题目内容：

The United States is full of cars. There are still many families without cars, 1. some families have two or more. However, cars are used for more than 2. (please). They are a necessary part of life.

Cars are used 3. business. They are driven to offices and 4.(factory) by workers 5. have no other way to get to their jobs. Farmers have to drive into the city in order to get supplies. Sometimes small children must be driven to school. 6. some cities, school buses are used only when children live more than a mile away from the school. When the children are too young to walk too far, their mothers take 7.(turn) driving them to school. One mother drives on Mondays taking her own children and the neighbors’ children 8.well. Another mother drives on Tuesdays, another on Wednesday, and so on. This is 9.(call) forming a car pool. Men also form car pools, with three or four men in turn driving to the place where they all work.

More car pools should be formed in order to put 10.(few) cars on the road and use less gas. Parking is a great problem and so is the traffic in and around cities. Something will have to be done about the use of cars.