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  For years scientists have been worried about the effects of air pollution on the earth's natural conditions.Some believe the air inside many houses may be more dangerous than the air outside.It may be one hundred times worse.

  Indoor air pollution can cause a person to feel tired, to suffer eye-pain, headache and other problems.Some pollutants(污染物)can cause breathing disorders, diseases of blood and even cancer.Most scientists agree that every modern house has some kind of indoor pollution.People began to notice the problem in the early 1970s.It is that when builders began making houses and offices they did not waste energy.To do this they built buildings that limited the flow of air between inside and outside.They also began using manmade building materials.These materials are now known to let out harmful gases.As the problem became more serious, scientists began searching for a way to deal with it.They discovered a natural pollution control system for buildinggreen plants.Scientists do not really know how plants control air pollution.They believe that a plant's leaves absorb or take in the pollutants.In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots.Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space.Studies of different plants show that each absorbs different chemicals.So the most effective way to clean the air is to use different kinds of plants.Having green plants inside your house can make it a prettier and healthier place.

(1)

Generally speaking, indoor air pollution may be more harmful than the air outside because ________.

[  ]

A.

the man-made building materials let out dangerous gases inside houses

B.

there may be more harmful gases outside houses

C.

the flow of air indoors is limited

D.

indoor air pollution can make a person seriously ill

(2)

The indoor air pollution is caused ________.

[  ]

A.

by the building method through which the builders want to save energy

B.

by the limit of the flow of air between inside and outside

C.

by the building things which are made of man made materials

D.

not only by the limit of air-flow but also by the man made materials

(3)

The most effective way to clean the air is to use different kinds of plants because ________.

[  ]

A.

they may let out more oxygen which people need

B.

they can absorb different kinds of the harmful indoor chemicals

C.

they can take in all kinds of indoor pollutants

D.

they can make your house prettier and more healthy

答案:1.A;2.D;3.B;
解析:

(1)

第二段中下面两句可以说明问题“To do this,they built buildings that limited the flow of air between inside and outside.”“These materials are now known to let out harmful gases.”)

(3)

本文最后两句即为答案。


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   Nancy Johnson was a good friend with all the boys and girls in her class. She had a nice face and __1__ eyes. She spoke __2__ than the other girls, but she __3__ basket-ball better than most of them. Nancy __4__ everything at school, and she never thought she was __5__ from the other pupils __6__ she was a Negro girl.

 Miss Dietrich, Nancy's __7__ teacher, taught her drawing. She taught Nancy __8__ take an idea and make a __9__ out of it. Your picture must be your idea, a part of __10__ , Miss Dietrich said. She __11__ Nancy that it is __12__ to draw a good picture. Your picture must not __13__ look nice, Miss Dietrich said. You must work at it __14__ the picture begins to live, until it is not __15__ any other picture in the world.

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(1)  A.    broad

  
  

Bbeautiful

  
  

Clikely

  
  

Dstraight

  
  

[  ]

  
  

(2)  A.    more

  
  

Bless

  
  

Clouder

  
  

Dslower

  
  

[  ]

  
  

(3)  A.    played the 

  
  

Bthrew

  
  

Cenjoyed

  
  

Dplayed

  
  

[  ]

  
  

(4)  A.    learned

  
  

Bsaid

  
  

Ctook    part in

  
  

Dattended

  
  

[  ]

  
  

(5)  A.    far

  
  

Bclever

  
  

Cwelcome

  
  

Ddifferent

  
  

[  ]

  
  

(6)  A.    thanks to

  
  

Bbut    for

  
  

Con    condition that

  
  

Dbecause

  
  

[  ]

  
  

(7)  A.    old

  
  

Bbest

  
  

Cmost    famous

  
  

Dfavourite

  
  

[  ]

  
  

(8)  A.    to

  
  

Bhow    to

  
  

Cwhere    to

  
  

Dhow

  
  

[  ]

  
  

(9)  A.    house

  
  

Blesson

  
  

Cpicture

  
  

Dstory

  
  

[  ]

  
  

(10) A.    the world

  
  

Bpicture

  
  

Cyou

  
  

Dyour    home

  
  

[  ]

  
  

(11) A.    explained

  
  

Basked

  
  

Cwarned

  
  

Dtaught

  
  

[  ]

  
  

(12) A.    wonderful

  
  

Bnecessary

  
  

Cdifficult

  
  

Deasy

  
  

[  ]

  
  

(13) A.    a little

  
  

Ba    bit

  
  

Conly

  
  

Dnecessarily

  
  

[  ]

  
  

(14) A.    on

  
  

Buntil

  
  

Cunless

  
  

Dif    only

  
  

[  ]

  
  

(15) A.    dawn

  
  

Bcopy

  
  

Clike

  
  

Dpaint

  
  

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(16) A.    believed

  
  

Bunderstood

  
  

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(17) A.    think of

  
  

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(18) A.    disclosed

  
  

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(19) A.    learning

  
  

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Bher    teacher

  
  

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D singing

  
  

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(24) A have

  
  

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C like

  
  

D require

  
  

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[  ]   

  

A.understands   

  

B.studies   

  

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D.calls   

  

2.   

  

  

  

  

  

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B.living   

  

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D.sleeping   

  

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[  ]   

  

A.table   

  

B.floor   

  

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[  ]   

  

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[  ]   

  

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B.broken   

  

C.down   

  

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[  ]   

  

A.information   

  

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2. A.selling                             B.sales

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5. A.at         &Unbsp;                       B.in

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6. A.on                                B.in

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“Do you think we’ll win? ”ten-year-old Tyrus Lucas asked his mother   1    he wrote his name on the entry(参赛作品) to Cartoon Network’s toy sweepstakes.

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14. A. showing                           B. moving

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16. A. troubling                           B. interrupting

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“Do you think we’ll win? ”ten-year-old Tyrus Lucas asked his mother   1    he wrote his name on the entry(参赛作品) to Cartoon Network’s toy sweepstakes.

“We can   2    , ”said his mother, a divorced mother who works as a teacher and struggled to   3     her kids, she didn’t have much money for   4    .

A week later the phone rang. “Your son won our drawing!” a woman    5    .

“Great, ”cried his mother, “Which   6   did he win? ”

“All of them. A thousand toys!”

The next Saturday when the doorbell of their home rang, Tyrus, not   7   the surprise, opened the door and his face    8   up. “Mom, ”he cried, “Cartoon Network is here!”

So were dozens of   9   kids who had run over to the cartoon-covered truck. They jumped   10   as hundreds of toys tumbled(摇晃) from the truck’s back doors.

Tyrus thought he could   11     his whole room with them. But as he looked at the children around him, he   12   . The others in their working-class neighborhood didn’t have

    13   either.

“Here, ”he said,    14    a doll to a little girl. Then he handed a boy another. “Take

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    17    , Mom? ” he asked. They   18   almost 100 toys to the elementary school where she works. “The first thing my son thought of was to   19    , ”his mother says, smiling, “I’m so   20     of him. ”

1. A. though                           B. as

C. as long as                            D. so that

2. A. guess                                B. ask

C. wait                             D. try

3. A. support                           B. promise

C. treat                           D. consider

4. A. drawings                           B. extras

C. food                           D. schooling

5. A. declared                           B. explained

C. spoke                                D. praised

6. A. prize                                B. pay

C. toy                                   D. wealth

7. A. seeing                           B. helping

C. knowing                           D. enjoying

8. A. lighted                           B. looked

C. turned                                D. set

9. A. attractive                           B. warm

C. helpful                                D. excited

10 . A. off                                B. out

C. down                                D. up and down

11. A. join                                B. fill

C. keep                           D. have

12. A. worried                           B. stopped

C. laughed                                D. examined

13. A. much                           B. great

C. little                             D. quantities

14. A. showing                           B. moving

C. handing                               D. driving

15. A. wherever                             B. however

C. whenever                           D. whatever

16. A. troubling                           B. interrupting

C. reminding                          D. thanking

17. A. schools                          B. friends

C. students                                D. children

18. A. contributed                        B. delivered

C. sold                             D. lent

19. A. take                               B. lend

C. give                             D. imagine

20. A. fond                           B. proud

C. sure                             D. kind

 

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