求一篇英语作文!关于中学生参加志愿者活动写一份演讲稿

want to be a volunteer of beijing olympic games. I realized the time I must study english very hard. Because English is very useful and it is very important. And to be a volunteer of the olympic games is good for myself too.I can make some friends from different countries and learn more about sport,about olympic. But the first thing to perpare this is study hard, I am confident i will to be a good volunteer and I will show the world:our country and our cities are so perfect in the world.