Hearing is very important to all of us. We can 1 beautiful music, nice songs of birds, the laughter（笑声） of people or other different kinds of 2 in the world with our ears. 3 we must try to protect our ears. The following will tell you 4 protect ears.

    Listening to 5 music a lot can be bad for ears, 6 when headphones (耳机) are used. So 7 the volume(音) when you're wearing headphones or try not to wear headphones. You should give your ears a rest if you like wearing headphones. Before swimming, remember 8 earplugs （耳塞) into y our ears or wear a swim hat to stop water 9 into your ears.

    If you are going to a concert, wear earplugs to protect your ears 10 the terrible music! 11, special ear can be made for you if you go to concerts a lot or if you are a musician yourself.

    See a doctor if your ears 12. 13 some medicine if the doctor asks you to do so. 14 the advice above now and you won't be saying “what?" when you are getting 15.

    There are many kinds of pollution around us,1 air pollution, soil pollution, noise pollution and light pollution. They are bad 2our health in many ways.

    Burning gas, oil and coal creates air pollution. It can cause sore eyes and 3 problems.

    With the increase of pollution and the 4 of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many chemicals in the fields. They destroy the soil. So soil pollution has become serious.

    Noise pollution can make people 5 For example, people may lose their hearing if they work in a 6 place for a long time. Too much noise can cause high blood pressure 7

    Working for a long time in strong, changeable light 8 cause some kind of illnesses. It makes people feel 9 and is especially bad for the eyes.

With 10 pollution, our planet will become greener and our health will be better. Let's be greener people.

    Four students are talking about the future after class.

    “In 2050, our life will be much1than it is now. The sky is bluer and water is clearer. We can2the fresh air every day. Humans and animals3the world peacefully. ” says Zhang Tao, full of hope.

    Wang Yan thinks that it is not a4to travel to the moon for a holiday. We eat healthy food every day. At that time, everyone will enjoy a5life.

    Li Yuan Yuan believes that people will have more free time because robots (机器人) will be very popular and will do many things6people. And we will build new7on other planets (星球). Maybe we can chat with each other in our new homes.

    Zhao Kai thinks that no animals will die out because of cloning (克隆). There will8no pollution (污染). The whole world will be one big9. As time10, we'll live a much easier and better life.

    Their teacher Mr. Chen tells them to work hard for their dreams and future. “Nothing is impossible. ” says Mr. Chen.

    It's March 12^th. Li Li and Lin Tao are digging on a hill nor far from their school. In China, people across the country plant trees1on this day.

    The idea of planting trees was first put forward in 1911 by Sun Zhongshan, the great2 in China's history. He said more trees were needed as a3against flood(洪水)and drought. In 1915, April 5^th was named as Tree Planting Day. Then, in 1979, the day4to March 12^th, to 5the date on which Sun Zhongshan died.

    "Everyone has heard of the Great Wall of China," says Li Li. "But have you heard of the Green Wall of China? That's the biggest tree planting 6 of all. "The Gobi Desert in the north of China was 7every year. So in 1978, a tree planting project was started to 8 Gobi spreading. The government and local farmers have been planting millions of trees to build a great green "wall" along the edge of the desert.

    "Tree planting has become a tradition in China now," says Lin Tao. "Almost everyone does it on March 12th. Many people also plant a tree on a 9 day. My parents planted a tree when started school. And my cousin planted 10 on his wedding (婚礼) day. We do it for the environment and for ourselves."

    The Artic Region (北极地区) is one of the coldest place in the world. It is cold all year round. Spring comes from May to June. The ice and 1 begin to melt (融化). The plants begin 2 and the animals look for food. The summer comes from July to August. The temperature is summer can get only -8℃. It should be 3 warmest season here. Autumn comes from 4 to October and it lasts short. 5 comes quickly from November to April next year. Winter is the 6 and coldest season of a year. And the Artic Region is filled with ice and snow everywhere. At this time there is no 7. So it looks like night in winter.

    Are there any people living in such a 8 lace? Yes, they are Eskimos (爱斯基摩人). It is 9 for them to live there, 10 they live happily with a long history.

    Can you imagine that we could build a beautiful city with rubbish? Maybe you will think it is1. However, it can be true! Nothing is a waste if we have a creative mind. Let me show you something about 2rubbish.

    Sometimes we can see tons of rubbish in the streets, on the roads, near the buildings... here and there.  Many large cities became so ugly 3 it. Nobody likes rubbish, but in fact, some rubbish can be used again. All of us want to solve the problem, we must do something to 4 rubbish. We should take action from now on. 5, some good things will not be wasted.

    Do you often throw away things you don't need any more? Have you ever thought about how these things can actually be put to good use? For Example, when a car gets too old, it may not run any more. But we can use the metal of the car to make something else. When a bottle is empty, it 6 as waste. You don't know bottle glass can be made into sand and used to build streets. Rubbish7food can be changed into fertilizer to make plants grow better. It is cheap and safe. And other rubbish can also be used to make building blocks. Now, 8machines are designed for that.

    9, people will watch films in a beautiful cinema which is built out of rubbish. Besides buildings and roads, cities may be made from rubbish. But so far, building beautiful cities made from rubbish is only 10.