Dave is my friend. His family is rich. His parents always give him lots of pocket money. But Dave thinks his parents work very hard and it's not easy for them, so he always tries his best to save money. He has some good ways to do it.

    Dave likes reading. He has lots of books. He tells me he often buys books online, because they're cheaper. And when he has free time, he often goes to bookstores or libraries to do some reading.

    Dave has a bike. He usually goes to school by bike instead of taking a bus. Sometimes when it rains or snows, he walks. These two ways help Dave keep healthy and save some money.

    Dave brings a bottle of water to school every day. When other students drink juice, he enjoys his water. He thinks water is the cheapest but the best drink.

    Some students think Dave is mean. But I don't think so. I think he is right. What do you think of him?

    A survey of young people around the world looked at their ideas of today's teenagers．It shows how different they are to those of their parents and grandparents．The survey wanted to try and understand the next generation （ 一 代 人 ） of adults better and these are some of the results．They show that there are many more （A） similarities between young people around the world than differences．

   ①   

    Gap years （间隔年） between school and university are becoming more and more common．Today's teenagers want to travel to different countries and experience different cultures．They regard this as an important part of their character development．

   ②   

    For most teenagers，family and friends are the most important side of life．According to the survey，60 percent of British young people said their relationship with their family was of the highest importance to （B） them ．

   ③   

    75percent of teenagers in Western Europe expect to have enough money to live when they are adults．They are a happy generation．Eight out of ten believe they will have a good profession with a job they enjoy．They also expect that they will be happy and healthy．

   ④   

    Young people now are hungry  for all kinds of information on mass media.57percent of teenagers in the UK read at least one magazine every week，which is one of the highest totals in the world．

    A new research on students' sleeping habits says that more than 70% of students do not get enough sleep.

    Researchers found that primary school students get 9 hours and 10 minutes of sleep a night, junior high school students get 8 hours and 6 minutes, and senior high school students get 7 hours and 9 minutes. None of those hours are enough for each group. Not enough sleep can cause many kinds of problems in children and teenagers.

    In 2007, Shanghai Municipal Education Commission asked primary and middle schools in the city to adjust their timetables so that students could get more sleep. Two years later, a research found that students at schools that adjusted their timetables got more sleep than in 2005.

    The researchers hope that the government will take measures to make students have enough sleep. Students in other places may even less sleep than those in Shanghai.

    Science is about asking questions. A science fair project is an experiment or a research effort. Through such a project, you learn how to find problems and how to solve them.

    A science fair project includes at least three parts: the display poster board, the exhibit (展览) materials, and the written report.

    The display poster board

    The display poster board is very important. It is what people first see. As a kind of "advertisement" for your project, it must be carefully designed. Usually, the board should include the key points of your research.

    The exhibit materials

    These materials can be the most exciting part of any science project. They usually include the items you used in your project. Together, they tell a story. People should be able to understand your project on their own through these materials.

    The written report

    No matter what you do, you need to record your findings in a written form. The written report should include all the information you collected while you were working on your project. The report may also include your understanding of the topic you choose.

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    Great white sharks (鲨鱼) in the Pacific Ocean. Wildebeest (角马) in Africa. Arctic terns (北极燕鸥) in the Atlantic. At first, these animals seem quite different. One swims, one walks, and the other flies. But they all have one thing in common. They all migrate (迁徙).

    Some migrating animals move to a place with better temperatures. Some go to find food or water. The groups travel as one, but during the trip, they face many different challenges.

    One challenge is distance (距离). Some migrating animals take very long trips. For example, one great white shark swam from Australia to South Africa and back. In nine months, it swam about 20, 000 kilometers!

    Another challenge is finding enough food or water during the journey. For example, each Mali elephant needs over 200 liters (升) of water each day. To get this, they need to go from one waterhole to another.

    Besides, migrating animals have to keep away from other animals because they want to eat them. The zebra (斑马) has to avoid lions. Traveling as a group helps keep them safe. When one zebra is in trouble, the other members make a circle around it.

    By working as a group, migrating animals travel to live better lives.

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    A man stopped at a flower shop. He wanted to order some flowers for his mother for her birthday.

    As he got out of his car and walked to the shop, he saw a little girl sitting in the corner. The girl looked quite sad. He asked her what was wrong. The girl said, “I want to buy a red rose for my mother, but I don't have much money. A red rose is two dollars.”

    The man said, "Come with me. I'll pay for the rose. "He bought the little girl a red rose and also ordered his mother some flowers. Then the girl told the man where she would go. It's a cemetery(墓地). Her mother died 20 days ago.

    Later that day, the man took his flowers and drove a long way to his mother's house. He wanted to give the flowers to his mother in person.