你的开头写的有误， 改正如下：
We had a sports meeting at our school today. It was a fine day and we participated the events we are good at. Maria took place in the girl's 100-meter rely and won the first place with other three girls. We all cheered them up when they were in competition. But Liu Lin did badly on his long jump. He disqualified because he touched the red line three times on his last step in his running. What a pity he had because he is good jumper. Most importantly, I won the 1000- race among 20 competitor. It was quite hard during the running. But I just kept my pace and tried my best. How wonderful the day was!
