Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward signs of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pot dog or cat include loss of playfulness and energy, a decline in hearing and eyesight, or even a slight graying of the coat. Plants age too, but the signs are much harder to detect.
Most body parts grow bigger and stronger, and function more efficiently during childhood. They reach their peak at the time of maturity, or early adulthood. After that, they begin to decline. Bones, for example, gradually become lighter and more brittle. In the aged, the joints between the bones also become rigid and more inflexible. This can make moving very painful.
All the major organs of the body show signs of aging. The brain, for example, works less efficiently, and even gets smaller in size. Thinking processes of all sorts are slowed  down. Old people often have trouble in remembering recent events.
One of the most serious changes of old ago occurs in the arteries, the blood vessels that lead from the heart. They become thickened and constricted, allowing less blood to flow to  the rest of body. This condition accounts, directly or indirectly, for many of the diseases of the aged. It may, for example, result In heart attack.
Aging is not a uniform process. Different parts of the body wear out at different rates. There are great differences among people in their rate of aging. Even the cells of the body differ in the way they age. The majority of cells are capable of reproducing themselves many times during the course of a lifetime. Nerve cells and muscle fibers can never be replaced  once they wear out.
Gerontologists - scientists who study the process of aging - believe this wearing out of the body is controlled by a built-in biological time-clock. They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years.

All of the followings may be the outward signs of aging EXCEPT      ................

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

   Many flowering plants woo insect pollinators and gently direct them to their most fertile blossoms by changing the color of individual flowers from day to day. Through color cues, the plant signals to the insect that it would be better off visiting one flower on its bush than another. The particular hue tells the pollinator that the flower is full of far more pollen than are neighboring blooms. That nectar-rich flower also happens to be fertile and ready to disperse its pollen or to receive pollen the insect has picked up from another flower. Plants do not have to spend precious resources maintaining reservoirs of nectar in all their flowers. Thus, the color-coded communication system benefits both plants and insects.

   For example, on the lantana plant, a flower starts out on the first day as yellow, when it is rich with pollen and nectar. Influenced by an as-yet-unidentified environmental signal, the flower changes color by triggering the production of the pigment anthromyacin. It turns orange on the second day and red on the third. By the third day, it has no pollen to offer insects and is no longer fertile. On any given lantana bush, only 10 to 15 per cent of the blossoms are likely to be yellow and fertile. But in tests measuring the responsiveness of butterflies, it was discovered that the insects visited the yellow flowers at least 100 times more than would be expected from haphazard visitation. Experiments with paper flowers and painted flowers demonstrated that the butterflies were responding to color cues rather than, say, the scent of the nectar.

   In other types of plants, blossoms change from white to red, others from yellow to red, and so on. These color changes have been observed in some 74 families of plants.

The word “triggering” is closest in meaning to __________

Choose the best answer to complete the sentence.

Regional development activities have been carried out _______ ASEAN cooperation

During the seventeenth and eighteenth centuries, almost nothing was written about    the contributions of women during the colonial period and the early history of the newly formed United States. Lacking the right to vote and absent from the seats of power, women were not considered an important force in history. Anne Bradstreet wrote some significant poetry in the seventeenth century, Mercy Otis Warren produced the host contemporary    history of the American Revolution, and Abigail Adams penned Important letters showing    she exercised great political Influence over her husband, John, tiie second President of the United States. But little or no notice was taken of these contributions. During those centuries, women remained Invisible In history  books.
Throughout the nineteenth century, this lack of visibility  continued,  despite  the  efforts of female authors writing about women, These writers, like most of their male counterparts, were amateur historians. Their writings were celebratory in  nature,  and  they were uncritical in their selection and use of  sources.
During the nineteenth century, however, certain feminists showed a keen sense of history by keeping records of activities in which women were engaged. National, regional,    and local women's organizations compiled accounts of  their  doings.  Personal  correspondence, newspaper clippings, and souvenirs were saved and stored. These sources  from the core of the two greatest collections of women’s history In the United States one at   the Elizabeth and Arthur Schleslnger Library at Radcliffe College, and the other the Sophia Smith Collection at Smith College. Such sources have provided valuable materials for later Generations of historians.
Despite the gathering of more information about ordinary women during  the  nineteenth Century, most of the writing about women conformed to  the  "great  women"  theory of History, just as much of mainstream American  history  concentrated  on  "great  men," To demonstrate that women were making significant contributions to American life, female authors singled out women leaders and wrote biographies, or else important women produced their autobiographies. Most of these leaders were Involved in public life  as  reformers, activists working for women's right to vote, or authors,  and  were  not  representative at all of the great of ordinary woman. The lives of ordinary people continued, generally, to be untold in the American histories being   published.

In the 2nd paragraph, what weakness in nineteenth-century histories does the author point out?

New surveys suggest that the technological tools we use to make our lives easier are  killing our leisure time. We are working longer hours, taking fewer and shorter vacations (and when we do go away, we take our cell phones, PDAs, and laptops along). And, we are more stressed than ever as increased use of e-mail, voice mail, cell phones, and the Internet is destroying any idea of  privacy and leisure.
Since the Industrial Revolution, people have assumed that new labor-saving devices would free them from the burdens of the workplace and give them more time to grow intellectually, creatively, and socially -exploring the arts, keeping up with current events, spending more time with friends and family, and even just ''goofing off''.
But here we are at the start of the 21st century, enjoying one of the greatest technological boom times in human history, and nothing could be further from the truth. The very tools that were supposed to liberate us have bound us to our work and study in ways that were inconceivable just a few years ago. It would seem that technology almost never does what we expect.
In 'the old days', the lines between work and leisure time were markedly clearer. People  left their offices at a predictable time, were often completely disconnected from and out of touch with their jobs as they traveled to and from work, and were off-duty once they were home. That is no longer true. In today's highly competitive job market, employers demand increased productivity, expecting workers to put in longer hours and to keep in touch almost constantly via fax, cell phones, e-mail, or other communications devices. As a result, employees feel the need to check in on what is going on at the office, oven on days off. They feel pressured to work after hours just to catch up on everything they have to do. Workers work harder and longer, change their work tasks more frequently, and have more and more reasons to worry about job security.
Bosses, colleagues, family members, lovers, and friends expect instant responses to voice mail and e-mail messages. Even college students have become bound to their desks by an environment in which faculty, friends, and other members of the college community increasingly do their work online. Studies of time spent on instant messaging services would probably show staggering use.
This is not what technology was supposed to be doing for us. Now technologies, from genetic research to the Internet, offer all sorts of benefits and opportunities. But, when new tools make life more difficult and stressful rather than easier and more meaningful - and we are, as a society, barely conscious of it - then something has gone seriously awry, both with our expectations for technology and our understanding of how it should benefit us.

This passage has probably been taken from.................

The issue of equality for women in British society first attracted national attention in the early 20th century, when the suffragettes won for women the right to vote. In the 1960s feminism became the subject of intense debate when the women's liberation movement encouraged women to reject their traditional supporting role and to demand equal status and equal rights with men in areas such as employment and pay.
Since then, the gender gap between the sexes has been reduced. The Equal Pay Act of 1970, for instance, made it illegal for women to be paid less than men for doing the same work, and in 1975 the Sex Discrimination Act aimed to prevent either sex having an unfair advantage when applying for jobs. In the same year the Equal Opportunities Commission was set up to help people claim their rights to equal treatment and to publish research and statistics to show where improvements in opportunities for women need to be made. Women now have much better employment opportunities, though they still tend to get less well-paid jobs than men, and very few are appointed to top jobs in industry.
In the US the movement that is often called the "first wave of feminism' began in the mid 1800s. Susan B. Anthony worked for the right to vote, Margaret Sanger wanted to provide women with the means of contraception so that they could decide whether or not to have children, and Elizabeth Blackwell, who had to fight for the chance to become a doctor, wanted women to have greater opportunities to study. Many feminists were interested in other social issues.
The second wave of feminism began in the 1960s. Women like Betty Friedan and Gloria Steinem became associated with the fight to get equal rights and opportunities for women under the law. An important issue was the Equal Rights Amendment (ERA), which was intended to change the Constitution. Although the ERA was not passed, there was progress in other areas. It became illegal for employers, schools, clubs, etc. to discriminate against women. But women still find it hard to advance beyond a certain point in their careers, the so-called glass ceiling that prevents them from having high-level jobs. Many women also face the problem of the second shift, i.e. the household chores.
In the 1980s, feminism became less popular in the us and there was less interest in solving the remaining problems, such as the fact that most women still earn much less than men.
Although there is still discrimination, the principle that it should not exist is widely accepted.

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

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
Humans are bringing about another global-scale change in the atmosphere: the increase in what are called greenhouse gases. Like glass in a greenhouse, these gases admit the Sun's light but tend to reflect back downward the heat that is radiated from the ground below, trapping heat in the Earth's atmosphere. This process is known as the greenhouse effect. Carbon dioxide is the most significant of these gases – there is 25 percent more carbon dioxide in the atmosphere today than there was a century ago, the result of our burning coal and fuels derived from oil. Methane, nitrous oxide, and CFCs are greenhouse gases as well.
Scientists predict that increases in these gases in the atmosphere will make the Earth a warmer place. They expect a global rise in average temperature somewhere between 1.0 and 3.5 degrees Celsius in the next century. Average temperatures have in fact been rising and the years from 1987 to 1997 were the warmest years on record. Some scientists are reluctant to say that global warming has actually begun because climate naturally varies from year to year and decade to decade, and it takes many years of records to be sure of a fundamental change. There is little disagreement, though, that global warming is looming.
Global warming will have different effects in different regions. A warmed world is expected to have more extreme weather, with more rain during wet periods, longer droughts, and more powerful storms. Although the effects of future climate changes are unknown, some predict that exaggerated weather conditions may translate into better agricultural yields in areas such as the western United States, where temperature and rainfall are expected to increase, while dramatic decreases in rainfall may lead to severe droughts and plunging agricultural yields in parts of Africa, for example.
Warmer temperatures are expected to partially melt the polar ice caps, leading to a projected sea level rise of 50 centimeters by the year 2050. A sea level rise of this magnitude would flood coastal cities, force people to abandon low-lying islands, and completely inundate coastal wetlands. Diseases like malaria, which at present are primarily found in the tropics, may become more common in the regions of the globe between the tropics and the polar regions, called the temperate zones. For many of the world's plant species, and for animal species that are not easily able to shift their territories as their habitat grows warmer, climate change may bring extinction.

The word "looming" in paragraph 2 probably means .....................

Read the passage carefully and choose the correct answer

On 8 August 1967, five leaders - the Foreign Ministers of Indonesia, Malaysia, the Philippines, Singapore and Thailand- sat down together in the main hall of the Department of Foreign Affairs building in Bangkok, Thailand and signed a document. By virtue of that document, the Association of Southeast Asian Nations (ASEAN) was born. The five Foreign Ministers who signed it have been considered as the founders of probably the most successful intergovernmental organization in the developing world today. The document that they signed would be known as the ASEAN Declaration.

It is a short, simply-worded document containing just five articles. It declares the establishment of an Association for Regional Cooperation among the Countries of Southeast Asia to be known as the Association of Southeast Asian Nations (ASEAN) and spells out the aims and purposes of that Association. These aims and purposes are about the cooperation in economy, society, culture, techniques, education and other fields, and in the promotion of regional peace and stability through abiding respect for justice and the principles of the United Nations Charter. It stipulates that the Association will be open for participation by all States in the Southeast Asian region subscribing to its aims, principles and purposes. It proclaims ASEAN as representing the collective will of the nations of Southeast Asia to bind themselves together in friendship and cooperation and, through joint efforts and sacrifices, secure for their peoples and for posterity the blessings of peace, freedom and prosperity. The goal of ASEAN, then, is to create, not to destroy.

The original ASEAN logo presented five brown sheaves of rice stalks, one for each founding member. Beneath the sheaves is the legend "ASEAN" in blue. These are set on a field of yellow encircled by a blue border. Brown stands for strength and stability, yellow for prosperity and blue for the spirit of cordiality in which ASEAN affairs are conducted. When ASEAN celebrated its 30^th Anniversary in 1997, the sheaves on the logo had increased to ten -representing all ten countries of Southeast Asia and reflecting the colors of the flags of all of them. In a very real sense, ASEAN and Southeast Asia will be one and the same, just as the founders had envisioned.

Which does not belong to the purpose and aim of the Association of Southeast Asian Nations?

Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward signs of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pot dog or cat include loss of playfulness and energy, a decline in hearing and eyesight, or even a slight graying of the coat. Plants age too, but the signs are much harder to detect.
Most body parts grow bigger and stronger, and function more efficiently during childhood. They reach their peak at the time of maturity, or early adulthood. After that, they begin to decline. Bones, for example, gradually become lighter and more brittle. In the aged, the joints between the bones also become rigid and more inflexible. This can make moving very painful.
All the major organs of the body show signs of aging. The brain, for example, works less efficiently, and even gets smaller in size. Thinking processes of all sorts are slowed  down. Old people often have trouble in remembering recent events.
One of the most serious changes of old ago occurs in the arteries, the blood vessels that lead from the heart. They become thickened and constricted, allowing less blood to flow to  the rest of body. This condition accounts, directly or indirectly, for many of the diseases of the aged. It may, for example, result In heart attack.
Aging is not a uniform process. Different parts of the body wear out at different rates. There are great differences among people in their rate of aging. Even the cells of the body differ in the way they age. The majority of cells are capable of reproducing themselves many times during the course of a lifetime. Nerve cells and muscle fibers can never be replaced  once they wear out.
Gerontologists - scientists who study the process of aging - believe this wearing out of the body is controlled by a built-in biological time-clock. They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years.

What does "Aging is not a uniform process" mean?

 Choose the option A, B, C or D that best answers the question about the passage:

"The seven-nation Association of Southeast Asian Nations (ASEAN) met September 2, 1996, in Singapore, to discuss how to police the Internet. Although the group agreed on the need to control the explosion of information available on the Internet, it was unable to reach a common policy for regulating access to the global Computer network.
 At the end of the three-day meeting, ASEAN government officials and industry experts issued a statement emphasizing the need to block access to Web sites that run “counter to our cherished values, traditions and culture.” ASEAN comprises Brunei, Indonesia, Malaysia, the Philippines, Singapore, Thailand, and Vietnam.
 The meeting was the first time the Southeast Asian countries had tried to formulate a common approach to the Internet. Many of the ASEAN-member countries were concerned about the dissemination of pornography and antigovernment views over the Internet, the influence and perceived bias of the Western media, and the erosion of Asian values.
 The forum, which followed a meeting of ASEAN information ministers earlier in the year, concluded that each country should develop its own regulatory approach to cyberspace. The ASEAN delegates agreed to share information and their experiences with national regulations and “cyberlaws.”
 The forum was unable to agree on a regulatory framework for the region because of differing political views regarding censorship. Singapore, which has an estimated 150,000 Web users, is the first ASEAN country to impose regulations on access to the Internet. The city-state requires Internet providers to block access to pornographic sites and regulate political and religious discussion. On the other hand, the Philippines and Thailand support more liberal policies, calling for self- regulation by Internet access providers and minimal government intervention."

1. The meeting of the seven-nation Association of Southeast Asian Nations
(ASEAN) in September, 1996, in Singapore issued the statement ……

Chọn câu có nghĩa gần nhất với câu đã cho: As soon as you arrive, give me a call.

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks.

Nowadays, everybody knows Apples and (26) ____ everybody knows that the company was founded by Steve Jobs, an American inventor and entrepreneur. He is widely recognized as a pioneer in the field of microcomputer revolution. He helped design the first Macintosh computer, transformed a small computer graphics company into Pixar, the company behind Toy Story and The Monster Inc.

His countercultural lifestyle and philosophy was a product of the time and place of his (27) ____. Jobs was adopted and raised in San Francisco Bay Area during the 1960s. In 1972, Jobs attended Reed College from which he (28) ____ in next to no time. Jobs co-founded Apple in 1976 in order to sell Apple I personal computer. At that moment, he might hardly imagine that only a year later the company tasted impressive victory with Apple II, one of the first highly successful mass-produced personal computers. (29) ____, in 1985, following a long power struggle, Jobs was forced out of Apple. After leaving Apple, Jobs took a few of its members with him to found NeXT, a computer development company which was then bought by Apple. The purchase allowed Jobs to become the company's CEO once again.

Steve Jobs died in 2011 after battling with pancreatic cancer (30) ____ nearly a decade. Millions first learned of Jobs’ death on a device which had been invented by himself.

30................

Picture a society where learning can happen at any time, in any place and can be completed without ever going to class. This is could be new wave of education and the internet technology now exists to support such a system. The virtual classroom is here. If you are interested in English or Civil Engineering, then head to the University and click yourself a degree. Well, maybe it’s not that easy, but you would be on the right track. The flexibility of studying at your own pace, and the money you save with online courses, are two of the main attractions.
The web is a powerful educational tool. Some feel that virtual classrooms will isolate students from each other, which will result in problems developing interpersonal relationships and that these skills are much more important than computer skills. Should teachers teach kids how to behave in society, how to respect others and how to co-operate, or should kids have already learned this from their parents? No one is saying that social skills aren’t important, however, virtual classrooms are far more than just computer skills. Some strongly believe that education can be taught via the web and social skills can be gained from joining sports teams, summer camps, or just by hanging out! Others argue that this virtual classroom may place pressure on students: to become computer literate or be left behind in life. Is this undue pressure or reality? Maybe being left behind in life is a little dramatic, but the reality is that the computer age is here. Whether you want to pay for your new jeans with your debit card, or check to see if the library has the book you want, you’re going to need some computer skills.
The development of flexible, inquiring minds has rarely been the main concern in the design of educational systems. After all, if you have over thirty inquiring minds and only one teacher, flexibility could be a problem. It seems that developing students’ proper social behavior has always exceeded the concern to develop students’ creativity. Computer technology can make individualized attention a real possibility. At the Institute for the Learning Sciences, systems are being developed to allow people to try out things in simulated worlds. This technology will allow for the individual creative growth in students.
The web will provide amazing opportunities for the education of our society. Anyone with a computer and internet access can peruse effectively unlimited amounts of knowledge and programs, designed to help them learn and understand. The teachers and parents involved with these programs will be given the job of making sure that students lead well-balanced lives that combine Web-education and positive social interaction with their friends and neighbors. Imagine that your recreation room has now become your classroom, and your parents seem to be doing as much homework as you are! So, be prepared as the virtual classroom may find its way to a computer screen near you!

Why are people attracted to online education?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

   Experts in climatology and other scientists are becoming extremely concerned about the changes to our climate which are taking place. Admittedly, climate changes have occurred on our planet before. For example, there have been several ice ages or glacial periods. These climatic changes, however, were different from the modern ones in that they occurred gradually and, as far as we know, naturally. The changes currently being monitored are said to be the result not of natural causes, but of human activity. Furthermore, the rate of change is becoming alarmingly rapid.

   The major problem is that the planet appears to be warming up. According to some experts, this warming process, known as global warming, is occurring at a rate unprecedented in the last 10,000 years. The implications for the planet are very serious. Rising global temperatures could give rise to such ecological disasters as extremely high increases in the incidence of flooding and of droughts. These in turn could have a harmful effect on agriculture.

   It is thought that this unusual warming of the Earth has been caused by so-called greenhouse gases, such as carbon dioxide, being emitted into the atmosphere by car engines and modern industrial processes, for example. Such gases not only add to the pollution of the atmosphere, but also create a greenhouse effect, by which the heat of the sun is trapped. This leads to the warming up of the planet.

   Politicians are also concerned about climate change and there are now regular summits on the subject, attended by representatives from around 180 of the world’s industrialized countries. Of these summits, the most important took place in Kyotoin Japanin 1997. There it was agreed that the most industrialized countries would try to reduce the volume of greenhouse gas emissions and were given targets for this reduction of emissions.

   It was also suggested that more forests should be planted to create so-called sinks to absorb greenhouse gases. At least part of the problem of rapid climate change has been caused by too drastic deforestation. Sadly, the targets are not being met. Even more sadly, global warnings about climate changes are often still being regarded as scaremongering.

According to the passage, 1997 witnessed ____.

PANDEMIC DISEASES
Diseases are a natural part of life on earth. If there were  no diseases,  the population would grow too quickly, and there would not be enough food or other resources, so in a way, diseases are natural ways of keeping the Earth in balance. But sometimes  they  spread  very  quickly and kill large numbers of people. For example, in 1918, an outbreak of the flu spread  across the world, killing over 25 million people in only six months. Such terrible outbreaks of a disease are called pandemics.
Pandemics happen when a disease changes in a way that our bodies are not prepared to fight.  In 1918, a new type of flu virus appeared. Our bodies had no way to fight this new flu virus, and    so it spread very quickly and killed large numbers of people. While there have  been  many  different pandemic diseases throughout history, all of them have a new thing in    common.
First, all pandemic diseases spread from one person to another very   easily.
Second, while they may kill many people, they generally do not kill people very quickly. A good example of this would be the Marburg virus. The Marburg virus is an extremely infectious disease. In addition, it is deadly. About 70 -80% of all people who  get the Marburg virus  died  from the disease. However, the Marburg virus has not become  a pandemic  because most people die within three days of getting the disease. This means that the virus does not have enough time    to spread a large number of people. The flu virus of 1918, on the other hand, generally took about   a week to ten days to kill its victims, so it had more time to   spread.
While we may never be able to completely stop pandemics, we  can  make  them  less  common. Doctors carefully monitor new diseases that they fear could become pandemics. For example, in 2002, and 2003, doctors carefully watched SARS. Their health warnings may have prevented SARS from becoming a  pandemic.

The author mentions SARS in order  to    ....................

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions.

Born on June 30, 1985 in Baltimore, Maryland, to Fred and Debbie Phelps, the youngest of three children, Michael Phelps and his sisters grew up in the neighbourhood of Rodger Forge. His father, Fred, a former all-rounded athlete, was a state trooper and his mother Debbie was a middle-school principal. When Phelps's parents divorced in 1994, he and his siblings lived with their mother, with whom Michael grew very close. Even at the age of 7, Phelps was still a little scared to put his head under water, so his instructors allowed him to float around on his back. Not surprisingly, despite the fact that later he is very good at butterfly swimming, the first stroke he mastered was not the easily-practised breaststroke but the backstroke.

At the age of 15, Phelps became the youngest American male swimmer to compete at an Olympic Games in 68 years. While he didn't win any medals at the 2000 Summer Olympics in Sydney, Australia, he would soon become a major force in competitive swimming.

In the spring of 2001, Phelps set the world record in the 200-meter butterfly, becoming the youngest male swimmer in history at the age of 15 years and 9 months. At the 2001 World Championships in Japan, he then broke his own record with a time of 1:54:58, earning his first international medal. In 2002, Phelps continued to establish several records including the 100-meter butterfly and the 200-meter individual medley. The following year, at the same event, he broke his own world record in the 400-meter individual medley with a time of 4:09.09.

After the London Olympics in 2012, Phelps announced he was retiring from his sport. However, at the 2016 Olympic Games, he came out of retirement and returned to professional competition. This was also the event in which he won one silver and five gold medals, becoming the oldest individual gold medalist in Olympic swimming history, as well as the first swimmer to win four consecutive golds in the same event, the 200 meter individual medley.

The word consecutive in paragraph 3 is closest in meaning to ____.

Brown bears are found in Alaska and western Canada. They are first cousins of the grizzly, each belonging to the species Ursus arctos. The chief difference in them is size, as brown bears on the average are slightly larger. A full-grown male may weigh 1,500 pounds and stand 9 to 10 feet tall. Like bears everywhere they are creatures of habit that tread the same trails year after year. Brown bears have three gaits: an even, deliberate one that takes them over rough or boggy ground at a steady clip, a quick shuffle, and a fast gallop. They are not only surprisingly fast, but also, for such huge beasts, amazingly inclines. Fishing the streams in summer, they pounce on swift-moving salmon and snatch them with almost simultaneous movements of their paws and mouths. Brown bears are excellent swimmers and love to loll and wallow in the water on warm days. They are also curious and playful. Most manifest a fear of humans, but Alaskans prefer not to test these creatures and usually carry noisemakers of some kind to warn the bears of their presence.

The passage implies that browns bears_________

Birds that feed in flocks commonly retire together into roosts. The reasons for roosting communally are not always obvious, but there are some likely benefits, In winter especially, it is important for birds to keep warm at night and conserve precious food reserves. One way to do this is to find a sheltered roost. Solitary roosters shelter in dense vegetation or enter a cavity- horned, larks dig holes In the ground and ptarmigan burrow into snow banks- but the effect of sheltering is magnified by several birds huddling together in the roost, as wrens, swifts, brown creepers, bluebirds, and anis do. Body contact reduces the surface area exposed to the cold air, so the birds keep each other warm. Two kinglets huddling together were found to reduce their heat losses by a quarter and three together saved a third of their heat.

The second possible benefit of communal roosts is that they act as "information centers". During the day, parties of birds will have spread out to forage over a very large area. When they return in the evening some will have fed well, but others may have found little to eat. Some investigators have observed that when the birds set out again next morning, those birds that did not feed well on the previous day appear to follow those that did. The behavior of common and lesser kestrels may illustrate different feeding behaviors of similar birds with different roosting habits. The common kestrel hunts vertebrate animals in a small, familiar hunting ground, whereas the very similar lesser kestrel feeds on insects over a large area. The common kestrel roost and hunts alone, but the lesser kestrel roosts and hunts in flocks, possibly so one bird can learn from others where to find insect swarms. Finally, there is safety in numbers at communal roosts since there will always be a few birds awake at any given moment to give the alarm. But this increased protection is partially counteracted by the fact that mass roosts attract predators and are especially vulnerable if they are on the ground. Even those in trees can be attacked by birds of prey. The birds on the edge are at greatest risk since predators find it easier to catch small birds perching at the margins of the roost

What does the passage mainly discuss?

Although they are an inexpensive supplier of vitamins, minerals, and high-quality protein, eggs also contain  a high  level of blood cholesterol, one of the major causes of heart diseases. One egg   yolk, in fact, contains a little more than two-thirds of the suggested daily cholesterol limit. This knowledge has caused egg sales to plummet in recent years, which in turn has brought about the development of several alternatives to eating regular eggs. One alternative is to eat substitute eggs. These egg substitutes are not really eggs, but they look somewhat like eggs when  they are  cooked. They have the advantage of having low cholesterol rates, and they can be  scrambled  or  used  in baking. One disadvantage, however, is that they are not good for frying, poaching,  or boiling.  A second alternative to regular eggs is a new type of egg, sometimes called 'designer' eggs. These eggs  are produced by hens that are fed low-fat diets consisting of Ingredients such as canola oil, flax, and rice bran. In spite of their diets, however, these hens produce eggs that contain the same amount of cholesterol as regular eggs. Yet, the producers of these eggs claim that eating their eggs will not raise the blood cholesterol in  humans.
Egg producers  claim  that their product has been  portrayed unfairly. They cite scientific studies  to back up their claim. And, in fact, studies on the relationship between eggs and human cholesterol levels have brought mixed results. It may be that it is not the type of egg that is the main determinant   of cholesterol but the person who is eating the eggs. Some people may be  more  sensitive  to  cholesterol derived from food than other people. In fact, there is evidence that certain dietary fats stimulate the body's production of blood cholesterol. Consequently, while it still makes sense to limit one's intake of eggs, even designer eggs, it seems that doing this without regulating dietary fat will probably not help reduce the blood cholesterol  level.

What has been the cause for changes in the sale of eggs?

The Influence of Advertising on Pricing
Advertising makes an immense difference in the popularity of a product. Studies have shown that consumers usually pay more for advertised products than non-advertised products. As a result, the marketing and advertising industry is a multibillion-dollar-a-year business. Local commercials can cost as little as several hundred dollars to produce, while national companies have been known to spend hundreds of thousands of dollars on a single commercial. Interestingly, the source for these expensive commercials is the consumers who view the advertisements from the comfort of their living rooms. Companies influence the prices that consumers pay in two ways.
When consumers purchase any product, they are obviously paying for the cost of manufacturing the product. However, they are also paying for the advertising campaign devised to convince consumers to buy the product. The more costly the advertising campaign, the higher the price paid by consumers. Companies are allowed to set these high prices because consumers have shown that they will continue to pay them. For instance, a multinational chain of coffee shops significantly raised its prices a few years ago, due in no small part to an expensive national advertising campaign. While regular customers noticed and were not fond of the hike, one was quoted as saying, “I doubt it will make an impact [on consumers]. It won’t change my habit." Indeed, it did not; the company experienced record sales in spite of the fact its prices were higher than its competitors'.
Another way advertising tends to affect product pricing is seen in the arena of perceived value to the consumers. The perceived value is the worth that consumers assign to a product. Studies show that often the advertising for a product determines its value more than the quality or necessity of the product itself. One way a company may take advantage of this perceived value is by running commercials during prime time. These ads are usually much more expensive than others. For example, a national commercial that ran during a popular American show cost close to $745,000 to run for thirty seconds. If people watching the show perceive that the product is more valuable simply because it was advertised during prime time, they are often willing to pay higher prices. So, whether it is seen in the cost of the commercials or the advertiser-assigned value, it is obvious that advertising drives product pricing and directly affects consumers.

Which of the following can be inferred about pricing and advertising?

Read the following passage, then choose the correct answer to questions 26 - 30.
Jeans are very popular with (26)_________ people all over the world. Some people say that jeans are the “uniform” of youth. But they haven’t always been popular. The story of jeans (27)_________ almost two hundred years ago. People in Genoa, Italy made pants. The cloth made in Genoa was (28)_________ “jeanos”. The pants were called “jeans”. In 1850, a salesman in California began selling pants made of canvas. His name was Levi Strauss. Because they were so strong, “Levi’s pants” became (29)_________ with gold miners, fanners and cowboys. Six years later Levis began making his pants with blue cotton cloth called denim. Soon after, factory (30)_________ in the US and Europe began wearing jeans. Young people usually didn’t wear them.
(26)......................