听力原文：

G: What are you busy doing these days, Frank?  

B: We’re holding a new project — Green Hometown. 

G: Oh, what’s it about?  

B: It’s about how to protect the environment.      

G: Environment? What do you mean?  

B: I mean that we have two main problems. One is that the rivers are badly polluted and the water is very dirty.  

G: What’s the other one?   

B: Oh, the other is that the trees in the mountains are being chopped down.   

G: It’s true. We should do something to make the rivers cleaner and the mountains greener.  

B: You are right. First, we should stop littering into the rivers and begin cleaning them.   

G: And next?   

B: We should also plant more trees.   

G: Yes. Everyone is supposed to help make their hometown green.  

B: I agree with you. Everyone should play a part.  

G: Can I join you?            

B: Why not? Let’s take action.  

Question: What are the two main problems in protecting the environment?

参考答案： 

One is that the rivers are badly polluted. The other is the trees in the mountains are being chopped down.