In the United States，train transportation is unpopular pared with cars and airplanes．Most people like traveling by car or by air.
Officials of the United States Department of Transportation made a study in 2001．The study is about how many miles Americans traveled by different means of transportation．They only studied trips longer than 50 miles．The study showed that fifty-six percent of all miles were traveled in personal vehicle．Forty-one percent were traveled in an airplane．Two percent were traveled in a bus．And less than one percent of miles were traveled in a train.
Amtrak is the national provider of train transportation in the United States．In the past ten years，the number of its passengers has increased by eighteen percent．Although the number of passengers has increased，it is still very small now．In countries such as France，Germany，or Japan，more people use trains．
There are several reasons why many people ．
Firstly，Americans love to drive their own cars．On highways，cars can travel as fast as trains．These highways connect all major cities in America．Secondly，many travelers like to be independent．When they use their own cars they can decide when to travel．Thirdly，many buses travel between major cities．Bus travel is less costly than train travel.
In a huge country like the United States，cities are far away from each other．In some cases，travel from one city to another by train may take more than a day．Airplanes can carry passengers over long distances much faster．People who do not want to spend long time traveling by train decide to fly．For these people saving time is the most important thing.
【小题1】What is the best title of the passage? （Please answer within 10 words.）
【小题2】Which sentence in the passage can be replaced by the following one?
It’s convenient for people to decide the start-off time when they travel in their own cars.
【小题3】Please fill in the blank in the fourth paragraph with proper words or phrases to plete the sentence.（Please answer within 10 words.）
【小题4】What means of transportation do you like best when traveling，trains，cars，or planes? Why? （Please answer within 30 words）
【小题5】Translate the underlined sentences in the last paragraph into Chinese.Train transportation in the USA is less popular．
网友回答
(答案→)Train transportation in the USA is less popular．
解析：
【小题1】主旨题：文章第一段的主题句train transportation is unpopular pared with cars and airplanes．可知美国的火车不是很受欢迎：Train transportation in the USA is less popular．
【小题2】两句话的意思都是：自己开车的时候可以选择什么时候出发：When they use their own cars they can decide when to travel．
【小题3】下文解释的是为什么美国人不喜欢乘火车：don’t like to travel by train
【小题4】文章第五段讲的是人们为什么喜欢开车，第六段讲的是人们为什么喜欢乘飞机：Usually I’d like to travel by car, because I can decide when to travel．
If it is a long distance, I’ll travel by air, because it is faster．
【小题5】翻译这句话要注意定语从句who do not want to spend long time traveling by train修饰people，第二句话里面的saving time是动名词做定语，译文是：那些不想花长时间坐火车旅行的人就决定乘飞机,对这些人来说，节约时间是最重要的。