听力原文：

G: How long have you been away from your hometown, Gavin?

B: I have been away for three years.

G: How is it now?

B: Great changes have taken place in my hometown in the past few years.

G: Could you please tell me more?

B: There is a science museum and two big parks in my town. Lots of kids go there on weekends.

G: Is there a swimming pool in your hometown?

B: We haven’t had a swimming pool so far, but there will be one next year.

Question: How long has Gavin been away from his hometown?

参考答案：

He has been away from his hometown for three years.