As we all know, the United States is full of cars. There are still many families without cars, 【小题1】 some families have two or more. However, cars are used for more than 【小题2】 (pleasant). They are a necessary part of life.

Cars are also used for business. They are driven to offices and factories by workers 【小题3】 have no other way to get to their jobs. When salesmen 【小题4】 (send) to different parts of the city, they have to drive in order to carry their products. Farmers have to drive into the city in order to get 【小题5】 (supply).

Sometimes small children must be driven to school. In some cities, school buses are used only 【小题6】 children live more than a mile away from the school. If the children are too young to walk too far, their mothers take turns 【小题7】 (drive) them to school. One mother drives on Mondays taking her own children and the neighbors’ as well. Another mother drives on Tuesdays, another on Wednesday, and so 【小题8】. This is called forming a car pool. Men also form car pools, with three or four men taking turns driving to 【小题9】 place where they work.

In spite of this, more car pools should be formed in order to put fewer cars on the road and use 【小题10】 (little) gas.

Sitting back in my seat, I can’t quite believe that I’m about to travel along the railway that many foreign 【小题1】(expert) claimed was “impossible”. The train 【小题2】(race) along steadily since it left Xining. I was one of the people who came from all parts of China to work 【小题3】 this railway. When we built the great railway, how 【小题4】(protect) the ecosystem was among the top concerns. The first landmark 【小题5】(catch) my eye is the splendid Qingshuihe Bridge, 【小题6】 is the world’s longest bridge built over permafrost. Such bridges were built to allow the animals to move safely and freely in their 【小题7】(nature) habitat. There are other bridges built to prevent damage to wetlands and grasslands. To make sure that railway workers stay healthy, several oxygen-making stations 【小题8】(construct). The railway workers also could enjoy regular breaks in lower areas. 【小题9】(use) thousands and thousands of sandbags, we built a long wall along Cuona Lake to protect it from construction waste. I am proud that we built our “impossible” railway in the world with 【小题10】 care the environment deserves.

Bicycles, 【小题1】 used to be a major means of transportation, are becoming popular again. New York City, together with London, Paris, Hangzhou and many other 【小题2】 (city) throughout the world, gets bike-sharing systems of their very own. More and more people are considering using bikes 【小题3】 a replacement for cars, and how to improve bike-friendly crossroads is also under discussion.