C

    Many scientists think that life may be very different by 2050.

    First of all, TV might not be used by 2050. People will choose music, films, programs and newspapers on the computer. And they can smell(闻) and touch things on the Internet. That sounds really interesting.

    Water pollution(污染) will become the most serious problem by 2050. Human beings will need more water than today. There will be less fresh water on the earth.

    Cars will not only run on the land but also fly in the air by 2050. That can help to alleviate the heavy traffic. There won't be any accidents, because computers will control the traffic. What's more, the speed of the plane will be much faster. It'll take only 2 hours for people to fly from Los Angeles to Tokyo.

    Robots will become very popular by 2050, because they don't ask for money and can work 24 hours a day. We'll see robots everywhere — factories, schools, hospitals, shops and homes.

    By 2050, medicine will be improved a lot. Cancer and AIDs won't be serious diseases.

    Everyone knows that exercise is important. We all need to exercise. There are many ways to exercise. You can walk, run, swim, skate, or play ball games, but you should remember to exercise in the right ways.

        ①    Before you do any exercise, make sure to warm up for at least five minutes. During warming up, you should extend all parts of your body.

        ②      It's best to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for you.

        ③    There are a lot of equipments (设备) at fitness centers. The equipments will help exercise your arms, legs and other parts of your body to make you fit. Some people buy equipments for their homes. But it is very expensive.

        ④     If you get hurt when you are doing exercise, don't play again until you are well.

Secrets of Top Students

⑴Example One:

"If don't understand what my teacher is explaining in science, I ask him to say it again," says Anna Lee. "I find that asking more helps me a lot."

⑵Example Two:

"When a teacher asks us to do a lot of homework," says Dave Roman, "I will draw up a timetable and plan to do it little by little, so it isn't so tiring."

⑶Example Three:

One student put a vocabulary list on the wall of the bathroom. He learned a new word every day while brushing his teeth. Another student used the time to remember biology terms while practicing running.

⑷Example Four:

In high school, Mike played football, painted and was in the band. "I was so busy that I couldn't waste time looking for a pencil or missing paper. I kept everything in order," he says.

⑸Example Five:

Christi is an excellent student at the university. If her math teacher asks her to do five problems, she does ten. If the history teacher asks her to read five passages, she reads ten, "parts of learning is practicing," she says, "and the more you practice, the more you learn."

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Dear Xia Yu,

    Do you know that there are two special days for parents in America? One is Mother's Day on the second Sunday of May, and the other is Father's Day on the third Sunday of June. On these two days, American children often give gifts to their parents or take them out for lunch or dinner. Common gifts are flowers and cards for mothers and shirts or ties for fathers. I heard that it is becoming more and more popular to celebrate Mother's Day and Father's Day in China. I wonder if children over there also give similar gifts to their parents. I believe that there, are many ways to show our love. Actually, we don't have to spend a lot of money. It is also a good idea to help parents to do something instead.

—June

Information card

    Why do people cry? Scientists say the body produces tears because they need them. One kind of tears is for the eye, the other is for the heart. They both work as cleaners. If something else like dust(灰尘) gets into your eye, tears also come into the eye to clean it out. If you are hurt by something, your strong feelings produce some poisonous chemicals(毒素) in your body, and at the same time, tears come out with them. If these poisonous chemicals are not cleaned out of your body as soon as possible, they will do harm to the heart sooner or later.

    In the United States men have heart problems more often than women do. Doctors say heart problems have something to do with the pressures(压力) of living and working now. Perhaps men suffer more from these illnesses because they do not cry enough. They need to cry more.

    In fact, you can find many ways of reducing the pressures to keep fit. Crying is a natural and physical one.