This year 1 twenty-three hundred teenagers from all over the world will spend about ten months in U. S. 2 . They will attend U. S, schools, meet U. S. teenagers, and form 3 of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new 4 and gain a new understanding of the rest of the world.

　　Here is a two-way student exchange in action. Fred, nineteen, spent last year in Germany with George's family. 5 , 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 6 . Students rose respectfully when the teacher entered the room. They took fourteen subjects 7 the six that are usual in the United States：There were almost no 8 activities.

　　Family life, too, was different. The father's word was 9 , and all activities were around the family rather than the individual. Fred found the food too simple at first. 10 , he missed having a car.

　　“Back home, you 11 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 12 boy, was also forming his idea. “I suppose I should criticize American school,” he says. “It is far too easy by our 13 . But I have to say that I like it very much. In Germany we do nothing but 14 . Here we take part in many outside activities. I think that maybe your schools are better in training for 15. There ought to be some middle ground between the two.”

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How many plastic bags do you use every day? 46 there any chance for us to live without them? What can we do to have 47   plastic pollution? A performance in Hangzhou makes people   48  more about the overuse of plastic bags in our lives.

In front of a supermarket in Hangzhou , five volunteers 49  white plastic bags and walked around and through the crowd. The performance   50  people to use more cloth bags  51     plastic ones.

Some of the plastic bags worn by the performers were collected from customers in two food markets and 52  were collected by 700 students from a middle school.

On that day, when leaving the food markets, customers were told to hand over 53  plastic shopping bags. 54  plastic bags were collected in two hours.

“ If we do 55  about it, the earth will be eaten up by white pollution. And 56  will become ‘plastic men’,”said one of the performers.

“How can you breathe in 57  plastic bags?” A   58   woman asked one performer.“How can the earth breathe 59   there are too many plastic bags?”the performer answered.

Starting in June 2008,plastic bags were 60  given for free in supermarkets,shopping malls or food markets all over the country.

People are called on﹙号召﹚to use cloth bags when they go shopping.

The more books you read, the better your life will be. If you don’t believe me, please consider the following reasons to read more books.

You will have strong brain power .Studies suggest reading makes you smart. Unlike watching television, which requires no thought process（过程）, reading is an active learning experience that will keep your mind sharp (even in old age). 　　
You will travel to a new world .　Sometimes our daily life can start to get boring . At times like this, I like to dive into a good fiction book, where I can forget about whatever problems are stressing me out. I’ll come back refreshed after my mini-vacation to a fresh and exciting place in the world of words. 　　
You will improve your vocabulary .　The more words you’re able to use, the better you will become at expressing your thoughts and feelings. I couldn’t imagine how I would write articles like this if I didn’t actively aim to improve my vocabulary, because using the same few words to express myself would get awfully boring in a hurry. 　
You will entertain yourself at a low price .If you’re looking for entertainment without much money, reading is your best choice. Thanks to the popularity of electronic reading devices(设备), it’s never been easier to entertain yourself for hours at a time, for the low cost of a few dollars.
You will discover surprising new ideas.　　Reading introduced me to concepts （概念）like mindful eating, relaxation exercises, and the importance of loving yourself. If I didn’t read, I wouldn’t realize these ideas. If you don’t read, you will miss many surprising new ideas.　　
You will become an expert（专家） in your field .　Don’t you think reading articles and books by experts in your field might make you better at what you do? If you don’t learn more about your profession, then your lack of passion could be a sign that you’re in the wrong field. 　　
I firmly believe that reading has changed my life . I hope these reasons can encourage you to read more books.
【小题1】How many reasons are mentioned in the passage?