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You cannot see any object unless light f...

You cannot see any object unless light from that object gets into your eyes. Some of the things you see give off light of their own. The sun, the stars, a lighted lamp are examples that can be ssen by their own light. Such things are luminous. Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. Then moon , for example , does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in your direction. So moonlight is only secondhand sunlight.

When you look at a book, it sends your eyes some of the light that falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.

Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if it took no time at all. Light reaches us form the moon , which is about 380,000 kilometers away, in only a little more than a second.

1.You can see the book because___________.

A.your eyes are close to it .

B.it reflects light

C.it has light of its own

D.your eyes can get to it

2.The word “ reflects”  means____________.

A.throws back

B.takes back

C.gives off

D.sends out

3.    ___________ have light of their won.

A.the sun and the moon

B.The stars and the earth

C.The sun and the stars

D.The moon and the earth

 

1.B 2.A 3.C 【解析】略
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I’ll never forget May 12, 2008, we were having classes at Beichuan Middle School , Sichuan Province, when a huge  36  hit the area.

At about 2:28 p.m, our  37  , Mr.Wang, was teaching us singing on the fourth floor on the teaching building.  38   we felt the building shaking violently. It was an earthquake! Our building starting to  39  . It was too late to rush out to the  40  . We were told to hide under the desks.  41  later, the whole building fell down. We were  42  in ruins. We couldn’t move at all. No one could really imagine at that split second, how much pain we had  43 or how desperate(绝望的) we felt as we waited to be  44 . I heard Mr. Wang calling our names again and again… .

Hours later, some people came to rescue and  45 of us were saved.

Later, I  46 this huge earthquake scaled 8.0 magnitude. It hit several provinces, including Sichuan, Gansu and Shanxi. So far it has  47 more than 80,000 and injured 360,000. My hometown ----Beichuan was  48  the worst-hit areas. Our school , which was  49  filled with vigor(活力) and laughter, was a dead valley.

Words after such a  50 could appear nothing but empty and pointless. So many people’s lives were taken away, so much  51  was done and the whole city was  52  . Beichuan has become a history.

Now , some of my classmates and I were  53  to study in a middle school in Jiangsu Province. I still  54  dreaming and still strive for a better future: to make our homes beautiful yet  55  .

May victims rest in peace. May survivors live to be stronger.

1.

A.rain

B.earthquake

C.snow

D.rock

 

2.

A.classmate

B.parent

C.friend

D.teacher

 

3.

A.Finally

B.Luckily

C.Suddenly

D.Actually

 

4.

A.fall

B.stand

C.run

D.walk

 

5.

A.home

B.desks

C.classroom

D.outdoors

 

6.

A.Minutes

B.Weeks

C.Hours

D.Days

 

7.

A.trapped

B.stayed

C.played

D.packed

 

8.

A.lived

B.escaped

C.enjoyed

D.suffered

 

9.

A.ignored

B.recovered

C.rescued

D.remembered

 

10.

A.all

B.some

C.none

D.each

 

11.

A.found out

B.added up

C.came up

D.set down

 

12.

A.devoted

B.helped

C.killed

D.concerned

 

13.

A.outside

B.without

C.far from

D.among

 

14.

A.now

B.once

C.then

D.never

 

15.

A.attitude

B.trouble

C.disaster

D.insurance

 

16.

A.lives

B.damage

C.highway

D.news

 

17.

A.in ruins

B.dug out

C.as usual

D.set up

 

18.

A.judged

B.persuaded

C.joined

D.organized

 

19.

A.care about

B.give in

C.keep on

D.go through

 

20.

A.peaceful

B.safe

C.grateful

D.active

 

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--- Are you pleased with what he has done?

--- Not in the least. It couldn’t be ___________.

A.so bad

B.much better

C.any worse

D.the best

 

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_____________, Mother will wait for him to have dinner together.

A.However late is Father

B.However Father is late

C.However is Father late

D.However late Father is

 

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 --- Would you like me to show you the way?

--- ____________.

A.That’s very kind of you

B.Yes, you could

C.Good idea !

D.With great pleasure.

 

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 Listen! His family must be quarrelling, ___________ ?

A.mustn’t it

B.isn’t it

C.aren’t they

D.needn’t they

 

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