摘要: die out 灭绝 Unit 17

网址:http://m.1010jiajiao.com/timu3_id_3031745[举报]

阅读下面短文, 掌握其大意, 然后从1-25各题所给的四个选项中, 选出一个最佳答案。

(A)

      Millions of years ago, whales lived 1 and walked on 2 . Today whales 3 have small bones, 4 can only be seen on the inside of them. No one knows 5 whales left the land to live in the water. 6 , scientists can imagine when the whales changed their 7 conditions, their bodies underwent (经历) a change—showing a 8 fish-like appearance. This new 9 offered less resistance (抵抗) to the water. And the whales could 10 faster.

       Whales are not fish. 11 will die, just as a man will, if it stays under water too long. When a whale is under water it closes its 12 and holds its breath. The air in its lungs becomes very hot and its lungs are 13 water vapor. when a whale rises 14 and breathes, its hot breath produces a fountain (喷泉) of water that rises high in the air. A man produces 15 effect when he breathes warm air on a cold morning.   

                                                                                                                                                                                                                                                                             
1. A.in waterB.on land      C.in the sea     D.on the beach[    ]  
2. A.four legsB.two hands      C.stomach      D.their back[    ]  
3. A.evenB.still    C.never       D.also[    ]  
4. A.thatB.they    C.as         D.which[    ]  
5. A.howB.why C.whereD.when[    ]  
6. A.HoweverB.Besides C.AndD.And so[    ]  
7. A.healthyB.poor    C.badD.living[    ]  
8. A.moreB.much C.veryD.exact[    ]
9. A.kindB.sort C.typeD.form[    ]  
10. A.walkB.swim C.crawlD.run[    ]
11. A.WhalesB.A whale   C.The whaleD.One whale[    ]  
12. A.noseB.mouth C.eyes       D.hands[    ]  
13. A.full ofB.no C.filled       D.out of[    ]  
14. A.under the water  B.of the waterC.up the surfaceD.to the surface[    ]  
15. A.differentB.the same C.suchD.as[    ]  

(B)

    Men are the cleverest and most dangerous (危险的) animals on the earth. 16 come second. Men kill many beasts, they've even killed millions of men since very long ago, but rats kill 17 men. Rats carry many diseases (疾病) and these diseases have killed and are still killing thousands and thousands of men 18 in many countries. Rats are dangerous not in only one 19 . They not only carry diseases into men's homes, they also eat up men's food. They eat 33 million tons of 20 every year. Men starve because rats eat their food. Rats are 21 , too. They have good leaders to tell them the food is 22 when men put poison (毒药) in it. There are a lot of rats in our cities and 23 today. We can go to the moon, but we can not kill all these horrible animals. Is it 24 this dangerous enemy is too clever and 25 too fast, or we are not clever enough and not clean enough?

                                                                                                                                                                                   
16. A. Women     B. Rats    C. Foxes     D. Monkeys[    ]  
17. A. more     B. several    C. none     D. fewer[    ]  
18. A. yesterday   B. everyday    C. tomorrow   D. today[    ]  
19. A. way     B. day    C. time     D. moment[    ]  
20. A. vegetables  B. leaves    C. grass     D. grain[    ]  
21. A. brave     B. clever    C. dirty     D. careful[    ]  
22. A. helpful   B. fearless    C.terrible   D. dangerous[    ]  
23. A. valleys   B. streets    C. villages   D. forests[    ]  
24. A. whether   B. because    C. wherever   D. while[    ]  
25. A. travels   B. walks    C. runs     D. grows[    ]
查看习题详情和答案>>

阅读理解

  Fear and its companion pain are two of the most useful things that men and animals possess, if they are properly used.If fire did not hurt when it burnt, children would play with it until their hands were burnt away.Similarly, if pain existed but fear didn't, a child would burn himself or herself again and again, because fear would not warn himself or herself to keep away from the fire-that had burnt himself or herself before.A really fearless soldier-and some do exist is not a good soldier because he is soon killed; and a dead soldier is of no use to his army.Fear and pain are therefore two guards without which men and animals might soon die out.

  In our first sentence we suggested that fear should be properly used.If, for example, you never go out of your house because of the danger of being knocked down and killed in the street by a car, you are letting fear rule you too much.Even in your house you are not absolutely safe:an aero plane may crash on your house, or ants may eat away some of the beams in your roof so that the latter falls on you, or you may get cancer!

  The important thing is not to let fear rule you, but instead to use fear as your servant and guide.Fear will warn you of dangers; then you have to decide what action to take.

  In many cases, you can take quick and successful action to avoid the danger.For example, you see a car coming straight towards you.Fear warns you, you jump out of the way, and all is well.

  In some cases, however, you decide that there is nothing that you can do to avoid the danger.For example, you can't prevent an aero plane crashing onto your house.In this case, fear has given you its warning; you have examined it and decided on your course of action, so fear of this particular danger is no longer of any use to you, and you have to try to overcome it.

(1)

Children would play with fire until their hands were burnt away if ________.

[  ]

A.

they were given no warning beforehand

B.

they had never burnt themselves

C.

they had no sense of pain

D.

they were fearful of the fire

(2)

A really fearless soldier ________.

[  ]

A.

is of great use to the army

B.

is not a real soldier

C.

is nothing but a dead soldier

D.

easily gets killed in a battle

(3)

People sometimes succeed in timely avoiding the danger because ________.

[  ]

A.

they have gained experience

B.

they jump out of the way in time

C.

they are calm in the face of danger

D.

they are warned of the danger by fear and take quick action

(4)

What's the writer's suggestion when the danger can't be avoided?

[  ]

A.

You have to try to overcome it.

B.

Fear can really help you to run away.

C.

Fear always helps you stay safe.

D.

Fear is of great use to you.

查看习题详情和答案>>

阅读下面短文,掌握其大意,然后从各题所给的四个选项(A、B、C和D)中,选出最佳选项。

  In the twentieth century numerous new nations have been formed.Though their people often enjoy full political liberty,there exist at the same time a great many strange   1  .Native populations may be free to vote and to elect   2   they please to govern them,  3   popular prejudices(偏见),unusual and harmful customs take a long time to   4  .However,  5   people are better educated,they need not suffer in silence,  6   they are able to express their views.With the spread of civilization,  7   living conditions,the cheapness of radio sets,books and newspapers,most people are fairly   8   informed.  9   many unpleasant customs disappear rapidly.

    10   was a good example of this recently in a newly formed republic when a girl of fourteen refused to marry a sixty-year-old man who had“bought”her   11   $ 40.Her father had agreed   12   the marriage when the girl was only four years old and had“sold”her to the man who already had   13   six wives.Just before the marriage ceremony,the girl ran away and wrote to the president of the republic.In her letter she pointed out that although her country was   14  ,its people were still not truly free.Some human beings were like cattle.She asked the president if he felt that this was right.This letter caused the president a great deal of   15   and he immediately changed the cruel law   16   permitted women to be bought and sold.

  The girl won a considerable victory but she still had a big problem.She had to find $ 40 to repay the man who   17   have become her husband.There seemed to be   18   raising so much money.Fortunately,  19  ,the girl's story was broadcast on a radio program in Europe and nearly $ 20000   20   from listeners.The buyer got his money back and the girl was free to marry anyone she chose.She had won true freedom for herself and for others like her.

(1)

[  ]

A.

activities

B.

practices

C.

things

D.

people

(2)

[  ]

A.

whom

B.

what

C.

one

D.

that

(3)

[  ]

A.

and

B.

moreover

C.

but

D.

in addition

(4)

[  ]

A.

drop out

B.

wear out

C.

run out

D.

die out

(5)

[  ]

A.

if

B.

now that

C.

given

D.

though

(6)

[  ]

A.

for

B.

but

C.

as a result

D.

thus

(7)

[  ]

A.

asked

B.

increased

C.

improved

D.

progressed

(8)

[  ]

A.

quite

B.

good

C.

high

D.

well

(9)

[  ]

A.

In a way

B.

In this way

C.

In the way

D.

In all ways

(10)

[  ]

A.

It

B.

This

C.

That

D.

There

(11)

[  ]

A.

for

B.

with

C.

at

D.

about

(12)

[  ]

A.

with

B.

on

C.

to

D.

at

(13)

[  ]

A.

at most

B.

at least

C.

at length

D.

at best

(14)

[  ]

A.

independent

B.

dependent

C.

steady

D.

peaceful

(15)

[  ]

A.

attraction

B.

notice

C.

consideration

D.

concern

(16)

[  ]

A.

in which

B.

with which

C.

which

D.

to which

(17)

[  ]

A.

might

B.

must

C.

should

D.

would

(18)

[  ]

A.

by way of

B.

no way of

C.

in no way of

D.

by the way of

(19)

[  ]

A.

however

B.

accordingly

C.

moreover

D.

therefore

(20)

[  ]

A.

flowed in

B.

fell in

查看习题详情和答案>>

阅读下列短文,从所给的四个选项中,选出最佳答案

 You have learned that we can't live without air. We need air in order to live. Do you know that fires too need air in order to burn? If there is no air, you would not be able to make a fire. The more air there is, the longer something will burn.

 Let's make an experiment to show this. Take three candles of the same size and two jars, one bigger than the other. Stand the three candles separately and light them. Allow the first one to burn in the open, cover the second one with the smaller jar and the last one with the large jar. Which candle flame(火焰) dies out first? Which candle continues to burn? What will happen to them after some time?

(1) According to the passage, all of us know that ______. 

[  ]

Athe less wind there is, the less flame a candle has

Bthe more wind there is, the less flame a candle has

Cair is necessary for our lives

Dwe live in order to take in air

(2) The experiment will show ______. 

[  ]

Awe cannot live without air

Bwe can make a fire unless there is much air

Cthe candle in the biggest jar will burn the longest

Dthe less air there is, the shorter time a candle will burn

(3) When you light the three candles and cover two of them, you will see the candle in the smaller jar _____. 

[  ]

Awill die out soon   Bgoes on burning for long

Cdoesn't die out    Dcontinutes to burn

(4) What will the flames of the three candles look like shortly after the experiment begins? Choose one picture which tells the correct experiment. 

[  ]

(5) If you observe the experiment for some time, you will finally find that ______.

[  ]

Aonly the second candle flame dies out

Bno candles stop burning

Conly the first candle flame doesn't die out

Dthe flames of the three candles continue to be seen

查看习题详情和答案>>

  Fear and its companion pain are two of the most useful things that men and animals possess, if they are properly used.If fire did not hurt when it burnt, children would play with it until their hands were burnt away.Similarly, if pain existed but fear didn’t, a child would burn himself or herself again and again, because fear would not warn himself or herself to keep away from the fire-that had burnt himself or herself before.A really fearless soldier-and some do exist is not a good soldier because he is soon killed; and a dead soldier is of no use to his army.Fear and pain are therefore two guards without which men and animals might soon die out.

  In our first sentence we suggested that fear should be properly used.If, for example, you never go out of your house because of the danger of being knocked down and killed in the street by a car, you are letting fear rule you too much.Even in your house you are not absolutely safe:an aero plane may crash on your house, or ants may eat away some of the beams in your roof so that the latter falls on you, or you may get cancer!

  The important thing is not to let fear rule you, but instead to use fear as your servant and guide.Fear will warn you of dangers; then you have to decide what action to take.

  In many cases, you can take quick and successful action to avoid the danger.For example, you see a car coming straight towards you.Fear warns you, you jump out of the way, and all is well.

  In some cases, however, you decide that there is nothing that you can do to avoid the danger.For example, you can’t prevent an aero plane crashing onto your house.In this case, fear has given you its warning; you have examined it and decided on your course of action, so fear of this particular danger is no longer of any use to you, and you have to try to overcome it.

(1)

Children would play with fire until their hands were burnt away if ________.

[  ]

A.

they were given no warning beforehand

B.

they had never burnt themselves

C.

they had no sense of pain

D.

they were fearful of the fire

(2)

A really fearless soldier ________.

[  ]

A.

is of great use to the army

B.

is not a real soldier

C.

is nothing but a dead soldier

D.

easily gets killed in a battle

(3)

Fear should be used properly because ________.

[  ]

A.

an aero plane may crash onto your house

B.

you may get cancer

C.

fear can only be used as a servant and guide

D.

people are now letting fear rule them too much

(4)

People sometimes succeed in timely avoiding the danger because ________.

[  ]

A.

they have gained experience

B.

they jump out of the way in time

C.

they are calm in the face of danger

D.

they are warned of the danger by fear and take quick action

(5)

What's the writer's suggestion when the danger can't be avoided?

[  ]

A.

You have to try to overcome it.

B.

Fear can really help you to run away.

C.

Fear always helps you stay safe.

D.

Fear is of great use to you.

查看习题详情和答案>>

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网