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One day when Isaac Newton was reading a book under an apple tree on the farm, an apple fell down and hit him on the head. For most people that would be the end of the story, but not for Newton. Why did the apple fall out of the tree? Does everything fall? What makes things fall? Can anything stop things from falling? Are the sun, moon, and stars falling? Why don’t they ever hit the ground?

So many questions. Newton spent many years answering these questions by thinking and doing experiments. He made up the law of gravity. According to this law everything pulls everything else to itself by a force called gravity. How strong that force is depends on how heavy the things are and how close together.

Newton’s law of gravity not only explained how things fall on earth, but now planets move around the sun and how moons move around planets. A friend of his, Edmund Halley, decided to try Newton’s theory on comets. People had been studying comets for hundreds of years without figuring them out, so he decided to study their reports and compare them to Newton’s theory.

Up till then people had thought that comets just came and went, and that nobody could know when or why. But Newton’s law of gravity gave rules that Halley could use to study the records of comets. He found some reports of a big bright comet that he was sure was the same one, coming back every 75 years. He predicted when it would come back next.

If anybody still didn’t believe Newton, then the appearance of Halley’s Comet just when Halley had predicted it using Newton’s ideas was enough to convince them. Halley’s Comet has come a few times since then, always right on schedule. You’ll be able to see it on its next trip near the sun and earth when you’re old enough to be a grandparent.

71.The passage starts with a story _____________.

A.because it was such a funny one

B.because Newton liked to eat apples

C.to show how much Newton liked reading

D/to show what started Newton’s discovering gravity

72.According to the author, Newton was especially different from others in that ____________.

A.he liked reading under apple trees

B.he liked to find out how things worked

C.he was very quiet and patient

D.he was so much interested in science

73.Newton’s law of gravity can tell us that _____________.

A.gravity has no relationship with the weight of things.\

B.how things fall on earth

C.it is not of help to the study of comets

D.it can explain everything in the world

74.The underlined word “ convince” in the last paragraph probably means “______________”

A. make… believe                B. make… doubt

C. make… understand             D. make… interested

75. Which of the following is TRUE about Edmund Halley?

A. He discovered a big bright comet.

B. He helped Newton to create his theory.

C. He predicted when the same comet would come back.

D. He studied the same comet for 75 years.

 

【答案】

71---75   DBBAC  

【解析】略

 

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39.A.beating                    B. blinding                C. burning                D. touching

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41.A.looked up                B. woke up               C. lay down              D. sat down

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45.A.around                    B. beside                  C. through                D. above

46.A.yet                          B. for                       C. so                       D. or

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【小题1】
A.droppedB.fellC.rolledD.covered
【小题2】
A.SuddenlyB.StronglyC.QuicklyD.Hardly
【小题3】
A.beatingB.blindingC.burningD.touching
【小题4】
A.looked upB.woke upC.lay downD.sat down
【小题5】
A.lazilyB.angrilyC.freelyD.slowly
【小题6】
A.naturalB.commonC.strangeD.sad
【小题7】
A.aroundB.besideC.throughD.above
【小题8】
A.yetB.forC.soD.or
【小题9】
A.reachingB.leadingC.headingD.returning
【小题10】
A.themB.themselves C.himD.himself
【小题11】
A.goneB.leftC.followedD.lost
【小题12】
A.seeB.meetC.beatD.ask
【小题13】
A.waitedB.thoughtC.worriedD.excited
【小题14】
A.yardB.windC.grassD.rain
【小题15】
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One day, Raul was miles away from the small ranch (牧场)house in a large valley. Everything seemed to be all right, yet he felt strange and somewhat uneasy. The wind had picked up, and angry, dark clouds  31  across the sky. He could smell the rain coming. And it did.  32 , the lightning flashed through the clouds, nearly  33  Raul. The thunder (雷声) was so loud that he buried his head in his hands and rubbed his eyes. Then he heard it — hoof beats (蹄声). He  34 . There before him stood a tall, white horse. An old man stared down at him from its back.

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Raul followed on with his horse. A  36  feeling came over him. All  37  them the rain was pouring down,  38  not a drop fell on them. They seemed to be  39  back toward Raul’s home. Raul lost track of time. Then all at once, he found  40  at the ranch gate. The old man turned his horse, waved his hand, and smiled. Lightning flashed again. The old man and his horse were  41 .

Raul’s father ran out across the yard to  42  him. “We have been  43  about you. Are you okay? Hurry. Let’s get in out of the  44 .”

“Wait,” said Raul. “Have you ever heard of an old man called Gray Cloud?”

“Can’t say I … wait. I believe my great-grandfather used to tell stories about a man called Gray Cloud. He died a long time ago. They all say he was  45  by lightning during a terrible thunderstorm. Why do you ask?” At this, Raul was really more shocked than puzzled.

1.                A.dropped        B.fell            C.rolled    D.covered

 

2.                A.Suddenly       B.Strongly        C.Quickly   D.Hardly

 

3.                A.beating         B.blinding         C.burning   D.touching

 

4.                A.looked up       B.woke up        C.lay down  D.sat down

 

5.                A.lazily           B.angrily          C.freely    D.slowly

 

6.                A.natural         B.common        C.strange   D.sad

 

7.                A.around         B.beside          C.through  D.above

 

8.                A.yet            B.for            C.so   D.or

 

9.                A.reaching        B.leading         C.heading  D.returning

 

10.               A.them          B.themselves      C.him  D.himself

 

11.               A.gone          B.left            C.followed   D.lost

 

12.               A.see            B.meet          C.beat  D.ask

 

13.               A.waited         B.thought        C.worried   D.excited

 

14.               A.yard           B.wind           C.grass D.rain

 

15.               A.defeated       B.caught         C.damaged  D.struck

 

 

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