Americans love sports--they love to play them, to watch them on television, and to talk about them. But this hobby sometimes has serious results-- at least to the players. For example, when people play tennis, sometimes they hurt their elbows(肘部) and in this way they develop "tennis elbow". Also it is easy to hurt a knee in a football game. These injuries happen while the player is having fun, but they still hurt.

    A few months ago Kathleen Simmons, who loves playing volleyball, hurt her knee in a volleyball game. Her doctor told her that she needed a very difficult operation(手术) or she might not be able to play again. She felt very sad and didn't know what to do.

    Then Simmons learned about "video operation". Simmons found a hospital that was using this new science and went to see the doctor there. The doctors told her the operation could help.

    For this operation, her doctor didn't have to open her knee. Instead he put a very small camera lens(镜头)inside her knee. The lens sent back pictures, which appeared on a television screen. As he worked, he could see the inside of her knee on the TV. With the help of the large pictures on the screen, the doctor knew exactly what to do when he was making the repairs.

    Simmons started walking five days after her operation. Now, six months after her operation, Simmons can do everything she did before her injury. She can play volleyball again."

Information Card

    Do you have a tail? Of course not, we know. But tails are like opinions, actually, everyone has them: fishes, birds, most reptiles, and even some of our closest relatives

    Since tails first evolved(进化) at least 500 million years ago. Geckos (壁虎)use them to store fat. birds use them to steer through the air, But for most mammals (哺乳动物).{#blank#}1{#/blank#}Yet, as you get closer to humans on the evolutionary tree, tails disappear, Gorillas(大猩猩)don' t have them, and neither do chimps(黑猩猩) or any other apes (类人猿) including us, of course, To understand why, take a look at how we walk.

    {#blank#}2{#/blank#}walking like this gives us a huge advantage because unlike four﹣legged animals. which have to pour energy into every step they take, two legs take advantage of gravity(重力),which does some of the work for us. You see, each time we take a step, gravity pulls us forward. The end result is that when we walk, we use around 25% less energy than walking on all fours, and this way of getting around also totally eliminate (淘汰) the need for a tail.

    It's said that you can still see a reminder of a time when our ancient ancestors had one. Just look at a human spine(脊椎).{#blank#}3{#/blank#}That's your tailbone. It's all that's the rest of our tail.

    Now, babies are born with what looks like a tail, but that's not what's really going on. Most often, these tails are actually a parasitic twin(寄生虫). These types of tails usually form as a birth defect(瑕疵).{#blank#}4{#/blank#}

    So the tail of humans has gone, it's the result of evolution millions of years Will humans be much taller, stronger or smarter in the future?

    "I am so busy with my study. I don't even have enough time to have breakfast." said Zhangli, a middle school student. Do you have the same problem   A   Zhangli? However, missing breakfast could raise your risk of heart problem by 87 percent, according to a new study. Researchers at the University of Iowa analyzed 18 years of data on 6,550 people over 40 years old who had no history of heart problems. They were given regular surveys   B   included the question, "how often do you eat breakfast? Most （59 percent）ate breakfast every day, but 5.1 percent never did, 10.9 percent rarely did, and 25 percent would miss for a few days. The team found that①早餐习惯与心脏病风险之间存在明显关联.Those who didn't eat in the morning were up to 87 percent more likely to develop heart problems.

    "It's believed that ②an, important, day, breakfast, the, is, meal, of, but there has been an increasing prevalence (普遍)of missing breakfast over the past 50 years in the United States, with as many as 23.8 percent of young people missing breakfast every day," the researchers said. "However, studies on the health effects of missing breakfast are rare."

    The team pointed out a few factors which could underlie this connection. ③Firstly, those who don't eat breakfast may be more likely to snack unhealthily. Secondly, breakfast may help to balance blood sugar levels and control blood pressure. The findings were published on the American College of Cardiology. Some days later a similar study showed people who missed breakfast and ate a late dinner were less likely to survive a heart attack. And Borja Ibanez, a doctor of medicine, also pointed out those who didn't eat breakfast were more likely to smoke, be lack of exercise, and drink alcohol.

    As for us teenagers, what are your opinions on breakfast? Do you think breakfast is important for us?

    As a teenager, you have many dreams. These dreams can be very big, such as winning the Nobel Prize, or they can be small. You may just want to become one of the ten best students in your class.

    Once you find a dream, what do you do with it? Do you ever try to make your dream true?

    Follow Your Heart written by Australian writer Andrews tells us that making our dreams come true is life's biggest challenge(挑战).

    In fact, everyone can make his dream come true. The first thing you must do is remember what your dream is.

    Don't let it leave your heart. Keep telling yourself what you want. Do this step by step and your dream will come true faster because a big dream is, in fact, many small dreams.

    You must also never give up your dream.

    There will be difficulties on the road to your dreams. But the biggest difficulty comes from yourself. You may think you're not very good at some school subjects, or it is impossible for you to become a writer. These kinds of thoughts stop you from getting your dream, the book says.

    You need to decide what is the most important. Studying instead of watching TV will lead to better exam results, while saving five yuan instead of buying an ice cream means you can buy a new book. As you get closer to your dream, it may change a little. This is good as you have the chance to learn more skills and find new interests.

    Zhuge Liang lived during the Three Kingdoms period. He was famous for his talent and loyalty (忠诚).

    When Zhuge Liang was young, he lived the life of a farmer in Nanyang. Liu Bei visited him three times. Finally, Zhuge Liang promised to do his best to help Liu Bei. A few years later, they built the state of Shu.

    After the death of Liu Bei, his son Liu Shan became the emperor of Shu. Zhuge Liang helped him rule the state. He was the prime minister, but he took care of everything, no matter how small it is. ⑶Because of his hard work, the state became much stronger than before.

    At that time, the state of Wei was an enemy of Shu. Zhuge Liang led the army to fight Wei many times. Before he left, ⑷Zhuge Liang wrote a letter to the emperor. At the end of the letter, he said, "I will give myself to the people and the country until the last day of my life." The war between Shu and Wei lasted for a long time. Finally, Zhuge Liang became sick and died.

It tells us …

   ⑸Zhuge Liang spent all his time working for his people and country. A great man like him will always be remembered.