听力原文：

G: We will have a picnic tomorrow. What will the weather be like?  

B: I think it will rain.  

G: How do you know?   

B: It’s raining today. And the radio says that it will rain again tomorrow.  

G: Will the bad weather last long?   

B: I don’t know. But I wish it wouldn’t rain tomorrow.  

G: So do I. I want to have the picnic very much.  

B: Yes. We haven’t had one since we did last July.

答案：5. C