去了？
【小题2】结合下文We should help protect the environment.可知选A最符合此时语境，你知道保护环境是我们的义务。
【小题3】通过下文do something around the neighbourhood.可知上文与地点有关，故选E Wherever live无论我们住在哪儿。
【小题4】通过上问，如果我们每个人都能为保护环境尽一份力，可知选B，最符合逻辑关系，世界就会变得更加美丽。
【小题5】结合上下文可知语义为，因此我们应该做些有用的事情来改善环境。选C。