答案：One possible version: Recently, our school carried out a survey about how middle school students use their lucky money. 20 per cent of the students would like to save it in the bank. 40 per cent of them want to buy some books on science or art. 15 per cent of them are so kind that they offer their lucky money to the children in poor areas. Others spend their lucky money on their hobbies such as music and sport. I think it is important to save for a rainy day.