Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour’s flight one of the scientists wrote in his book, ’Look here for probable metal’ Scientists in another airplane, flying over a mountain region,sent a message to other scientists on the ground,’Gold possible.’ Walking across hilly ground, four scientists reported,’This ground should be searched for metals.’ From an airplane over a hilly wasteland a scientist sent back by radio one word,’Uranium’.

None of the scientists had X-ray eyes: they had no magic powers for looking down below the earth’s surface. They were merely putting to use one of the newest methods of location minerals in the ground---using trees and plants as signs that certain minerals may lie beneath the ground on which the trees and plants are growing.

This newest method of searching for minerals is based on the fact that minerals deep in the earth may affect the kind of bushes and trees that grow on the surface.

At Watson Bar Creek, a brook six thousand feet high in the mountains of British Columbia, Canada,a mineral search group gathered bags of tree seeds. Boxed were filled with small banches from te trees. Roots were dug and put into boxes. Each bag and box was carefully marked. In a scientific laboratory the parts of the forest trees were burned to ashes and tested .Each small part was examined to learn whether there were minerals in it.

Study of the roots , branches,and seeds showed no silver. But there were small amounts of gold in the roots and a little less gold in the branches and seeds. The seeds growing nearest to the tree trunk had more gold than those growing on the ends of the branches.

If the trees had not indicated that there was gold in the ground, the scientists would not have spent money to pay for digging into the deeper. They did dig and found more fold below. They dug deeper. They found large quantities of gold.

1.Scientists were flying over a desert or hilly wasteland or a mountain region in order to search for _____ in the ground.

a.gold

b.silver

c.metals

d.minerals

2.The study of trees,branches and roots indicates that_______.

a.there were larger amounts of gold in the branches than in the seeds.

b.there were small amounts of gold in the roots than in the branches

c.there were larger amounts of gold in the seeds growing nearest to the tree trunk than seeds growing on the ends of branches.

d.there were more gold in the branches than in the roots

3.Which is the best title ?

a.Scientists searching for metals with sepcial power

b.New methods of searching for minerals

c.Gold could be found by trees and plants

d.A new method of searching for minerals---using trees and plants

4.Which of the following is not mentioned as part of a tree that can help find minerals?

a.leaves

b.roots

c.branches

d.seeds

5.The scientists were searching for minerals by using ______.

a.X-ray

b.magic power

c.a special instrument

d.trained eyes

答案：dcdad

In the United States, it is not customary to telephone somenone very early in the morning. If you telephone him early in the day, while he is shaving or having breakfast, the time of the call shows that the matter is very important and requires immediate attention.The same meaning is attached to telephone calls made after 11:00 p.m..If someone receives a call during sleeping hours , he assumes it’s a matter of life or death. The time chosen for the call communicates its importance.

In social life, time plays a very important part. In the U.S.A. guests tend to feel they are not highly regarded if the invitation to a dinner party is extended only three or four days before the party date. But it is not true in all countries. In other areas of the world , it may be considered foolish to make an appointment too far in advance because plans which are made for a date more than a week away tend to be forgotten. The meaning of thime differs in different parts of the world. Thus, misunderstandings arise between peopel from cultures that treat time differently. Promptness is valued highly in American life, for edample. If people are not prompt, they may be regarded as impolite or not fully responsible. In the U.S. no noe would think of keeping a business associate waiting for an hour , it would be too impolite . A person who is 5 minutes late, he will say a few words of explanation, though perhaps he will not complete the sentence.

1."The same meaning is attached to telephone calls made after 11:00 p.m.." Here " attached" means______

a.taken

b.drawn

c.given

d.shown

2.Supposing one wants to make a telephone call at dawn, this would mean________.

a.the matter is important

b.the matter is somewhat important

c.the matter requires immediate attention

d.it is a matter of life and death

3.According to this passage , time plays an important role in _________.

a.everyday life

b.shool life

c.communications

d.private life

4. The best title for this passage is_________.

a. the voices of time

b.the importance of time

c.the importance of an ammouncement

d.time and tide wait for no man

5.According to the passage, the author of the article may agree to which of the following statements?

a.It is appropriate to send your invitation cards three or four days before a dinner party date in U.S.A.

b.It may be appropriate to send your invitation to your guests three or four days before a dinner party date in some cultures.

c.It is best for one to make telephone calls at night because it costs much less.

d.If one is less than 5 minutes late, he has to make a short apology.

答案：cdcab

Liberia, the oldest independent Negro state in West A frica, has been struggling for survial ever since its foundation in 1822.Progress has been hampered by constant hostility between the American Negroes whose families returned there in the early 19th century, and the West Africans whose ancestors never left the continent. Though the two groups are of the same race, they are divided by language and outlook and regard each other with deep suspicion creating a conflict which was not foreseen by Liberia’s founders.

In addition, neighboring states, native tribel,disease, and poverty have made life dangerous and difficult. The government has tried desperately, through loans and a trickle of trade, to make ends meet.Anxiety about financial matters lessened somewhat when,in 1910, the United States accepted responsibility for Liberia’s sruvival. However, not until Harvey Firestone, the American rubber king,decided that the United States must produce itsown rubber----with Liberia as the site of the rubber plantations----did liberia have much hope of paying its debts and balancing its budget.

The rubber industry,founded in the 1920’s ,and the activity that followed it brought both progerss and profit to Liberia. Before that time Liberia had no roads, no mechanical transport and no good port; its people had little education and few tools. Liberians feel that the country is being ruled by rubber. For this reason, the recent discovery of iron ore is important. Liberian leaders are trying to moderate the power of the ruvver industry and to estaglish the country’s political and economic independence.

1.Liberia has been in idffculty since its independence mainly because______.

a.the american negroes do not want to help the country.

b.there have been constant hostillity and suspicion between different tribes in the country.

c.there haven been constant hostility and suspicion between two groups of the same tride.

d.the goverment has adoped a wrong policy

2."The government has tried desperately, through loans and a trickle of trade, to make ends meet." to make ends meet" means_______.

a.the goverment has to borrow money from others

b. the goverment has to lend money to others

c.the goverment doesn’t have to borrow or lend money

d.the goverment has either to borrow or to lend money

3.The country’s finance began to improve a bit in________.

a.1822

b.1910

c.1920

d.1920’s

4.The Liberians’s attitude on to improve a bit in_______.

a.a total agreement

b.a total disagreement

c.a hostility

d.not a total agreement

5.The best title for this passage is_______.

a. American Negroes in West Africa

b.liberia----- a poor country

c.liberia and its development

d.liberia ----a country with rich rubber and iron

答案：ccbdc

The accuracy of cientific observations and calculations is always at the mercy of the scientist’s timekeeping methods. For this reason,scientists are interested in devices that give promise of more precise timekeeping.

In their search for precision, scientists have turned to atomic clocks that depend on various vibrating atoms or molecules to supply their "ticking" .This is possible because each kind of atom or molecule has its own characteristic rate of vibration. The nitrogen atom in ammonia , for example, vibrates or "ticks" 24 billion times a second.

One such atomic clock is so accurate that it will probaly lose no more than a second in 3000 years. It will be of great improtance in fields such as astronomical is a sesium atom that vibrates 9.2 billion times a second when heated to the temperature of boiling water.

An atomic clock that operates with an ammonia molecue may be used to check the accuracy of predictions based on Einstein’s relativity theories, according to which a clock in motion and a clock at rest should keep time differently. Placed in an orbiting satellite moving at a speed of 18000 miles an hour, the clock could broadcast its time readings to a ground station, where they would be compared with the readings on a similar model. Whatever differences develop would be checked against the differences predicted.

1.Scientists expect that the atomic clocks will be ______.

a.more precise

b.absolutely accurate

c.more durable

d.indestructible

2.The heart of the atomichron is _______.

a.acesium atom

b.an ammonia molecule

c.a nitrogen atom

d.a hydrogen

3.From theselection,we may assume that temperature changes_______.

a.affect only ammonia molecules

b.may affect the vibration rate of atoms

c.affect the speed at which atoms travel

d.do not affect atoms in any way

4.Identical atomic clocks may be used to check______.

a.the effect of outer space on an atomic clock

b.the actual speed of an orbiting satelite

c.the accuacy of predictions based on theories of relativity

d.all of Einstein’s theories

5.Implied but not stated:_______.

a.Precise timekeeping is essential in science

b.Scientists expect to disprove Einstein’s relativity theories

c.Atomic clocks will be important in space flight

d.The rate of vibration of an atom never varies

答案:aabcc

Kite flying is the sport of sending up into the air,by means of the wind , a light frame covered with paper,plastic or cloth. The frame can be one of many different shapes and is attached to a long string held in the hand or wound on a drum. Kites have a long history of practical application and many different types of kite have been debeloped to serve various purposes.

The ancient Chinese used bird-kites to carry ropes across rivers and valleys. The current folding kite which will dive excitingly is an improved type of such a kite. With its long flat body and single pair of bird-like wings,it looks just like a large bird in the air. The modern version is usually made of tissue-paper rather than the traditional silk.

Man-lifting kites were developed in ancient times, again by the Chinese, for getting information from walled cities and army camps. In fact , as recently as world 2 ,German U-boats flew kites from their towers to lift people into the air to watch the land. These kites ,which are no longer in existence,were made of light-weight cloth.They were much larger and stronger than the Chinese ones. Their design,however, was simply that of the cutter kite. Smaller in size,this type of kite is still very popular as a toy for children, being easy to make with a diamond-shaped frame,no wings and brown-paper covering.

Box-kites are another type of kite found in toy shops today. The first box-kite,named for its box-like body,was developed in the nineteenth century to test theories of flight and this type of cotton-covered kite greatly assisted the success of early aeroplane.These kites are the ancestors of a heavier version of the box-kite,which consists of two main sections,placed side by side. Developed for the peacetime purpose of fishing in strong sea wind,it is the only modern kite described which has practical value . A long-lasting plastic material has to be used for this kite,which carries fishing lines.

1.The ancient Chinese bird-kites were usually made of light frames covered with_____.

a.silk

b.paper

c.cloth

d.plastic

2.The kites used by German U-boats in would war 2 for the military purpose were made of _____.

a.brown paper

b.plastic material

c.light-weight cloth

d.traditional silk

3.The ancient Chinese man-lifting kites were used_____.

a.to carry ropes across rivers and valleys

b.for the military purpose

c.as toy for children

d.for fishing in strong sea wind

4.Which of the following statements is not ture?

a.The frame of a kite is attached to long string held in the hand or wound on drum.

b.The ancestor of the double box-kite.

c.The cutter kite has a diamond-shaped body but no wings.

d.The current folding kite is developed to test theories of flight.

5.The best title for this passage may be______.

a.The ancestors of modern kites

b.The history of the chinese kites

c.different types and uses of kites

d.the different between ancient and modern kites.

答案：acbdc

Accreditation is a system for setting national standards of quality in education. The United States is unique in the would because its accreditation system is not administered by the government , but rather by committees of educators and private agencies, like the Middle States Association of Colleges and Secondary Schools and the Society of Engineers.

Before registering to study in any educational institution in the U.S.,a student should make certain that the institution is accredited in order to assure that the school has a recoginized standard of organization,instruction,and financial support. Foreign students should be particularly careful to check an institution’s accreditation because other governments or future employers may not recognize a degree earned from a school that has not recevied accreditation.

If a college is accredited,catalogues and brochures will usually indicate the accreditation status. If you are not sure about a certain school,don’t hesitate to check its requtation with an education officer at the nearest U.S. embassy.

1.The word ’unique’ in line 2 most nearly means_______.

a.unusual

b.first

c.standard

d.large

2.What school students do in order to check the accreditation of a school that may interest them?

a.Write to the school

b.Write to the U.S.Ministry of Education

c.Register to study at the school

d.Consult a U.S. embassy offical

3.From this passage, it may be concluded that an unaccredited

school____.

a.does not coffer degree

b.may close because of financial disorganization

c.is administered by the government

d.is better than an accredited school

4.The title that best expresses the ideas in this passage is _____.

a.studying in the untied states

b.accreditation

c.how to find the best school

d.the middle states association of colleges and secondary schools

答案：adbb

Personality is , to large extent,inherent --A-type parents usually bring about A-type offspring.But the environment must also have a profound effect,since if competition is improtant to the parents, it is likely to become a major factor lives of their children.

One place where children soak up A characteristics is school,which is ,by its very nature,a highly competitive institution. Too many schools adopt the "win at all costs" moral standard and measure their success by sporting achievements. The current passion for making children compete against their classmates or against the clock produces a two-layer system,in which competitive A types seem in some way better than thier B-type fellows.Being too keen to win can have dangerous consequences:remember that Pheidippides ,the first marathon runner,dropped dead seconds after saying:"Rejoice,we conquer!".

By far the worst form of competition in school is the disproportionate emphasis on examinations . It is a rare school that allows pupils to concentrate on those things they do well.The merits of competition by examination are somewhat questionable,but competition in the certain knowledge of failure is positively harmful.

Obviously, it is neither practical nor desirable that all A youngsters change into ’B’s. The would needs types,and schools have an important duty to try to fit a child’s personality to his possible future employment. It is top management.

1.Acoording to the author,waht factors contribute to the building of personality?

a.inheritance

b.inheritance,competition and environment

c.competition

d.environment

2.Which of the following statements is not ture according to the author of the passage?

a.Schools usually adopt severe competitive policies.

b.Students are often divided by competition results.

c.School is place where children cultivate their characteristics.

d.The stronger desire for winning,the better.

3.The phrase "soak up" is closest in meaning to ____.

a.pull up

b.take up

c.take in

d.pull in

4.What attitude does the author hold toward examinations in schools?

a.positive

b.negative

c.doubtful

d.neutral

5.what suggestion does the author make concerning the management of schools?

a.All students be made into competitive A types.

b.A child’s personality be considered in regard to his possible future job.

c.All students be changed into B characteristics.

d.Schools abolish all forms of examinations.

答案：bdccb