The earth is our home. We must take care of it. Life today is easier than it was ____1____ years ago, but it has brought some new problems. One of the biggest problems is pollution（污染）. We can see it, smell it, drink it and even hear it.

　　Man has polluted the ____2____. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so ____3____ people. When the land was used up（用光）or the river was not clean in a place, man went to ____4____ place. Now man is slowly polluting the whole world.

　　Many countries don't let people burn（燃烧）____7____ for air in houses and factories in the city. Pollution by is now the most dangerous kind of air pollution. It's caused by（由……引起）heavy traffic．People say it's ____8____ to ride bikes. When you are riding, there is not pollution. But even in developed countries, most people don't go to work by bike. It's not because bikes are expensive or people are tired ff they ride to work. It's because the number of cars on the roads becomes larger. So more people ____9____ their bikes and go to work by ear, then things are getting worse and worse. We should have special（特别的）roads only for bikes and make it ____10____ difficult and expensive for drivers to take their ears into the city that they will go back to using their bikes.

　　There is (9) in education than just learning facts. We go to school above all (10) how to learn, (11) when we have left school we can go on learning. If a man really knows (12) , he will (13) be successful, because whenever he has to do (14) he will quickly teach (15) how to do it in the best way. The uneducated person, on the other (16) , is (17) unable to do it, or (18) it badly. So the purpose (目的) of school is not just (19) languages, geography, science etc. , but to teach pupils the (20) to learn.

　　 (5) many schools there (6) computer classrooms, computers are very 7 .For example, students can (8) their maths work (9) a computer. The computer (10) questions on the screen（屏幕）in front 11 the students and the (12) answer (13) their key boards（键盘）.

　　Students can also learn a foreign language(外语)with a computer. The computer (14) us sounds in pronunciation（发音）, grammar and the right use of words and phrases.

　　Students know a lot (15) computer now. For example, they can use Basic to make up useful programmes（节目）.They can use WPS to write compositions.

　　I wonderful if there is any girl or boy who does not like to see a rainbow（彩虹）in the ___1___ It is so beautiful.

　　 A rainbow is not a thing which we can feel with our hands as we can feel a flower. It is only the effect（效果）of light shining on raindrops. The raindrops catch the sunlight and break it up into all the wonderful ___6__ which we see.

　　It is ___7__ a rainbow perhaps because it is made up of raindrops and looks like a bow（弓）.

　　That is ___8___ we can never see a rainbow in a clean sky. We see rainbows ___9____ when there is rain in the air and the sun is shining brightly through the clouds. Every rainbow has many colors in same order（顺序）. The first of the top color is always red, next ___10___ orange, then green, and last of all blue. A rainbow is indeed one of the wonders of nature.

　　__1__ July 21,1998, a bad accident __2__ to Sang Lan, a famous Chinese sport girl. After that she could only move her hands and arms a little, and __3__ stay in a wheelchair. However, she __4__ lose heart, she __5__ special exercises every day. It was very hard on her, but people could still see her sweet smiles and cheerful eyes. She became a fine example for people __6__ have had bad accidents or bad luck. When she was in hospital, many famous people visited her. Celine Dion asked her __7__ up the good work. Leonardo encouraged her not to give up and keep on __8__ Reeve told her never to think about the accident again. He believed that she could walk again in a few __9__ time. Sang Lan also kept telling __10__,“I can do it. I can do it. I can do it !”