In the past, man did not have to think about the protection of his environment. There were not many people on earth, and natural resources seemed to be unlimited.

Today, things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive.

Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we continue to use bigger and more powerful machines to cut down more and more trees.

We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this.

We know, too, that if the population of the world continues to rise at the present rate, in a few years, there will not be enough food.

What can we do to solve these problems?

If we eat more vegetables and less meat, we will easily get more food. Land that is used to grow crops can feed five times more people than land where animals are kept.

The world population will not rise so quickly if people use modern methods of birth control.

Finally, if we educate people to think about the problems, we shall have a better and cleaner living place in the future.

In the past, man did not have to think about the protection of his environment. There were not many people on earth, and natural resources seemed to be unlimited.
Today, things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive.
Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we continue to use bigger and more powerful machines to cut down more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this.
We know, too, that if the population of the world continues to rise at the present rate, in a few years, there will not be enough food.
What can we do to solve these problems?
If we eat more vegetables and less meat, we will easily get more food. Land that is used to grow crops can feed five times more people than land where animals are kept.
The world population will not rise so quickly if people use modern methods of birth control.
Finally, if we educate people to think about the problems, we shall have a better and cleaner living place in the future.

Look carefully at the back of a California state quarter. A man with a walking stick is pictured there. A bird called a California condor(大秃鹫)is flying overhead. Who is this man, and why is he so important that he is featured(处于显著地位)on the back of a coin?
The man on this quarter is John Muir. Even as a child, Muir loved watching nature. As a young man, he spent much of his life exploring the beauty of the wilderness. He walked more than a thousand miles across the country, through fields and woods. John Muir liked writing about the places he visited, describing their beauty.
Muir also wrote about problems. In order to create more farmland for sheep and cattle, many trees were being cut down. This made Muir unhappy and worried, because he knew that trees were important to forests and to the animals that lived in them．Muir believed that nature should be conserved(保护)instead of being changed by human beings. He wrote articles in magazines and newspapers to spread the word about conserving forests. Soon, others began to listen.
Muir wrote letters to important people, such as President Theodore Roosevelt. The president admired Muir’s love for nature. When Roosevelt came to visit Muir in California. Muir convinced(说服)the president to go camping with him for three nights under the trees so they could talk about conservation. Later, President Roosevelt set aside 148 million acres of land for national forests and established(建立)five national parks. National parks are large areas of land that are protected from development. This means that people cannot build homes or businesses there. One of these parks is Yosemite National Park, the area that is featured on the back of the California quarter.
Though it has been almost one hundred years since John Muir died, people continue his work today. His work as a conservationist helped us to see the beauty of our natural world. John Muir made us understand the importance of protecting our earth and our resources---then, now, and for the future.
【小题1】Why did President Theodore Roosevelt visit John Muir?

It’s very important that we all recycle (再利用). In nature, everything ___26___ again. For example, when an animal dies, it becomes ___27____ animal’s food. Nothing is wasted. But humans have created things like plastic bags ___28___ can’t be broken down by nature. Our rubbish kills animals and __29___ water and soil. ___30___ we continue making too much rubbish, the problem will only get worse. If nature can’t reuse the rubbish, we must recycle __31__.

We should clean up the rubbish we’ve made because nature can’t.

Recycling is also the right thing to do for another reason. The earth is rich in natural materials like water and trees, __32 __ these materials are not endless. We use up our natural materials much _ _33 __ than the earth is able to reproduce them. For example, each year we cut __34 __ more that 6,000 square miles of forest. But it takes an average of 25 years for a new tree __35__.

Recycling can help us save the earth, so let’s take action right now.

1.A. use                B. using               C. is used             D. used

2.A. another             B. other               C. others              D. the other

3.A. who               B. which               C. how               D. where

4.A. pollutes            B. polluted              C. polluting           D. is polluted

5.A. When              B. Whether             C. Why               D. If

6.A. them               B. their                 C. it                 D. itself

7.A. but                B. so                   C. and               D. or

8.A. fastly              B. fast                  C. taster              D. fastest

9.A. out                B. down                C. in                 D. up

10.A. grows              B. for growing           C. growing           D. to grow

Today the world's economy is not going well. Crisis（危机）is to our life just like to our body. Just as fatal(致命)disease can destroy our body and sometimes even put an to our lives, so does crisis knock us down so hopelessly that we might never have chance of standing up again．Just take my own country for instance．Of course，in the twenty years，our economy has gained the highest speed．But haven't we paid too much?Our rivers are ．Our natural resources are becoming and fewer．Is it worthy of it?

Crisis sometimes contributes(贡献)to our life treasure in a way that few can imagine．It can make us strong enough to face ourselves when we feel weak．Eric，my uncle is an . He had hard time in his going through such a fatal disease that he had never thought he survive. ，he was saved by doctors．Ever since then he regarded his life as a second given by God and has been so grateful to the world that he his best to do what he could. And now he is living a and successful life．

1.A. illB.illnessC.sickD.patient

2.A．end B.finishC.overD.ending

3.A．last B.nextC.pastD.during

4.A．pollutionB.pollutedC.pollutingD.pollute

5.A．1essB.fewC.littleD.fewer

6.A.exampleB.case C.such as D.for example

7.A.childhoodB.child C.children D.child time

8.A.Luck B.Lucky C.Luckily D.Luckly

9.A.tryB.do C.tried D.does

10.A．happyB.happiness C.pleased D.pleasure