Your body is special – no two people in the world are alike, Although you are different from everyone else, you have exactly the same body parts as the people around you, doing different jobs that keep all of us alive.
    What is inside my head ?
    Your head houses the most valuable part of your body – your brain. As you are reading, your eyes send pictures to your brain which makes meaning from what you see. Your brain helps you to remember and think, and makes sure your body is doing what it should.
    What is my skin(皮肤) for ?
    Your skin covers your body. In most parts of your body, the skin is just as thick as half a centimeter. If you have your skin cut, it will have a quick cure and stop viruses from getting into your body. Your skin also helps you feel the heat and coldness of the environment around you. Hair grows from inside the skin. When you feel hot, extra heat comes out through your skin. As a result, your body temperature drops.
    How do I move ?
    Muscles(肌肉) are found in most parts of your body. They work with your bones to help you move – whenever you cry or smile, eat or speak, walk or dance, etc.
    Why do I breathe ?
    Your body needs to take in oxygen from the air and give out the unwanted carbon dioxide in the body. When you breathe, air comes through your nose and mouth into your lungs(肺) where oxygen flows to different parts of your body.
    What makes me sneeze ?
    When dust or a strong smell gets into your nose, you sneeze. This is the way your body cleans up the dust in your nose. Your lungs push out the air and try to clear your nose.
    What does my heart do ?
    Your heart is a very special muscle. It is slightly bigger than your fist (拳头) and grows bigger as you do. If you place your hand on your heart, you will feel your heart beating which forces blood to move around your body.

    Do you often think of life in the future? Will we study at home? Will we have robots? Will we fly to the moon easily? Everyone may have his or her views about that. Life in the future will be very different from life today. Between then and now many changes will take place, but what will the changes be?

    There will be changes in our food. Maybe no one will eat meat. Instead, people will eat more fruit and vegetables. People will stay away from junk food. Maybe people will be healthier.

    Computers will be small and useful. Maybe we will even put the computers into our pockets(口袋). There will be at least two computers in every home. And computer studies will be one of the most important subjects at school.

    Work in the future will be different, too. Dangerous and hard work can be done by robots. People will work fewer hours than they do now. And they will have more free time for sports, watching TV and traveling.

    People have always wanted to know what our future will look like. Go on reading this text, and you will know what will happen in the next fifty years.

    How can we know what the future will look like? To be able to understand the future, you have to know the past, what has taken us to where we are today and what has changed along the way? The world has changed a lot in the last 150 years, but people are driven by the same basic needs as they were 150 years ago. Will this change in the next 150 years? No.

    What inventions have really made a different in the last 150 years? In the past years, the inventions that have changed most people's everyday life are telephone, radio, television, computer, the car and the internet. Then we of course have a lot of inventions that have made life easier, like new medicine, faster cars, trains, etc. In general, people have been working hard in the last 150 years to make inventions that will make the world a better place. Since there is still much to do in the area, this will be important for at least the next 150 years.

    Why do we need to guess the future? Guessing the future is important for two reasons: First, we need to start to think about what kind of future we would like for ourselves and our children. And then we need to know what decisions we need to make today that will give us the best future.

    When we talk about the universe, we mean not only the earth, the sun and the moon, but also the stars and space between them. There are millions of stars in our sky. The sun is one of them. Around it there are eight big planets moving, including the earth. The moon is our nearest neighbor in space. If you look at the sky on a clear night, it is possible to see about 3, 000 stars. They look small, but they are really very big hot balls of burning（燃烧着的）gas. Some of them arc huge（巨大的）, but others are much smaller like our planet Earth. The biggest stars are very bright, but they can only live for a short time. Every day new stars are born and old stars die.

    All the stars are very far away. The light from the nearest star（except the sun）takes more than four years to reach the earth.

    Hundreds of years ago, people used stars, like the North Star, to know which direction（方向）to travel in.

Today you can still see that star.

    Try to imagine a life without a memory. It would be impossible. You couldn't use a language, because you wouldn't remember the words. You couldn't understand a film, because you need to hold the first part of the story in your mind in order to understand the later parts. You wouldn't be able to recognize anyone - even members of your own family. You would live in a present forever. You would have no past and you wouldn't be able to imagine a future.

    Human beings have amazing memories. Besides all our memories about our own lives, we can recall (回忆) between 20,000 and 100,000 words in our own language as well as possibly thousands more in a foreign language. We have all kinds of information about different subjects such as history, science, and geography, and we have many skills such as driving a car or playing a musical instrument. All these things depend on our memory.

    How well you remember things depends on many different factors. Firstly, some people have better memories than others, in just the same way as some people are taller than others. Secondly, research shows that, you can store different things in different parts of the brain. Ideas, words, and numbers are stored in the left—hand side, while the right-hand side remembers pictures, sounds, and smells. In most people, one side of the brain is more developed than the other, and this may explain why some people can remember people's faces easily, but can't remember their names.

    Many people drive their cars to school or work now. So there are lots of cars on the streets. Sometimes, it's not easy for you to get to school or work on time(准时). Then you want to take a plane to school or work. Can your dream come true? Yes!

Four people in Germany(德国) make a new plane—Lilium Jet. It doesn't look like a plane but an egg. Many people think it looks funny. The nice "egg" can take two people and "run" about three hundred kilometers an hour.

    The Lilium Jet is not very big. So it doesn't need an airport(机场). A small place is OK.

    Some people also call the Lilium Jet "a flying car". It's not difficult for you to learn to drive it. You can drive it like driving a car.

    Maybe you can buy one in 2018 if you like it. I'm sure your trip to school or work will be great.