Debbie: Where have you been? You missed the announcement about the music festival. John: I was at the doctor's office. Music festival? Frank: Yes, it's going to be next month on the school sports field. John, you can play the piano. How about playing it at the festival? John: Well, I'd rather play the violin. I can play Liang Zhu. Frank: Wow! Sounds good. What about you, Debbie? Debbie: Actually, I don't have much musical ability. I'd prefer just to help out with the crowds. Frank: You can sell tickets or work at a food stand. John: So can I assume that the aim of the festival is to raise money? Debbie: Yes. All of the money will go to charity. John: Well, if it's for a good cause, everyone should take part!