In the past, man did not have to think about the protection of his environment.  There were few people on the earth,  and natural resources（资源） seemed to be    26  .

     Today things are 27 , the world has become too   28   . We are using up our natural resources too quickly, and at the same time we are  29  our environment with dangerous chemicals. If we continue to do this,  human life on the earth will not   30  .

Everyone 31  today that if too many fish are taken from the sea, there will soon be none left.  Yet, with modern fishing  32   , more and more fish are caught.  We know that if too many trees are cut down,  33 will disappear and nothing will grow on the land. Yet, we  34  to use bigger and more powerful machines to 35  more and more trees.

    We realize that if rivers are polluted with waste products from factories, we will die. ___36,    in most countries wastes are 37   put into rivers or into the sea, and there are 38   laws to stop this. We know, too, that if the   39  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  40  these problems ?

    If we eat more vegetables and less   41 , there will be more food available for everyone.  Land that is used to grow crops   42  five times more people than land where animals are kept.  Our natural resources will  43  longer if we learn to recycle them.  The world population will not rise so quickly if people use modern methods of birth 44    .

Finally, if we educate people to think about the problems, we shall have a better and cleaner      45   in the future.

1. A. beautiful      B. unlimited       C. rare       D. valuable

2.A. common    B. the same     C. changeable     D. different

3.A. crowded       B. small        C. dirty          D. busy

4.A. protecting      B. saving       C. polluting    D. fighting

5.A. breathe        B. survive        C. drink          D. move

6.A. wonders       B. realizes     C. considers     D. discovers

7.A. poles         B. boats       C. methods        D. ideas

8.A. mountains      B. the sea       C. trees      D. forests

9.A. continue         B. stop       C. keep        D. go on

10.A. grow          B. plant          C. save         D. cut down

11.A. Thus         B. However        C. But           D. Therefore

12.A. still         B. even          C. also         D. certainly

13.A. too many       B. a few        C. some      D. few

14.A. production   B. pollution    C. population     D. pronunciation

15.A. work       B. deal         C. solve         D. serve

16.A. fruit        B. meat         C. fish         D. grain

17.A. feeds        B. increases        C. supplies         D. helps

18.A. use           B. stay         C. keep          D. last

19.A. control        B. born        C. plan        D. reward

20.A. nature        B. sea        C. planet         D. forest

In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be____36____ .

Today things are___37_____, the world has become too___38____ . We are using up our natural resources too quickly, and at the same time we are___39____ our environment with dangerous chemicals. If we continue to do this, human life on the earth ___40____survive.

Everyone___41_____ today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing__42_____ , more and more fish are caught. We know that if too many trees are cut down, ___43____will disappear and nothing will grow on the land. Yet, we ___44_____to use bigger and more powerful machines to __45____more and more trees.

We realize that if rivers are polluted with waste products from factories, we will die.___46_____, in most countries wastes are ___47______put into rivers or into the sea, and there are _48_____laws to stop this.

We know, too, that if the___49____ of the world continues to rise at the present rate, in a few years, there will not be enough___50_____. What can we do to solve these problems ?

It we eat more vegetables and less___51____, there will be more food available for everyone. Land that is used to grow crops __52_____five times more people than land where animals are kept.

Our natural resources will _53_____longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth__54_______ .

Finally, if we educate people to think about the problems, we shall have a better and clearer ___55____in the future.

1.                A．beautiful        B．unlimited （无限的） C．rare  D．valuable

2.                A．common        B．the same        C．changeable    D．different

3.                A．crowded        B．small           C．dirty D．busy

4.                A．protecting      B．saving          C．polluting  D．fighting

5.                A．may not        B．will not         C．shall not  D．could not

6.                A．wonders        B．realizes         C．consider  D．discovers

7.                A．poles          B．boats           C．methods  D．ideas

8.A mountains     B. the sea       C. trees              D. forests

9.                A．continue        B．have           C．ought    D．will go on

10.               A．grow          B．plant           C．save  D．cut down

11.               A．Thus           B．However       C．Generally speaking   D．Therefore

12.               A．still            B．even           C．also  D．certainly

13.               A．too many       B．a few          C．some D．few

14.               A．production      B．pollution        C．population D．revolution

15.               A．houses         B．vegetables      C．food  D．lives

16.               A．fruit           B．meat           C．fish   D．grain

17.               A．feeds          B．increases       C．supplies   D．helps

18.               A．use            B．stay           C．keep D．last

19.               A．control         B．born           C．plan  D．reward

20.               A．nature         B．sea            C．planet D．forest

In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be   1  .

Today things are   2  . The world has become too   3  . We are using up our natural resources too quickly, and at the same time we are   4  our environment with dangerous chemicals. If we   5  to do this, human life on the earth will not survive.

Everyone   6  today that if too many fish are taken from the sea, there will soon be none left. Yes, with modern fishing   7  , more and more fish are caught. We know that if too many trees are cut down,  8  will disappear and nothing will grow on the land. Yet we  9  to use bigger and more powerful machines to   10  more and more trees.

We realize that if rivers are polluted with waste products from factories, we will die.  11  , in most countries waste products are   12  put into rivers or into the sea, and there are   13  laws to stop this.

We know, too, that if the   14  of the world continues to rise at the present rate, in a few years, there will not be enough   15  . What can we do to solve these problems?

If we eat more vegetables and less   16  , there will be more food available for everyone. Land that is used to grow crops   17  five times more people than land where animals are kept.

Our natural resources will   18  longer if we learn to recycle them.

The world population will not rise so quickly if people use modern methods of birth   19  .

Finally, if we educate people to think about the problems, we shall have a better and cleaner   20  in the future.

1．A．beautiful                B．unlimited             C．rare                    D．valuable

2．A．common               B．the same              C．changeable          D．different

3．A．crowded               B．small                   C．dirty                   D．busy

4．A．protecting             B．saving                 C．polluting              D．fighting

5．A．try                        B．continue              C．decide                 D．have

6．A．wonders               B．realizes                C．considers            D．discovers

7．A．poles                    B．boats                   C．methods              D．ideas

8．A．mountains             B．the sea                C．trees                   D．forests

9．A．continue                B．have                    C．ought                  D． stop

10．A．grow                  B．plant                   C．save                    D．cut down

11．A．Thus                   B．However             C．Generally speaking   D．Therefore

12．A．still                     B．even                    C．also                    D．certainly

14．A．production           B．pollution              C．population           D．revolution

15．A．houses                B．vegetables            C．food                   D．lives

16．A．fruit                    B．meat                   C．fish                     D．grain

17．A．feeds                  B．increases             C．supplies               D．helps

18．A．use                     B．stay                    C．keep                   D．last

19．A．control                B．born                    C．plan                    D．reward

20．A．nature             B．sea             C．planet             D．forest

完形填空

　　In the past,man did not have to think about the protection of his environment. There were few people on the earth,and natural resources,seemed to be __1__.

　　Today things are __2__,the world has become too __1__ We are using up our natural resources too quickly and at the same time we are __4__ our environment with dangerous chemicals. If we continue to do this,human life on the earth __5__ survive.

　　Everyone __6__ today that if too many fishes are taken from the sea,there will soon be none left. Yet,with modern fishing __7__,more and more fishes are caught. We know that if too many trees are cut down,__8__ will disappear and nothing will grow on the land．Yet,we __9__ to use bigger and more powerful machines to __10__ more and more trees. 

    We realize that if rivers are polluted with waste products from factories,fish will die. __11__,in most countries wastes are __12__ put into rivers or into the sea,and there are __13__ laws to stop this. We know,too,that if the __14__ of the world continues to rise at the present rate in a few years there will not be enough __15__ What can we do to solve these problems?

　　If we eat more vegetables and less __16__,there will be more food available for everyone Land that is used to grow crops __17__ five times more people than land where animals are kept.

　　Our natural resources will __18__ longer if we learn to recycle them.

　　The world population will not rise so quickly if people use modern methods of birth __19__. Finally,if we educate people to think about the problems,we shall have a better and cleaner __20__ in the future.

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　　In the past,man did not have to think about the protection of his environment. There were few people on the earth,and natural resources,seemed to be __1__.

　　Today things are __2__,the world has become too __1__ We are using up our natural resources too quickly and at the same time we are __4__ our environment with dangerous chemicals. If we continue to do this,human life on the earth __5__ survive.

　　Everyone __6__ today that if too many fishes are taken from the sea,there will soon be none left. Yet,with modern fishing __7__,more and more fishes are caught. We know that if too many trees are cut down,__8__ will disappear and nothing will grow on the land．Yet,we __9__ to use bigger and more powerful machines to __10__ more and more trees. 

    We realize that if rivers are polluted with waste products from factories,fish will die. __11__,in most countries wastes are __12__ put into rivers or into the sea,and there are __13__ laws to stop this. We know,too,that if the __14__ of the world continues to rise at the present rate in a few years there will not be enough __15__ What can we do to solve these problems?

　　If we eat more vegetables and less __16__,there will be more food available for everyone Land that is used to grow crops __17__ five times more people than land where animals are kept.

　　Our natural resources will __18__ longer if we learn to recycle them.

　　The world population will not rise so quickly if people use modern methods of birth __19__. Finally,if we educate people to think about the problems,we shall have a better and cleaner __20__ in the future.

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