1.Do you think that charities are a good idea? Why / Why not?Yes,it is because they can help poor people.
2.Have you ever been on a sponsored walk/swim/run, etc., for charity?Yes, I have been on a sponsored sell flags.
3.What unusual thing would you do to raise money for a charity? I would sing the song.
4.Are there any big or famous charities in your country? What do they do?Yes, we have Oxfam in Hong Kong and they help poor countries, such as provide emergency support, including food, shelter, water and hygiene kits, and follow up with rehabilitation assistance to help the poorest people rebuild.