Ma Hua graduated from Fudan University. He had a good career in IT and a great life in Shanghai, but he felt there was something missing from his life. He wanted to help others to improve their lives, so in March 2013 he gave up his job. Then he moved to south-west China to do voluntary work in a village primary school.

    He soon became an important member of the local people. In his class, he painted pictures on the walls to help students remember English words. He also spent his money building a playground for the children.

Ma Hua quickly got used to his new life. He got great satisfaction(满意) from his work and felt very happy, even though life there was hard—he had to melt(融化) ice for water and grow vegetables for food. When he was free, he wrote poems describing the peace and beauty around him. Sometimes he would go walking in the mountains and enjoy the beautiful view. Sadly Ma Hua was killed in a car accident in July 2014 at the age of 31. His death was a great loss to all those who knew him, but it is a comfort to know that he lived happily, doing what he loved and enriching the lives of others.

    The Smiths live at 87 King Street. In the morning, Mr. Smith goes to work and the children go to school. Their father takes them to school every day. Mrs. Smith stays at home every day. She does the housework. She always eats her lunch at noon. In the afternoon, she usually sees her friends. They often drink tea together. In the evening, the children come home from school. They arrive home early. Mr. Smith comes home from work. He arrives home late. At night, the children always do their homework, then they go to bed. Mr. Smith usually reads his newspaper, but sometimes he and his wife watch television.

    More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment. Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can take you almost anywhere, and there is no oil cost!

    Get on a bicycle and ride around your neighbourhood. You may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and benefit(受益）from the enjoyable exercise without polluting the environment. You don't even have to ride all the way.

    Folding(折叠）bikes work well for people who ride the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can take a common bike with you when you fly, too. But be sure to look for information by getting on airline websites. Not all airlines are bicycle-friendly to travelers.

    Health benefit of Bicycling:

    ⒈It helps to prevent heart diseases.

    ⒉Bicycling helps to control your weight.

    ⒊A15-minute bike ride to and from work three times a week burns off five kilos of fat in a year.

    ⒋Bicycling can improve(改善）your mood. Exercises like bicycling has been shown to make people feel better, more relaxed and self-confident.

    ⒌Bicycling is healthier than driving.

    Have you ever counted the number of digits (数字) in your mobile phone number? Your number has 11 digits. You may sometimes find it hard to remember your number. That's because China has the longest mobile phone numbers in the world. Why is that?

    The 11 digits can be divided into three parts. Each part has a different meaning. The first three numbers tell you which mobile phone service provider (提供者) you are using For example, 135 is for China Mobile Communications Corporation and 188 is for China Unicom. The fourth to the seventh digits tell you where the number is registered (注册). And the last four digits are random (随机的).

    The main reason for using 11 digits is that we have the largest population in the world. We once had 10 numbers. But as our population grew, there were not enough numbers for us to use. So we began to use 11 digits starting from 1999. Eleven digits can be used to make tens of billions of mobile phone numbers. That's enough for each person to have seven or eight phone numbers to use in China.

    And mobile phone numbers can be recycled. Usually, the service provider will reuse a canceled number after three to six months. If you call a number that you haven't contacted (联系) for a long time, you may find that its owner has changed.

    Besides China, Britain and Japan also use 11-digit mobile phone numbers. But their numbers always start with 0. So they cannot create as many numbers as we can. Countries like the United States, Australia and India use phone numbers with 10 digits. Canada's mobile phone numbers are perhaps the shortest in the world: they use seven digits.

    Bullying(欺凌)has become a big problem in schools, which has caused serious attention of society. To know what causes bullying will help to stop it. There are many① factors that involve(陷入) a child in bullying：②Parents are busy with their work, leaving their children_ alone or with the grandparents. They don't get love or warmth from their parents. Children who are bullied are easier to bully others. Some children bully others to get respect(尊重)from other kids. Teenage girls bully to win attention or love from someone. Movies and video games also play a role in a child's bullying action.

    Parents, teachers, schools and society should work jointly to stop bullying. As students. ③you should respect others and not make fun of their weakness. If you are bullied, you have the right to tell your parents or teachers about it first and ask them for help.

    Dinosaurs(恐龙)once lived on the earth for a long time. They suddenly disappeared millions of years ago. What happened to them? That's still a mystery. People never stop searching for the answer.

    Some US scientists say it is because there were not enough male(雄性的)dinosaurs. They got this idea after researching crocodiles(鳄鱼).

    Mother crocodiles lay eggs and later baby crocodiles come out. The local temperature decides the sex(性别)of the baby crocodile. When the eggs are at a temperature of 26℃ to 30℃,the babies are all girls; when the temperature is 30℃ to 34℃,there are both boys and girls; when it is 34℃ to 36℃, only boys are born.

    Dinosaurs' babies also came from eggs. So scientists have given us a new picture: millions of years ago, it suddenly became very cold. Almost all dinosaur babies were girls. There were fewer and fewer male dinosaurs. Mother dinosaurs could not give birth to more babies. Finally, these powerful animals disappeared.