听力原文：M: Right, this is the tennis club reception area. As a member, you don't have to register when you arrive. But you must remember to register your guests and you must be able to produce your membership cards if a club official asks to see it. W: How many guests can I bring with me? M: You can bring up to three at any one time. W: En, that's good. M: Yes, well, we want to attract people to our club. Now, here is the changing rooms with showers and lockers for your clothes and things. Obviously, you don't have to leave your clothes in the lockers, but we strongly advise you to it's much safer. W: How much do the lockers cost? M: Twenty cents. But you get the coin back when you take your things out. Right, and the tennis courts are around here to the left. W: En, and we can play for an hour at a time? M: You can book the courts for thirty minutes or an hour, but you can carry on playing until the next players arrive. W: Of course. Oh, what about the caf6 or bar? M: Yes, we have a club room which serves food and drink behind reception. The club room is open until eleven o'clock, but all players must leave the courts by ten o'clock. W: En, that seems very good. Thank you very much for showing us around. M: Pleasure! Members of the club are required to ______.