摘要:72.So many helped the local people in the earthquake. 72.

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  From the coldest arctic ice to the hottest deserts you will find mammals living and thriving(兴旺).There seems to be no climate that they can't adapt to, however changeable it may be.Why can mammals adapt to so many different habitats? There is a good reason for this-mammals have the ability to keep their body at a constant temperature whatever the weather.They are “warm-blooded”.

  Mammals achieve this by chemically “burning” their food as fuel inside their bodies.This is kept under tight control by a region of the brain that acts like a thermostat(恒温器), and this makes sure that the mammal's body temperature stays about the same.

  A constant body temperature is a great advantage for mammals because all the chemical processes that go on inside a living body are likely to happen more slowly at low temperatures and faster at higher temperatures.Mammals can regulate their temperature at the best condition for all these processes, allowing them to be active at very cold or very hot periods and to keep up tiring activity for a long time.Animals such as lizards(蜥蜴)rely on moving in and out of the warm sunlight to regulate their body temperature.They slow down when they can't warm up and may die if they can't get away from heat.They also tend to overheat quickly when they are active as their muscles produce warmth.

  Using food energy to keep body temperature constant is expensive, and since mammals need to be efficient at keeping the warmth they create inside themselves, they often have fur and a cover of fat under their skin to prevent heat from escaping.To help lose heat when they are too hot, they have sweat glands(汗腺)that take the heat away from the skin through evaporating(蒸发)water.This means, though, that they need to drink more than other animals.

(1)

Mammals can adapt to so many habitats because ________

[  ]

A.

the climate is unchangeable

B.

they can regulate their body temperature

C.

they are “warm-blooded”

D.

their muscles produce warmth

(2)

When mammals keep their body at a constant temperature, ________

[  ]

A.

the chemical processes happen more slowly in their bodies

B.

the chemical processes happen faster in their bodies

C.

they will use less fuel inside their bodies

D.

they can live an active life

(3)

We can infer from the last paragraph that mammals ________

[  ]

A.

need to drink more than other animals

B.

have different ways of keeping their body temperature

C.

often have fur and fat to prevent heat from escaping

D.

have sweat glands that take the heat away from the skin

(4)

The writer answers the question raised in the first paragraph with ________

[  ]

A.

stories and explanation

B.

examples and conclusion

C.

evidence and argument

D.

explanation and comparison

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  My first performance in front of an audience was coming up soon.

  I tried as hard as I could to remain 36  , but I had an empty feeling in my stomach. I stared down at my sweat-covered, 37  hands.

  I looked up again at the audience, realizing that these were  38 people. They were not just my mum and dad, who  39 say, "Good job!" even if I messed up the entire piece.

  What if I had the wrong music? What if I played the wrong notes?

  As it  40 , I was never able to answer these questions because the spotlight was  41 for me. I grasped my hands tightly together, drying off the sweat.

  Slowly I walked to the mulberry piano in the 42 of the room. It contained 88 demanding keys, which were waiting impatiently to be played.I swallowed the golfball-sized lump(隆起的) in my throat and sat down. 43 , I opened the music. Next, I rested my still shaking hands on the ivory keys.

  As my fingers played across the keys, I was becoming more  44 of my preparation for this moment. But the memory of my year of training came flooding back. I knew that I had practiced this piece  45 that I could play it backwards if  46 .

  Although at one point I accidentally played two keys  47  the intended one, I continued to move my fingers automatically. My eyes burned holes into the page in front of me.

  There was no  48  that I was going to lose my concentration. To keep this promise to myself, I leaned  49 and focused carefully on the music.  50 1 came to the end of the page, a warning  51 inside my head: DON' T MAKE A MISTAKE WHEN YOU TURN THE PAGE!

  Needless to say, I 52  myself with all my heart and mind. And, proud of my "page- turning" feat (技艺), I finished the 53  of the piece without making a single mistake.

After the final note died away, a celebration went into action 54  my head. I had finished. I had mastered the  55 .

36.  A.unknown      B.still        C.calm             D.quiet

37.  A.shaking      B.moving     C.waving          D.wandering

38.  A.true         B.real      C.young           D.old

39.  A.will          B.can      C.could            D.would

40.  A.turned out     B.turned up    C.turned back        D.turned down

41.  A.looking      B.searching    C.expecting         D.waiting

42.  A.corner      B.cross       C.center           D.passage

43.  A.Slowly      B.Happily     C.Quickly           D.Suddenly

44.  A.sure          B.unsure      C.certain           D.confident

45.  A.so much time   B.so hardly    C.such a lot of time    D.so many times

46.  A.requested     B.told      C.demanded        D.ordered

47.  A.in spite of      B.instead of    C.in the way of       D.in the shape of

48.  A.way          B.need       C.use              D.sense

49.  A.backward      B.forward     C.upward           D.downward

50.  A.Then         B.Next      C.When           D.While

51.  A.appeared      B.had       C.raised         D.went

52.  A.told         B.asked     C.obeyed           D.refused

53.  A.other        B.part      C.left              D.rest

54.  A.inside         B.outside      C.out of            D.on

55.  A.musical        B.piece       C.impossible         D.possible

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完形填空

 It 1    be that when the world was young, no one  2   . People had to speak. Just  3    babies do. When one knew how to talk,  4    did anyone learn? That is a  5    that  6    even today.

 What would it be  7    if people were still  8    ? People might live together  9    protection, but there would be  10    cities, and no one would travel,  11    no one could tell them  12    . So many things would be  13    , that this world  14    like the world we know  15    .

 In a world  16    no one could talk, how would we be able to  17    our feelings or tell someone  18    about something that  19    us? There would be many things that you wouldn't know  20    there would be no one to explain them to you. You could learn things only  21    looking and remembering.

 It wouldn't be  22    to live in a world  23    no one could talk. There would still be love and friendship, but there would also be the  24    that stems from the  25   .

                                                                                                                                                                                                                                                                                                                                                                                               

(1) Amay

  

Bcan

  

Cshould

  

Dought    to

  

[  ]

  

(2) Aknew    what to do

  
Bknew    how to talk

[  ]

  

   Cknows    where to love

  
Dknows    when to start

(3) Aas

  

Bseemed

  

Clike

  

Dlooked

  

[  ]

  

(4) Awhat

  

Bfrom    who

  

Chow

  

Dwhere

  

[  ]

  

(5) Apleasure

  

Bsorrow

  

Cstory

  

Dmystery

  

[  ]

  

(6) Aremains unsolved

  

Bisn't a problem

  

Cis told

  

Dmakes you happy

  

[  ]

  

(7) Aseem

  

Blike

  

Cas

  

Deven

  

[  ]

  

(8) Aillnessless

  

Bhappinessless

  

Cspeechless

  

Dhelpless

  

[  ]

  

(9) Afrom

  

Bagainst

  

Cfor

  

Das

  

[  ]

  

(10)Ano

  

Ba    few

  

Cmany

  

Dsome

  

[  ]

  

(11)Abecause

  

Bfor   

  

Cexcept

  

Dsince

  

[  ]

  

(12)Awhich way run

  

Bhow to do

  

Cwhich way to go

  

Dwhen to travel

  

[  ]

  

(13)Adifficult

  

Bdifferent

  

Cthe    same

  

Deasier

  

[  ]

  

(14)Awouldn't be seen

  

Bmust the equal

  

[  ]

  
  Ccan    be the sameDmay    be different

(15)Ain all

  

 Bat all

  

Cabove all

  

Dall the same

  

[  ]

  

(16)Athat

  

Bwhich

  

Cwhere

  

Dwhen

  

[  ]

  

(17)Ashare

  

Bspend

  

Ccost

  

Dtake

  

[  ]

  

(18)Aanother

  

Bothers

  

Cother

  

Delse

  

[  ]

  

(19)Ahas taken place around

  

Bhappened to

  

[  ]

  
  Cwas    broken out forDexists    about

(20)Awhether

  

Bwhich

  

Cbecause

  

Dwhere

  

[  ]

  

(21)Aby

  

Bfrom

  

Con

  

Dbeyond

  

[  ]

  

(22)Afun

  

Bvalue

  

Cuse

  

Dgood

  

[  ]

  

(23)Athere

  

Bwhich

  

Cthat

  

Dwhere

  

[  ]

  

(24)Ahappiness

  

Bfear

  

Chardship

  

Dmystery

  

[  ]

  

(25)Aunknown

  

Buncertain

  

Cundecided

  

Ddiscovered

  

[  ]

  
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