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问题详情：

Each year there is an increasing number of cars on roads as millions of new cars and trucks are produced. Many Americans work at putting together parts of cars, driving trucks, or filling cars and trucks with gas. __11__

Most Americans would find it hard to imagine what life would look like without cars. __12__ The polluted air becomes poisonous and dangerous to health. __13__ That's what car factories have been trying to do. But to build a clean car is easier said than done. Progress in this field has been slow.

Another way is to take the place of the car engine by something else. __14__ Many makers believe that it will take years to develop a practical model that pleases man.

To prevent the world from being polluted by cars, we'll have to make some changes in the way we live, for example, people are encouraged to travel and go to work by bicycle. Bicycling is thought to help the air clean. But this change does not come easily. A large number of workers may lose their jobs if a car factory closes down. __15__

Although cars have brought us new problems, they also have led us to a better life.

A. Thus air pollution would become less important than unemployment.

B. Americans know cars very well.

C. However, some have realized the serious problems of the air pollution caused by cars.

D. One way to get rid of the polluted air is to build a car that does not pollute.

E. However, the number of vehicles has continued to increase in recent years.

F. Americans won't live without cars!

G. Inventors are now working on steam cars as well as electric cars.

【回答】

FCDGA

知识点：七选五题型

题型：阅读理解