THE 2008 Beijing Olympic Games was very successful. We should thank the nation's more than 1.7 million Olympic volunteers for their hard work. When big sports events happen, such as the Olympics and the Asian Games, usually a large number of volunteers are needed. If you do such voluntary work, you can gain experience that you can't get elsewhere. You might receive professional training before taking the job. You will face a lot of unexpected (出乎意料的) situations. You're also likely to meet and get to know people from different cultural backgrounds (背景). When it's finished, you will feel a strong sense of achievement (成就感). You will be very proud of yourself.