参考答案

    Now more and more families have their own cars. It’s very convenient for the people who have their own cars to go to work or to take their children to school. In holidays, all the family can travel to some place or go to visit exhibition far away by car. They save a lot of their spare time. The car industry is developing more and more rapidly because people need more and more cars. With the development of car industry, the economy in China is developing rapidly too.
    But a lot of problems are coming about. Traffic in city is getting heavier and heavier. The air is being polluted more and more serious. To solve these problems, something must be done