听力原文：

B: Hey, Lisa. You ride a bike to school every day?

G: Yes. How do you come to school, Tony?

B: I usually take the subway.

G: How far is it from your home to school?

B: It's about 20 kilometers.

G: How long does it take you to take the subway?

B: It takes me about an hour.

Question: How far is it from Tony's home to school?

参考答案：

It's about 20 kilometers.