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The environment is becoming worse and worse . There are? many k_1.____ of pollution that I worry about. The most terrible two are w__2._? pollution and air p_3.______, because people can’t live healthily with dirty water and polluted air. Animals can’t live in the world ,either. More and more people are becoming ill b _____4.__ of polluted air. I think factories shouldn’t? pour dirty water i_5._____ rivers directly or produce so much waste gas. We’d better go on? foot or by? bike? i____6.___ of by car. Finally, everyone must pay attention to r___7.___ pollution. If everybody makes so m__8.___ rubbish , one day we may live in a world which is full of rubbish. H__9. frightening it will be ! We should take a____10.__ to make our world cleaner and more beautiful.

阅读理解

　　The moon looks bigger than the stars at night. But in fact, it is smaller than any of them. The moon looks bigger to us because it is nearer to us than any star. The moon goes round the earth. The moon is a round ball and looks beautiful. Don't you think so?

　　Now people know quite a lot about the moon. There is no air or water on the moon, so there are not any trees or animals, or people on the moon. The moon gets its light from the sun, but some places on the moon are quite dark. The days on the moon get hotter than boiling(沸腾的) water. The nights get colder than the North Pole(北极) on the earth. The things are getting much lighter on the moon than on the earth. And you can jump higher on the moon than on the earth.

1．We can see the moon a ________n________.

2．The moon looks b________ than the stars because it's much n________ than them.

3．There is no a ________ or w________ on the moon, so people can't live there.

4．The moon is very h________ in the day and it's very c________ at night.

5．The moon goes round the e________ and the earth goes round the s________.

　　Air is all around us. It is around us a______ we walk and play.From the time we are born air is around us on every side. When we sit down, it is around us. When we go to bed, air is also around us. We live in air.

　　All l______ things need air. We can live without food or water for a few days, but we can't live for more than a few minutes w______ air. We take in air. When we are working or running we need m______ air. When we are asleep, we need less air.

　　We live in air, but we can't see it. We can only feel it. We can feel it when it is moving. Moving air is called wind. How can we make air moving?

　　Here is one way. Hold an open book in front of your face. Close it quickly. What can you feel? W______ you feel is air.