听力原文：

G: As a student, what do you do to protect the environment?

B: I join a “Clean-Up Day group” and go to clean the street every Sunday.

G: How do you go to school? 

B: By bike. 

G: Riding a bike is good for your health and the environment. Do you recycle paper?

B: Yes. It’s easy to recycle paper. The students in our school often do so.

G: What do you do to save resources? 

B: For example, turning off the lights when I leave my room.

G: What else?

B: I try not to use paper napkins after meals.

G: That’s fantastic! Your actions can lead to a better future.

答案：6. C