【答案】My name is Li Wei. Two years ago I often had a cold because I had an unhealthy lifestyle. I always stayed at home with nobody. The doctor told me to have a healthy lifestyle. I listened to the doctor's advice. Now I go to bed early and get up early. I don't eat junk food often but eat more vegetables and drink more water and milk every day. I exercise once a day and have a healthy diet. Exercise and good eating habits help me get better grades than before.
【解析】本篇书面表达要求写一篇文章来介绍自己。首先，要认真审题，掌握题目要求中的要点信息，需要回答的问题。然后整体把握写作的大致方向，谋篇布局。要点为：1. 两年前生活习惯不好，常感冒. 总是一个人待在家里。2. 医生建议要有健康的生活方式。3. 我早睡早起，不吃垃圾食品，吃更多蔬菜，喝更多牛奶和水。4. 锻炼身体和好的饮食习惯帮助我取得了好成绩。写作中运用到一般过去时态和一般现在时态，注意上下文的过度。可以参考的固定短语有"have a cold；stay at home；tell sb to do sth；listen to the one's advice"等以及复合句和比较级句型的使用"Two years ago I often had a cold because I had an unhealthy lifestyle. Exercise and good eating habits help me get better grades than before."。