听力原文： (28[B]) The Masters Series Madrid event has taken the novel step of employing models to act as ball girls' next week. Instead of using youngsters from local clubs, the organizers have recruited 25 female models to do the job, despite the fact that (29[C]) some do not know much about the sport. 'Before taking them on court to practice, we have shown them a bit about the sport, how you play, (30[C]) what a 'set' is, what a 'game' is and an ace,' explained their coach ]ulio Nieto. 'They will add beauty, but we still have to work on a lot of details so everything works smoothly. 'The important thing is for them not to disrupt the rhythm of the game or distract the players,' he added. A total of 2,425,500 euros in prize money is on offer. Who will be the ball girls at the Masters Series Madrid event?