rain.

　　3． (多进行体育锻炼)you'll get/become really fit.

　　4. That (最好不过).

　　【答案】　1.saw him heading 　2.that's because　3.Take more exercise and 　4.couldn't be better

　　Ⅳ.回顾话题

　　【导学号：04542005】

　　用本模块词汇或句式完成写作任务

　　健康与饮食和锻炼有关，但人们对一些年轻人的健康很担忧。他们迷恋电脑游戏、吃垃圾食品、很少参加体育活动。结果造成超重引起不健康。为了保持健康，他们必须平衡饮食并进行更多的锻炼。我们希望他们拥有健康的生活方式。

　　【参考范文】

　　Good health is connected with diet and exercise.But nowadays people are very anxious about some young people's health.They are crazy about computer games，eat junk food and rarely take part in sports.As a result，they become overweight and unhealthy. To keep fit，they should have a balanced diet and take more exercise.We hope that they have a healthy lifestyle.