American scientists have developed the first material that repairs itself. The material is a form of plastic that has been engineered to fill breaks in its surface.
Plastics are used today in everything from airplane wings to hundreds of object found in the home. Scientists wanted to find a way to make objects made of plastic last longer. The researchers hope their new discovery can be used to make objects that are difficult or impossible to replace.
The surface of plastic objects breaks over time. Very small breaks develop every time a plastic object is used. The researchers wanted to find out how to stop plastic from developing small breaks that weaken and destroy it. They found the answer in the chemical structure（构造）of plastic itself.
Plastic is made of monomers（单体）. These monomers link together to form polymers（聚合物）. Polymers give plastic its ability to be shaped and its strength. The research team found a way to make plastic that contains very small balloons filled with monomer liquid（液体）. When the new plastic cracks（裂开）, the monomer liquid is let out and flows into the crack. Thus the break is repaired. The repaired plastic has seventy – five percent of the strength of undamaged plastic.
The new self – repairing plastic is not yet ready for production. But it has several possible uses. One could be in space vehicles where parts cannot be repaired or replaced. Another possible use might be in bridges. And it could be used in people, to replace bone joints that have become broken or damaged.
72．Which of the following can be the best title for the article?
A．Ever-Lasting Material Invented.
B．The Chemical Structure of Plastic.
C．Plastic that Repairs Itself.
D．Small Balloons that Makes Plastic Stronger.
73．We know from the passage that the repair is done as .
A．the cracked plastic parts are changed
B．the plastic is made
C．the liquid is put into the plastic cracks
D．the plastic cracks
74．The scientist are planning to use the new material in space vehicles, bridges and people because .
A．the plastic parts in them are required to last longer
B．the plastic parts in them are easily broken or damaged
C．the new material cannot be used elsewhere
D．they want to experiment in these places first
75．What can we know about the new material mentioned in the passage?
A．It is a kind of liquid that is commonly used.
B．It is more difficult to make than common plastics.
C．Its surface does not crack so easily as other ones.
D．It makes it difficult or impossible to replace plastic objects.
PALO ALTO, California----"Switching off the television may help prevent children from getting fatter---- even if they do not change their diet or increase the amount they exercise," US researchers said last week.
A study of 192 third and fourth graders, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds(0.9kg) less over a one-year period than those who did not change their television diet.
"The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity," said Thomas Robinson, a pediatrician(儿科专家) at Stanford University.
"American children spend an average of more than four hours per day watching television and videos or playing video games, and rates of childhood being very fat have doubled over the past 20 years," Robinson said.
In the study, presented this week to the Pediatric Academic Societies‘ annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.
Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continued their normal television viewing, even though neither group ate a special diet or took part in any extra exercise.
"One explanation for the weight loss could be the children unstuck to the television may simply have been moving around more and burning off calories," Robinson said.
"Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more," Robinson said.The author tries to tell us in the first two paragraphs that ________.
| A．children will get fatter if they eat too much |
| B．children will get thinner if they eat less |
| C．children will get fatter if they spend less time watching TV |
| D．children will get fatter if they spend more time watching TV |
According to the passage, the time American children usually spend on watching TV_____.
| A．is more than four hours a day |
| B．is less than four hours a day |
| C．doubled in the last twenty years |
| D．is more than on any other activities |
The time children spend on TV viewing every day is suggested to be about
| A．six hours | B．eight hours | C．three hours | D．one hour |
Why can watching TV increase kids’ weight according to the passage?
A. They usually eat more while watching TV.
B. They burn off fewer calories.
C. They change their diet while watching TV.
D. Both A and B.
The way people hold to the belief that a fun-filled，pain-free life equals happiness actually reduces their chances of ever attaining real happiness．If fun and pleasure are equal to happiness then pain must be equal to unhappiness．But in fact，the opposite is true：more often than not things that lead to happiness involve some pain．
As a result，many people avoid the very attempts that are the source of true happiness．They fear the pain inevitably brought by such things as marriage， raising children， professional achievement，religious commitment，self improvement．
Ask a bachelor （单身汉）why he resists marriage even though he finds dating to be less and less satisfying．If he is honest he will tell you that he is afraid of making a commitment．For commitment is in fact quite painful．The single life is filled with fun，adventure，excitement．Marriage has such moments，but they are not its most distinguishing features．
Couples with infant children are lucky to get a whole night’s sleep or a three-day vacation．I don’t know any parent who would choose the word fun to describe raising children．But couples who decide not to have children never know the joys of watching a child grow up or of playing with a grandchild．
Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating realizations．It liberates time：now we can devote more hours to activities that can genuinely increase our happiness．It liberates money：buying that new car or those fancy clothes that will do nothing to increase our happiness now seems pointless．And it liberates us from envy：we now understand that all those who are always having so much fun actually may not be happy at all．According to the author，a bachelor resists marriage chiefly because ．
| A．he finds more fun in dating than in marriage |
| B．he believes that life will be more cheerful if he remains single |
| C．he is reluctant to take on family responsibilities |
| D．he fears it will put an end to all his fun adventure and excitement |
Raising children，in the author’s opinion，is ．
| A．a moral duty | B．a thankless job |
| C．a source of inevitable pain | D．a rewarding task |
From the last paragraph，we learn that envy sometimes stems from ．
| A．hatred | B．misunderstanding | C．prejudice | D．ignorance |
To understand what true happiness is one must ．
| A．be able to distinguish happiness from fun |
| B．make every effort to liberate oneself from pain |
| C．put up with pain under all circumstances |
| D．have as much run as possible during one’s lifetime |
What is the author trying to tell us?
| A．It is important to make commitments． |
| B．One must know how to attain happiness． |
| C．Happiness often goes hand in hand with pain |
| D．It is pain that leads to happiness． |
People
People is America’s No．1 magazine about fascinating people．It’s a guide to who and what’s hot in the arts，science，business，politics，television，movies，books，music and sports．It is published weekly．
Publisher：The Time Inc．Magazine Company
Cover Price：＄211．47
Our Price：＄117．00
Issues：53 issues／12 months
Lucky
Lucky is the shopping magazine with the best buys，and the fashion tips you’ll need before you hit the stores．What makes Lucky really special is that it gets you the information you need before anyone else has it．
Publisher：Conde Nast Publications Inc．
Cover Price：＄35．40
Our Price：＄15．00
Issues：12 issues／12 months
Parents
The most trusted magazine for parents who want to raise smart，loving and self-confident children．Each issue has age-specific child-development guidance，advice on your child’s health and safety，and the best ways to encourage your child’s learning．
Publisher：Meredith Corporation
Cover Price：＄42．00
Our Price：＄9．97
Issues：12 issues／12 months
Entertainment
This magazine covers movies，television，music，Broadway stage productions，books，and popular culture．Unlike celebrity-focused magazines like People，its main concentration is on entertainment media and reviews．It’s intended for a more general audience．
Publisher：The Time Inc．Magazine Company
Cover Price：＄199．50
Our Price：＄38．95
Issues：57 issues／12 months Which of the following targets common readers?
| A．Lucky． | B．Entertainment． | C．Parents． | D．People． |
According to the passage，what makes Lucky so special?
| A．Its exclusive information related to shopping． |
| B．Its pictures of fashion stores． |
| C．The access it provides to bargains． |
| D．Its competitive price． |
Celebrity-focused magazines are probably ones focusing on ．
| A．political events |
| B．festivals and celebrations |
| C．hot events and famous stars |
| D．television programs |
You’re most likely to find the above information ．
| A．in an educational magazine |
| B．on a magazine club website |
| C．in a guide to magazines |
| D．in a magazine sales report |
costs the subscriber least．
| A．Lucky | B．Parents | C．People | D．Entertainment |
Are you a compulsive spender，or do you hold on to your money as long as possible? Are you a bargain hunter? Would you rather use charge accounts than pay in cash? Your answers to these questions will reflect your personality．According to psychologists，our individual money habits not only show our beliefs and values，but can also stem from past problems．
Experts in psychology believe that for many people，money is an important symbol of strength and influence．Husbands who complain about their wives’ spending habits may be afraid that they are losing power in their marriage．Wives，on the other hand，may waste huge amounts of money because they are angry at their husbands．In addition，many people consider money a symbol of love．They spend it on their family and friends to express love，or they buy themselves expensive presents because they need love．
People can be addicted to different things —for example，alcohol，drugs，certain foods，or even television．They are compulsive in their addictions，i．e．they must satisfy these needs to feel comfortable．In the same way，according to psychologists，compulsive spenders must spend money．
For people who buy on credit，furthermore，charge accounts are even more exciting than money：in other words，they feel that with credit，they can do anything．Their pleasures in spending enormous amounts are actually greater than those they get from the things they buy．
There is even a special psychology of bargain hunting．To save money，of course，most people look for sales，low prices，and discounts．Compulsive bargain hunters，however，often buy things that they don’t need just because they are cheap．They want to believe that they are helping their budgets，but they are really playing an exciting game：when they can buy something for less than other people，they feel that they are winning．Most people，experts claim，have two reasons for their behavior：a good reason for the things that they do and the real reason．
It is not only scientists，of course，who understand the psychology of spending habits，but also business people．Stores，companies，and advertisers use psychology to increase business：they consider people’s needs for love，power，or influence，their basic values，their beliefs and opinions， etc．in their advertising and sales methods．
Psychologists often use a method called “behavior therapy（疗法）”to help individuals solve their personality problems．In the same way，they can help people who feel that they have problems with money：they give them “assignments” If a person buys something in every store that he enters， for instance，a therapist might teach him self discipline in this way：on the first day of his therapy， he must go into a store，stay five minutes，and then leave．On the second day，he should stay for ten minutes and try something on．On the third day，he stays for fifteen minutes，asks the salesclerk a question，but does not buy anything．Soon he will learn that nothing bad will happen to him if he doesn’t buy anything，and he can solve the problem of his compulsive buying．If you use charge accounts， ．
| A．you pay in cash |
| B．you pay less than you should |
| C．you pay with credit card |
| D．you pay more than you should |
Compulsive bargain hunters buy things for all the following reasons except that ．
| A．the things they buy are cheap |
| B．they believe they can balance their budgets |
| C．they get psychological satisfaction |
| D．they really need the things they buy |
Behavior therapy in this case aims at ．
| A．helping businessmen to increase their business |
| B．helping compulsive spenders to buy less |
| C．finding out how people will react if they are allowed to buy |
| D．finding out what people will do in front of a bargain |
The underlined word “those” in Paragraph 3 refers to ．
| A．different things |
| B．their addictions |
| C．their pleasures |
| D．charge accounts |
From the passage we can conclude that ．
| A．how you spend money reveals if you are psychologically healthy |
| B．money is a necessity and will bring you happiness if you have much |
| C．compulsive buying problems can be solved by taking some medicine |
| D．all businessmen understand well the psychology of customers |
Chinese media and Internet users on Monday condemned lack of morals in society after a toddler was struck twice –by two different vans-and left bleeding on the road as more than a dozen bystanders did nothing to help the seriously injured girl．
The incident， captured by a surveillance camera and broadcast by Southern Television Guangdong （TVS），showed the two-year-old girl was knocked down and run over by a white van on a narrow market street on the afternoon of Oct．13，in Foshan City of Guangdong Province．
The driver fled the scene of the accident，leaving the girl to bleed on the sidewalk．Over the next six minutes，more than a dozen people walked by the girl，yet not one individual did anything to help her．The girl was then hit a second time by another van before an elderly trash collector came to her aid and brought the attention of the girl’s mother，according to the video and eyewitnesses．
Doctors said that the girl，who was put on life support after being hospitalized，remains in a deep coma．The girl’s parents，who are migrants living in the city，are now with her．
Police said the drivers of both vehicles have been arrested．However，the apathy of the bystanders shown in the video has shocked the public，as Internet forums have seethed with anger， and people are questioning the morality of society．
High moral standards were once triumphed as national pride in China where individuals known for selflessly helping others were adored by the public．
But in recent years，the perception（观念）of a decline of morals has become a hot topic as profit and materialism are perceived to be affecting society’s values．
On Sept．2 an 88-year-old man in central China collapsed，his face striking the pavement．Yet，no one came to his aid，and he ended up choking to death on the blood from his nose．
Some have linked the absence of good Samaritans （模范人物）to a previous case in which a man trying to help an elderly woman who fell was accused of harming her．
A strong chorus of opinion on the Internet says laws should exempt（免除）Samaritans from liability（责任），yet laws themselves cannot solve society’s morality dilemma．
Cao Lin，a China Youth Daily commentator，said in a signed article published on Monday that the worry of liability should not be an excuse for not helping，and this case exposes the decline of humanity in Chinese society．According to the passage，what would happen if someone helped others selflessly in the past?
| A．He/ she would be condemned by the public． |
| B．He/ she would be awarded by the government． |
| C．He/ she would have to worry about liability． |
| D．The public would feel proud of him/ her and thus showed love and respect for him/ her |
Which of the following is TRUE about this passage?
| A．Nobody helped the girl who was struck twice by two different vans． |
| B．The toddler died immediately after she was hit a second time． |
| C．High moral standards were once regarded as national pride in China． |
| D．Journalists from TVS captured the incident by using a camera． |
In recent years，society’s values is believed to be affected by ．
| A．profit and materialism | B．people’s perceptions |
| C．the apathy of bystanders | D．the morals of society |
According to Cao Lin，what is the fundamental reason for not helping the girl?
| A．The worry of liability． |
| B．Lack of laws that exempt Samaritans from liability． |
| C．The decline of humanity in society． |
| D．The fear of being accused of harming her． |
Where is the article most probably taken from?
| A．A fashion magazine． | B．A news report． |
| C．A science fiction． | D．An education column． |
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