The private automobile has long played an important role in the US. In fact, it has bee 【小题1】 necessary and important part of the American life. In 1986, sixty-nine percent of American families owned 【小题2】 least one car, and thirty-eight percent had 【小题3】 than one. With the convenience of rapid transportation, workers don’t have to live near their workplace. This has encouraged the growth of the cities, 【小题4】 it has also led to traffic problems.
For farm families the automobile is very helpful. It has made 【小题5】 possible for them to travel to town very often for business and for pleasure.
Family life has been affected in 【小题6】 ways. The car helps to keep families together. However, when teenage children use the car, their parents can’t keep an eye on them. There is a great danger 【小题7】 the driver has been drinking alcohol or taking drugs or breaking 【小题8】 traffic laws.
Cars mean very much to Americans.a
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(答案→)a
解析：本文叙述了美国的私家车越来越多，它已经成为美国人生活的组成部分，有的家里还不止一辆车，它给美国人的生活带来了一些方便，但是当十几岁的孩子用车时，家长无法监控他们，如果他们喝了酒或吸了毒有可能给交通带来一些危险。
【小题1】考查固定短语。bee a part of 成为一个组成部分，是固定短语。
【小题2】考查固定短语。at least至少，是固定短语。
【小题3】考查固定短语。More than多于，是固定短语。
【小题4】考查连词。But表示前后是转折关系。
【小题5】考查短语。Make it+形容词+for sb to do ，这里it是形式宾语，真正的宾语是for sb to do.
【小题6】考查形容词。这里用形容词来修饰名词，故用various/different/many.
【小题7】考查连词。如果司机喝酒开车的话就会有危险，故选if.
【小题8】考查形容词。这里用形容词或冠词来修饰名词，故用other/the.