This year some twenty-three hundred teen-agers(young people aged from13-19)from all over the world will spend about ten months in U. S. homes. They will attend U. S. schools, meet U. S. teen-agers, and form impressions of the real America. At the same time, about thirteen hundred American teen-agers will go to other countries to learn new languages and gain a new understanding of the rest of the world.

Here is a two-way student exchange(交换)in action. Fred, nineteen, spent last year in Germany with George's family. In turn, George's son Mike spent a year in Fred's home in America.

　　Fred, a lively young man, knew little German when he arrived, but after two months' study, the language began to come to him. School was completely different from what he had expected-much harder. Students rose respectfully when the teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no outside activities(活动).

　　Family life, too, was different. The father's word was law, and all activities were around the family rather than the individual(个人). Fred found the food too simple at first. Also, he missed having a car. 'Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it.'

　　At the same time, in America, Mike, a friendly German boy, was also forming his idea. 'I suppose I should criticize(批评)American schools', he says. 'It is far too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe your schools are better in training for citizens(公民). There ought to be some middle ground between the two. '

46. This year _____ teen-agers will take part in the exchange programme between America and other countries.

　　A. twenty three hundred　　　   B. thirteen hundred

　　C. over three thousand 　　　　 D. less than two thousand

47. The whole exchange programme is mainly to _____ .

　　A. help teen-agers in other countries know the real America.

　　B. send students in America to travel in Germany

　　C. let students learn something about other countries

　　D. have teen-agers learn new languages

48. Fred and Mike agreed that _____ .

　　A. American food tasted better than German food

　　B. German schools were harder than American schools

　　C. Americans and Germans were both friendly

　　D. There were more cars on the streets in America

49. What is particular in American schools is that _____ .

　　A. there is some middle ground between the two teaching buildings

　　B. there are a lot of after-school activities

　　C. students usually take fourteen subjects in all

　　D. students go outside to enjoy themselves in a car

50. After experiencing the American school life, Mike thought _____ .

　　A. a better education should include something good from both America and Germany

　　B. German schools trained students to be better citizens

　　C. American schools were not as good as German schools

　　D. the easy life in the American school was more helpful to students