A: Hello, everyone .Today, we will talk something about private cars（私家车）.

B: OK .Private cars are a hot topic now .And more and more families own private cars. Private cars, as the product of modem civilization, have been playing a vital role in people's daily activities.

C: Yes, private cars are a convenient mean of transportation .If I have private car, I can go wherever I like.

A: Nowadays more and more private cars have entered thousands of ordinary families. Private cars are used every day to carry in people to and from work. At weekends, private cars take families on joyful outings. Most of people living in the city like private cars very much.

C: And there is no doubt that private cars will have a great impact on the economic growth. The rapid car industry growth will contribute much to keeping the country's economy growing at a higher rate in the near future.

D: But, private cars have also given rise to a series of problems. For example, the street are crowded with cars. They not only cause traffic accidents which injure or kill a large number of people each year, but also make great noise and give off many poisonous（有毒的） gases

A: En, the polluted air given off by cars will do great harm to our health, too many private cars will lead to traffic jams and a great deal of energy will be wasted and so on.

C: But I believe we can solve all of the problems in the near future. Many countries research green cars, purification（净化） the exhaust（尾气）, and they research new energy.

B: Yes, I agree with your perspective .I also believe that this day will come true soon. A: Private cars, like everything else, have more than one face, we can’t say it is a good or bad thing , it just as a coin has two sides , so there are both advantages and disadvantages of having a private car.

D: Yes, owning a private car has both its advantages and disadvantages. It is advisable that we should pay much attention to the environmental protection by not having a private car if we have little or no practical use of the private car.

B: So I think we should take advantages of private cars and make them serve us better. Meantime we hope that satisfactory（令人满意的） solution to these negative problems will be found soon.

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