Next,I will take an exercise"Youth"to see the writing of this article.

　　What is youth?

　　What does youth mean for people of different ages?

　　As far as college students are concerned,youth is……

　　下面就以一篇习作《青春》来看看这种文章的写作。

　　①青春是什么?②对于不同年龄的人，青春又意味着什么?③就大学生而言，青春是……

　　参考范文：

　　How to Solve the Problem of Heavy Traffic?

　　With population rapidly increasing，heavy traffic has become a big headache for many cities.For this very reason，many government officials and experts have thought up some solutions，among which two draw much attention the country over.

　　Some people suggest that more and wider roads should be laid down.It is evident that it can relieve the traffic congestion in the streets，thus accelerating the flow of buses and cars.And meanwhile，the fast and smooth flow of traffic reduces the air pollution caused by engine-idling.But the disadvantage of this solution lies in the fact that too much land that could be used for farming or housing will inevitably be occupied by more and more roads.Therefore，others hold that the number of public bus routes should be raised so that more people can be transported and fewer people will have to travel in their own cars or ride bikes.Less use of bicycles and private cars will make the roads less crowded.Unfortunately，there is also a drawback in this solution;it will bring inconvenience to those who live or work far away from bus stops.

　　As neither of the two solutions is effective enough to solve the problem of heavy traffic in cities，I favor a combination of the two.While building more roads in places where land is less useful，we should increase the number of public bus lines.Only in this way can we more efficiently solve the problem of heavy traffic.