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 it. I need to take the shuttle bus from one class to another, or I will never make it on time. W: What do you need to know? I think it's a really great system. M: First of all, where does it go? W: The university shuttle bus goes all over campus. It does not leave the campus if you want to travel off-campus, you'll need to take the city bus. But the university shuttle bus will get you from one class to the next, very efficiently. M: And how much does it cost? W: It's 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 stand next to it. You can see the shuttle 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 all sounds good. Thanks for your help. W: No problem. What are the man and woman discussing?