听力原文：M: Can you tell me about the university shuttle bus system? This is such a large campus, and I have classes all over campus. I need to take the shuttle bus from one class to another, or I'll never make it on time. W: What do you need to know? I think it's a really ~eat system. M: First of all, where does it go? W: The university shuttle bus system goes all over campus. It doesn't leave the campus if you want to travel off-campus, you'll need to take the city bus system. But the university shuttle bus system will get you from one class to the next very efficiently. M: And how much does it cost? W: I'ts free, can you believe it? So you don't have to pay a cent to get all around the university campus. M: That's really great. And how do I catch the shuttle bus? W: Just look for one of the bright yellow shuttle bus signs, and go sand next to it. You can see the yellow shuffle bus signs all over campus. A shuttle bus will come along approximately every five minutes, so you shouldn't have to wait long. M: That sounds good. Thanks for your help. W: No problem. (20)