B
　　Fever has usually been regarded as a threat to health.However,no one has actually proved that fever is dangerous.This fact attracted the attention of Matthew J.Kluger.Imagining that fever might not be as harmful as it had been supposed,Kluger set up a series of experiments with lizards(蜥蜴).
　　What Kluger and his team did his team did in their first experiment was simple.They put some lizards in a sand-box,one end of which was heated to 44℃,while the other was at a room temperature.It was found that the lizards moved form one part of the box to the other in order to keep a constant temperature of about 38℃.Having shown that normal lizards regulate(调节) their own temperature,Kuger,in a second experiment,then set out to show that lizards,like most other animals,develop fever when infected.This was done by making lizards infected with bacteria (细菌) that were known to cause disease.As the team expected,the infected lizards remained longer in the heated part of the box,until they had raised their body temperatures to two or three degrees above normal.In other words,the sick lizards gave themselves fever.
　　In a third experiment,the team observed the effect of temperature on the survival of the lizards.One group of infected lizards was given a fever - suppressing(退烧) drug.The other group was given no drug and ran a fever,that is to say,they kept a highter temperature for four or five days before seeking a cooler environment.The results were impressive.Of those which raised their body temperature,all but one remained alive.Of those given the fever - suppressing drug,more than half died.Similar results have since been produced in other animals.For example,infeced fish swim to warmer water,and will die if not allowed to do so.
　　An important conclusion can be drawn from these experiments.As Kluger points out,lizards have been on earth for hundreds of millions of years.It is reasonable to suppose that a response that is so old has been kept by nature for some purpose.It would appear, therefore, that fever does not make disease worse.Rather it its part of the mechanism(机能) by which infection is controlled.
　　60.In his experiments,Kluger was hoping to prove that fever ________.
　　　A.is not harmful to lizards
　　　B.is not necessarily bad
　　　C.is necessary for both humans and animals
　　　D.has the same effect on humans and animals
　　61.The lizards put in the sand - box in the first experiment _____.
　　　A.had a fever B.were not sick C.recovered from disease D.died of heat
　　62.In the third experiment,the lizards given a fever - suppressing drug died because _____.
　　　A.they had no more fever that they needed
　　　B.they were normal ones and had no fever
　　　C.the drug had no iffect on sick lizards
　　　D.the drug made their body temperature too low
　　63.How would you understand the underlined words"a response" in the last paragraph?
　　　A.Gause of disease. B.Recovery from disease.
　　　C.Relationship between living D.Natural defense in the body against disease.

    But, curiously, one of the rarest coins in the world is not made of gold, but of the relatively cheaper silver. In 1840, the United States mint struck 19, 570 silver dollars. That is what its records show. Today only six of this original number remain and these are unlikely ever to the auction market. So what happened to some 19, 564 large silver coins, not the easiest sort of things to lose? One of the more romantic theories is that they were part of the payment to Napoleon for the American territory then known as Louisiana. But they never reached France. Somewhere in the Gulf of Mexico, the ship transporting them was sunk, either by a storm or by pirates. The probable answer to the mystery is that they were melted down—since the silver value was greater than the actual value of the coin. What really happened to the rest will probably always remain a mystery. What .is known is that whoever can come up with one will find himself instantly rich.

　　 1. It can be inferred from the passage that——.

　　　　  A. money buys as much as it did before

　　    B. money does not buy as much as it did before

　　　　  C. paper money buys more than metal money

　　　　  D. metal money buys more than paper money

　　 2. Which of the following is true of a coin?

　　　　  A. The longer it is held, the less valuable it becomes.

　　　　  B. The more it wears out, the more valuable it becomes.

　　　　  C. The less it gets scratched, the less it values.

　　　　  D. The longer it lasts, the more it values.

　　 3. Coins becomes more valuable because

  　　　　A. they make purses and pockets untidy

　　　　  B. the price of metal goes up

　　　　  C. they fall more readily into a category for collections due to their duration

　　　　  D. both B and C

　　 4. What really happened to some 19, 564 large silver coins?

　　　　  A. They were melted down.　　　　 B. They were sunk in the Gulf of Mexico.

　　　　  C. It is still mystery.　　 　　    　　  D. They were stolen by pirates.

In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. equal. Some of them decided to "drop out" of American society and form their own societies. They formed utopian communities, which they called “communes”, where they could follow their philosophy of “do your own thing”. A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller, they built dome-shaped houses from pieces of old cars. Other groups, such as author Ken Kesey’s Merry Pranksters, the followers of San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school houses and traveled around the United States. The Hog Farm became famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin’s followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the group were arrested for growing marijuana.

　　Not all communes believed in the philosophy of “do your own thing”. However, Twin Oaks, a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner’s “conditioning” techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an “archeology”. Soleri believes that people must live closely together so that they will all become one.

Why did some young Americans decide to “drop out” of society during the 1960s?

　　A. They were not satisfied with American society.

　　B. They wanted to grow marijuana.

　　C. They wanted to go to the Vietnam War.

　　D. They did not want all people to be equal.

Where did the members of the Hog Farm commune live?

　　A. In dome-shaped house.         B. In old school houses.

　　C. On a farm in Tennessee.        D. In an archeology in Arizona.

Who gave the people of Drop City the idea to build dome-shaped house?

　　A. Paolo Soleri.  　             B. B.G.Skinner.

　　C. Steve Gaskin.                D. Buckminster Fuller.

What was the Twin Oaks commune based on?

　　A. The philosophy of “do your own thing”.

　　B. Virginia in the late 1960s.

　　C. The ideas of psychologist.

　　D. The belief that people must live closely together.

What is an “archeology”?

　　A. A person who studies archaeology.

　　B. A large building where people live closely together.

　　C. A city in Arizona.

　　D. A technique to control people.