3、Now we know that all this is caused by the movement of the earth around the sun.As the earth journeys around the sun， it spins on its own axis.This can be illustrated (解释，说明)by a simple experiment.If you push a sharp stick(尖头棒)through a rubber ball and twirl(使旋转)it with two fingers， the ball spins around in much the same way the earth is spinning at this moment.The points where the stick comes through the ball correspond to(等同于)the North and South Poles.If you twirl this ball at night directly in front of a bright light， you will notice that half of the ball is lighted up while the other half is in the shade(阴暗处).That is just like our night and day.If you keep the stick strictly vertical(垂直的)to the light and twirl it at an even speed， any spot on the ball’s surface will be in the light and in the shade the same length of time.

32.She has three sons， all ()became doctors.

A. 　of which

B. 　which

C. 　of whom

D. 　who

2. Passage SixteenJustin was always prepared.His motto was “Never throw anything out， you never know when it might come in handy.” His bedroom was so full of flat bicycle tires， bent tennis rackets， deflated basketballs， and games with missing pieces that you could barely get in the door.His parents pleaded him to clean out his room.“What use is a fish tank with a hole in the bottom?” his father asked.But Justin simply smiled and repeated his motto， “Never throw anything out， you never know when it might come in handy.”When Justin was away from home， he always carried his blue backpack.He liked to think of it as a smaller version of his bedroom——a place to store the many objects that he collected.It was so worn and stretched that it hardly resembled a backpack anymore.It was full of the kind of things that seemed unimportant， but when used with a little imagination， might come in handy.Justin had earned a reputation for figuring things out and getting people out of otherwise hopeless situations.Many of his classmates and neighbors sought him out when they needed help with a problem.On the first day of school， his friend Kenny， came looking for Justin.“Do you think you have something in your bag that could help me remember my locker combination?” he asked.“I lost the paper it was written on.I have science class in two minutes and if I’m late on the first day it’ll make me look bad for the rest of the year.” Kenny looked genuinely worried.“Relax，” Justin said， taking his backpack off and opened it.“Remember how you borrowed my notebook in homeroom to write the code down? Well， I know how we can recover what you wrote.”He took the notebook and a soft lead pencil out of his bag.The page that Kenny had written on had left faint indentations (旧凹痕)on another page in the notebook.Justin held the pencil on its side and rubbed it lightly over the indentations.Slowly but surely the numbers of the locker combination appeared in white， set off by the gray pencil rubbings.“That’s amazing!” Kenny said.“I owe you one.” And he dashed off to open his locker.In what way is Justin’s backpack a smaller version of his bedroom?

37.She earns a good salary， so she ()be deep in debt.

A. 　can’t

B. 　must

C. 　needn’t

D. 　should

1. Passage Thirty-FourMuch unfriendly feeling towards computers has been based on the fear of widespread unemployment resulting from their introduction.Computers are often used as part of automated (自动化的)production systems requiring a least possible number of operators， causing the loss of many jobs.This has happened， for example， in many steelworks.On the other hand， computers do create jobs.They are more skilled and better paid， though fewer in number than those they replace.Many activities could not continue in their present form without computers， no matter how many people are employed.Examples are the check clearing (交换)system of major banks and the weather forecasting system.When a firm introduces computers， a few people are usually employed in key posts (such as jobs of operations managers)while other staff are re-trained as operators， programmers， and data preparation staff.After the new system has settled down， people in non-computer jobs are not always replaced when they leave， resulting in a decrease in the number of employees.This decrease is sometimes balanced by a substantial increase in the activity of the firm， resulting from the introduction of computers.The attitudes of workers towards computers vary.There is fear of widespread unemployment and of the takeover of many jobs by computer-trained workers， making promotion for older workers not skilled in computers more difficult.On the other hand， many workers regard the trend toward wider use of computers inevitable.They realize that computers bring about greater efficiency and productivity， which will improve the condition of the whole economy， and lead to the creation of more jobs.This view was supported by the former British Prime Minister， James Callaghan in 1954， when he made the point that new technologies hold the key to increased productivity， which will benefit the economy in the long run.The unfriendly feeling towards computers is developed from ().

17.The computer revolution may well change society as ()as did the Industrial Revolution.

A. 　certainly

B. 　insignificantly

C. 　fundamentally

D. 　comparatively

1.He came back late，()which time all the guests had already left.

A. 　after

B. 　by

C. 　at

D. 　during

3. Passage Twenty-FourSocial change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways.The simple reason for this is that there are more different ways of looking at things present in the first kind of society.There are more ideas， more disagreements in interest， and more groups and organizations with different beliefs.In addition， there is usually a greater worldly interest and greater tolerance in mixed societies.All these factors tend to promote social change by opening more areas of life to decision.In a society where people are quite similar in many ways， there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same.And although conditions may not be satisfactory， they are at least customary and undisputed.Within a society， social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material， for example， in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore， social change is easier if it is gradual.For example， it comes more readily in human relations on a continuous scale rather than one with sharp dichotomies (一分为二).This is one reason why change has not come more quickly to Black American as compared to other American minorities， because of the sharp difference in “appearance between them and their white counterparts”.According to the passage， which of the following is NOT true?

4. Passage FourteenFor a long time， people have disagreed about whether golf is a sport or a game.On one side of the argument， people say that golf meets the dictionary definition of a sport， because it is a physical， athletic activity.They add that golf is recognized as a sport by sporting goods companies， athletic groups， fans， and the media.Also， golf’s inclusion in the Olympics in 2016 is more proof that it is a sport.On the other side， people say that golf is a game， not a sport.They say golf is not a very physical activity and can be played well by people who are overweight or injured.Also， golf was only recently added to the Olympics.For more than 100 years it was not included in the Olympic Games.For many， the Olympic Games serve as a measurement for whether an activity should be called a sport.Golf was first included in the Olympics in 1900.However， it was removed shortly thereafter because of a lack of participation and conflict with other golf events.Through the years， there were several attempts to bring golf back to the Olympics.It wasn’t until the 2016 Summer Olympics in Rio de Janeiro， Brazil that golf returned.Some say the return of golf does not prove that it is a sport.Rather， it only proves that the Olympics wanted to benefit from the star power of famous golfers like Tiger Woods.The disagreement continues today.Those who think golf is a sport point to pro-golfers like Woods， who are strong and fit.Those who disagree point to golfers like John Daly.He is a successful pro-golfer who once had health problems.So is golf a sport? The answer depends on who you ask——and whether that person owns a set of golf clubs.According to Paragraph 5， the inclusion of golf in the Olympics ().

2. Passage FifteenBig data can be defined as information that is too big or complex to be contained or processed by any one machine or person.As a student at the University of Sussex， Julian Dailly had two majors——English and philosophy.When he completed his studies， Dailly wondered how he would ever earn a living in a world filled with machines and technology.Now， he is part of the big data industry that includes Google and Facebook.Dailly’s research company， Monar Consulting， started three years ago with five employees.The company’s earnings have increased by 25% each year.It now employs 90 people.“What we do here is we try to discover what’s meaningful for people and link that to their economic behavior，” Dailly said.He noted the importance of working with people with different skills.“We have people from traditional research backgrounds， in addition to some in social sciences， economics， people from tech backgrounds， and sales people，” Dailly said.Companies like Dailly’s employ recent college graduates.The industry profits from the ideas of these young men and women.New forms of data also make it possible for some observers to predict the future.They are more valuable to companies than the traditional forms of data recording or reporting.“We have access to the core information inside people’s heads，” Dailly said， “They tell you what people are going to do as opposed to what they’ve done.That helps people take proper action in advance.This makes it much more useful for strategy.”Julian Dailly dismisses concerns that computers have finally taken control of our daily lives.“Some may worry that humans will be allowed to be replaced by machines.I think it’s a fantasy.”Dailly’s company focuses on businesses in ().

9、Prices determine how resources are to be used.They are also the means by which products and services that are in limited supply are rationed(定量配给)among buyers.The price system of the United States is a complex network composed of the prices of all the products bought and sold in the economy as well as those of a variety of services， including labor， professional， transportation， and public services.The interrelationships(相互关系)of all these prices make up the “system” of prices.The price of any particular product or service is linked to a broad， complicated system of prices in which everything seems to depend more or less upon everything else.