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 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 earth．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 recyclethem．

　 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．unusual　　　 D．valuable

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

．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．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．go on

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

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

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

13．A．many 　　　　 B．none 　　　　 C．some 　　　　 D．few

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

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

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．pay

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（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

 

Directions：For each blank in the following passage there are four words or phrases marked A，B，C and D．Fill each blank with a word or phrase that best fits the context．

In the past, man didn’t 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  , and the world has become too  38  . We’re 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 will not survive.

Everyone 40   today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 41   , 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   42  to use bigger and more powerful machines to cut down more and more trees.

We know that if rivers are polluted with waste products from factories, we’ll die.  43  , in most countries wastes are still put into rivers or into the sea, and there are 44   laws to stop this.

We know, too, that if the 45   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 there will be more food available for every one. Land that is used to grow crops   46   five times more people than land where animals are kept. Our natural resources will last longer if we learn to recycle them.

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 47    in the future.

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

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

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

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

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

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

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

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

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

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

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

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

Directions：For each blank in the following passage there are four words or phrases marked A，B，C and D．Fill each blank with a word or phrase that best fits the context．

In the past, man didn’t 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  , and the world has become too  38  . We’re 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 will not survive.

Everyone 40   today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 41   , 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   42  to use bigger and more powerful machines to cut down more and more trees.

We know that if rivers are polluted with waste products from factories, we’ll die.  43  , in most countries wastes are still put into rivers or into the sea, and there are 44   laws to stop this.

We know, too, that if the 45   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 there will be more food available for every one. Land that is used to grow crops   46   five times more people than land where animals are kept. Our natural resources will last longer if we learn to recycle them.

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 47    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. wonders       B. realizes          C. considers          D. discovers

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

7.A. continue       B. have             C. ought                 D. go on

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

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

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

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

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