听力原文：W: Hi, John! M: Oh. Hi, Laura. What' re you doing here? W: Uh ... I' m usually here on weekends. It' s my dad' s shop. So you' re looking for a bike? M: Yeah. Now that the weather' s warming up, I thought 1' d get some exercisc—instead of taking the bus all the time. W: Well, you came to the fight place. Do you know what you' d like? M: Well, I don' t want a racer or a touring bike or anything. Mostly I' 11 just be using it to get me back and forth from work. W: How far is that? M: About four miles. W: Are there a lot of hills on the way? M: Some, I guess, But ... uh ... maybe I should just tell you up front that I' ye only got a hundred and fifty dollars. Can I get anything decent for that? W: Well, you' re not going to get anything top-of-the-line--but we do have a few trade-ins in the back that' re in good condition. M: That sounds good. W: And you' re fight, for the kind of riding you' re going to be doing, the most important thing is comfort. You want to make sure it' s the right height for you. Follow me and I' 11 show you what we' ve got. (20)