D Once there lived an old man．He liked gold better than anything else in the world．He often said.“If I have enough gold.I will be the happiest man in the world． One day when he was traveling in th 题目和参考答案——青夏教育精英家教网—

题目内容

Once there lived an old man．He liked gold better than anything else in the world．He often said，“If I have enough gold，I will be the happiest man in the world．”

One day when he was traveling in the desert(沙漠)，the old man lost his way．He was very hungry and thirsty，but there were only rocks and sand around him．Just then，he found a bag lying on the sand．He hoped he would find water and food in it．He took up the bag and opened it．He saw that the bag was full of gold．He was so sad that he threw away the bag and began crying．

Now the old man knew that there was something better than gold in the world．

53．The old man liked best before he traveled in the desert．

A．food B．bags C．books D．gold

54．When he lost his way，he wanted to get ．

A．some food and water B．some rocks and sand

C．bags full of gold D．a map

55．What did he do with the bag? ．

A．He didn't take it up B．He brought it home

C．He threw it away D．He cried

56．The old man didn't become the happiest man when he got the bag of gold because ．

A．the bag was too small B．the gold wasn't his

C．he was very cold D．he had nothing to eat．

57．In the end，the old man knew that gold was in the world．

A．the best thing B．not the best thing

C．the best important D．better than anything

53---57 D A C D B

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Even facts “forgotten” by people during a busy day may be retrieved if this is followed by a good night’s sleep.

Researchers from the University of Chicago asked volunteers to remember simple words．Many found their memories letting them down towards the end of the day, but the following morning, those who had slept well could recall much more.

Researchers, writing in the journal Nature, said the brain could “rescue” lost memories during the night.

When the brain is first asked to remember something that memory is laid down in an “unstable” state, meaning that it is possible that it could be lost．At some point, the brain consolidates those it deems important into a “stable”, more permanent state．However, the Chicago researchers suggested that it was possible for a “stable” memory to be made “unstable” again．This would mean that memories could be modified then filed away again in the face of new experiences.

The 12 volunteers tested in the experiment were played words created through a speech synthesizer which were purposely difficult to understand．Initially, the written version of the word from the audio version only．Tests revealed that the ability to recall the right word tended to tail off as the day ended.

However, when the volunteers were retested after a good night’s sleep, they were able to recall some words that they had “ forgotten” the previous evening.

Dr Daniel, one of the study authors, said: “Sleep consolidates memories, protecting them against subsequent interference or decay．Sleep also appears to “recover” or restore memories.” He said: “If performance is reduced by decay, sleep might actively recover what has been lost.”

Dr Karim Nader, from the Department of Psychology in McGill University in Montreal, said: “Memory research is undergoing a transformation---no longer is memory thought to be a hard-writing of the brain, instead it seems to be a process of storage and restorage.”

Sleep helps some memories “mature” and also prunes out unimportant memories.

What does the first paragraph implies?

A．A busy day makes people forget things easily.

B．People need a good night’s sleep after a busy day.

C．A good night’s sleep helps memories.

D．A good night’s sleep helps people forget a busy day.

The words the 12 volunteers played in the experiment were not ____

A．created through a speech synthesizer

B．hard to understand

C．available at the beginning

D．designed to test people’s ability of understanding

According to the passage, memory_____

A．is a hard-writing of the brain

B．is not a process of storage

C．is not a process of restorage

D．will be mature with the help of sleep

Which of the following is NOT true?

A．When people first remember something, the memory is in an “unstable state”.

B．The brain will change those important unstable memories into stable.

C．Once the memory become stable, it will never become unstable again.

D．Sleep can protect memories from being harmed.

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【小题3】The sellers will provide the service of wrapping except _____．

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The beginning of our sleep-deficit（lack）crises can be traced back to the invention of the light bulb a century ago．From diary entries and our personal accounts from the 18th and 19th centuries, sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night．“The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark．” By the 1950s and 1960s, the sleep schedule had been reduced dramatically, to between 7.5 and 8 hours, and most people had to wake to an alarm clock．“People cheat in their sleep, and they don’t even realize they’re doing it,” says Dr．David．“They think they’re okay because they can get by on 6.5 hours, when they really need 7.5, 8 or even more to feel ideally energetic. ”
Perhaps the most merciless robber of sleep, researches say, is the complexity of the day．Whenever pressures from work, family, friends and community increase, many people consider sleep the least expensive item on their programs．“In our society, you’re considered dynamic if you say you need only 5．5 hours’ sleep．If you’ve got to get 8．5 hours, people think you lack drive and ambition．”
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【小题1】What is the main topic of the passage?

A．The history of people’s sleeping patterns．

B．The epidemic of sleepiness in the modern times．

C．Research on the causes and consequences of sleep-deficit．

D．The minimum of our sleeping hours．

【小题2】Which of the following is Dr．David’s opinion?

A．People’s metal power suffers if they are lacking in sleep．

B．Some people can remain energetic with only 6．5 hours’ sleep a night．

C．If they get 8．5 hours’ sleep, people will be full of drive and ambition．

D．People who think they are sleeping enough are better off than those who don't．

【小题3】People in the 18th and 19th centuries slept about 9．5 hours a night because _______．

A．they had no electricity

B．they knew what was best for their health