The private automobile （私家车） has long played an important role in the United States. In fact, it has become a necessary and important part of the American way of life. In 1986, sixty-nine percent of American families owned at least one car, and thirty-eight percent had more than one. By giving worker癫痫手术治疗费用s rapid transportation, the automobile has freed them from having to live near their place of work. This has encouraged the growth of the cities, but it has also led to traffic problems.
For farm families the automobile is very helpful. It has made it possible for them to travel to town very often for business and for pleasure, and also to transport their children to distant schools.
Fami惠州市治疗癫痫病的公立医院ly life has been affected （影响） in various ways, The car helps to keep families together when it is used for picnics, outings, and other shared experiences. However, when teenage children have the use of the car, their parents can't keep an eye on them. There is a great danger if the driver has been drinking alcohol or taking drugs, or showing off by speeding or breaking down traffic laws. Mothers of victims 肇庆市最权威的儿童癫痫病医院（受害者） of such accidents have formed an organization called MADD （Mothers Against Drunk Driving）. These women want to prevent further tragedies （悲剧）. They have worked to encourage the government to limit the youngest drinking age, Students have formed a similar organization, SADD （Students Against Drunk Driving） and are spreading the same message among their friends.
For many Americans the automobil患上癫痫病需要做哪些护理呢？e is a necessity. But for some, it is also a mark of social position and for young people, a sign of becoming an adult. Altogether, cars mean very much to Americans.
56. Which of the following is NOT mentioned in the text?
A. Cars have encouraged the growth of the cities.
B. Cars can bring families together when they go for picnics.
C. Cars have enabled pe