Mr. Black is a science teacher. He is young and strong. His students like him very much because he is funny. Mr. Black likes playing sports very much. He always plays badminton with his students after school. On weekends, if (假如) the weather is fine, he usually goes cycling near the West Lake.
However, Mr. Black was thin and weak before. At that time, he was very busy with his work and didn't have enough (足够的) time to do some sports. He went to bed very late at night. Sometimes he even(甚至) didn't have a good meal through the whole day. Soon Mr. Black began(开始) to feel not good. He thought that too much work without a rest was not good for his health. So he made a change. He began to do sports every day to keep fit(健康的).
See, how healthy he is now!
