Many kids want to help keep the environment clean but don't know where to start. 1 , even the simplest everyday activities can make a real difference to the environment. Here is how:

 Don't litter. Litter can  2our water and that could do harm to us and to wildlife.

 Recycle bottles, paper and plastic. This is a good3to develop and can really make a difference.

4 turn off lights and electronic devices（设备）when they are not being used.

 Use your 5or walk to nearby locations rather than riding in a car. Encourage your friends and family to 6the same.

Don't throw your old clothes or toys away. Give 7 to a local charity（慈善组织）or a friend that may need them.

8 wasting plastic bags by bringing your own reusable cloth bags to stores.

 If you see litter,  9  .

By following these tips and using them in your everyday life, you will make the world a 10 place. It's never too late to start, and what better time is there than right now?

    The world's population is larger and larger. There will 1 much more people next century. The earth will be more crowded and there must be a little room 2 each person. Perhaps there will be 3 room only on the earth a few centuries later. That will be serious to humans.

    So human are 4 of a good way to solve the problems.

    The moon is the 5 that is nearest to us. Maybe man will 6 on it some day. According to the scientists, studying, we know that there is no air, no plants, no water and no life there. So scientists are doing experiments 7 many ways. They 8 solve a lot of problems 9 humans can live on the moon. I'm sure the dream must 10 in the future. Maybe it is in the next century.

Hands play an important part in our daily life. But do you know which of your two hands you use more? Very few people use both hands equally well. Most of us are right-handed. Only about five people out of a hundred are left-handed. New-born babies can take hold of things with either of their hands, but in about two years they usually use their right hands. Scientists don't know why this happens.

Monkeys are our close relatives in the animal world. Scientists have found that monkeys like to use one of their hands more than the other, but it can be either hand. There are as many right-handed monkeys as left-handed ones. Next time you visit a zoo, watch the monkeys carefully, you will see that some of them will use their right hands and others will use their left hands. But most of the people use their right hands better and this makes life difficult for those left-handed people. We live in a right-handed world.

    The undersea world is very beautiful. Now more and more people want to 1 in the water to find the secret there. Scuba diving (水肺潜水) is a new sport today. It can take you into a wonderful undersea world.

    If you are lucky, you will 2 find many strange animals in the sea. Some are as 3 as a school bus. Some are so tiny that you may not  4 them at all.

    During the day, there is enough 5. Everything is blue and green. When fish swim nearby, you can catch them with your hands. When you have bottles of air on your back, you can stay in 6 water for a long time. However, you can't dive too deep. And you must be very 7 when you are in deep water, because something dangerous may happen unexpectedly.

    The deep sea is not an easy place to live in. It's cold, and it's 8 too. The deeper it is, the less sunlight there is. At about 3,000 feet, there is no light at all.

    Besides the cold and darkness, deep-sea animals face a third 9 —other animals. Animals eat! Many animals eat plants. However, some animals eat 10. This means these sea animals have two big jobs. They need to find animals as food, and they have to try not to become other animals' meal.

    Arctic fox (北极狐) is a kind of small fox that lives in the Arctic. It grows about 50 centimeters long, not including its tail, 30 centimeters tall and 1 from 3 to 7 kilos.

    The Arctic foxes are white or blue 2 color. The white ones are white in winter,3 gray-brown in summer. The blue ones are blue-gray all year round. The Arctic foxes have long thick hair 4 is called fur. And the long fur covers their whole bodies, including both their cat eyes and rabbit feet, to keep them 5in the low temperature in the Arctic.

    The Arctic foxes feed mainly on birds, birds' eggs and other small animals. Teamwork is the way they look for food, and they don't like to do that 6.

    Baby Arctic foxes are very lovely. They don't.7their eyes until a week after their birth. For the first half of the year, their parents offer them food. They begin to 8food on their own when they are about six months old. The next year they can live alone.

    Today,9the Arctic foxes is becoming smaller and smaller, because people kill them for their 10to make beautiful coats for money. Something must be done to protect the Arctic foxes.