书面表达。 2008年10月26日，全国亿万学生阳光体育冬季长跑活动正式启动。根据活动要求，每天长跑距

On October 26, 2008, hundreds of millions of students all over China joined in a national students sports program. Primary students should run 1000 metres a day, junior students 1500 metres while senior and university students 2000 metres.      It encourages/ calls on students to exercise for an hour every day in the hope that they will have good health to work fifty years and enjoy the whole life. Meanwhile, running can improve their sense of perseverance.      The program was carried out in our school on October 28 school. Personally, I think it a good idea to have daily exercise. Although we spend an hour a day for exercise, it is well worth it. Taking exercise especially running helps us build up our body and keep a clear mind. Therefore we can work more efficiently. 答案不唯一