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Just as optical fibers have transformed communication, they are also revolutionizing medicine. These ultra - thin, flxible fiers have opened a window into the living tissues of the body. By inserting optical fibers through natural openings or small incisions and the threading them along the body's established pathways, physicians can look into the lungs, intestines, heart and other areas that were formerly inaccessible to them. The basic fiber-optics system is called fiberscope, which consists of two bundles of fibers. One, the illuminating bundle, carries light to the tissues. It is coupled to a high-intensity light source. Light enters the cores of the high-purity silicon glass and travels along the fibers. A lens at the end of the bundle collects the light and focuses it into the other bundle, the imaging bundle. Each fibers in the bundle transmits only a tiny fraction of the total image. The reconstructed image can be viewed through an eyepiece or displayed on a television screen. During the last five years, improved methods of fabricating optical fibers have led to a reduction in fiberscope diameter and an increase in the number of fibers, which in turn has increased resolution. Optical fibers can also be used to deliver laser light. By use of laser beams, physicians can perform surgery inside the body, sometimes eliminating the need of invasive procedures in which healthy tissue must be cut through to reach the site of disease. Many of these procedures do not require anesthesia and can be performed in a physician's office. These techniques have reduced the risk and the cost of medical care.
2. The author uses the expression "have opened a window" to indicate that the use optical fibers .

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A group of Tri-City residents and volunteers from BC Housing gathered at a  neglected therapeutic garden on the old Riverview Hospital grounds last weekend to breathe life into a green space. First planted by psychiatric nurse Art Finnie in the 1950s after he was injured on the job, Finnie’s Garden grew into one of the first experiments in horticultural  therapy. As Lauren English, director of land development for Riverview, put it, gardening as therapy was a revolutionary practice. “He understood the value of nature and how therapeutic it was before it became the rage — to find peace and to find solace and to find comfort,” added MLA Selina Robinson, who attended last Saturday’s event.  At that time, Riverview Hospital was the largest psychiatric hospital in British Columbia, with more than 5,000 patients on site. And Finnie’s was more than a garden. Beyond the rows of corn, flowers and a fish pond, residents could lounge in a picnic area or curve bowls across their own bowling green. But while the idea of Finnie’s Garden was to have a place of gathering that residents created themselves, they weren’t the first ones to make themselves at home.  Archeologists, including one on site last weekend, have found evidence Indigenous people occupied the area for thousands of years. Today, the Kwikwetlem First Nation maintains a land claim over the Riverview lands, and in its language, the area is known as Smu’q wa ala," or “Place of the Great Blue Heron”. "They found fire-altered rocks, they found boiling rocks, they found arrowheads, they found tools," said English, under the watchful eye of the group’s archeologist. “It’s not just colonial history, it’s the precontact history that goes back thousands of years.” Today, while many of the former hospital’s buildings lay in disrepair, 184 people still call the hilltop facility home, and one day in the near future, perhaps, they’ll get to use it again on their road to recovery. The event comes in a year when Treefest was cancelled because of a lack of organizers, and while the renewed work at Finnie’s Garden isn’t meant to replace Treefest, it does offer a outlet for green-thumbs without a patch of dirt.  A final community gardening event at Finnie’s Garden will likely take place in October. By removing weeds, invasive plants and adding mulch, the group plans to have the area ready to plant next spring. 
4. The word “they” in paragraph 3 refers to _____

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
These days, most people in Britain and the US do not wear very formal clothes. But sometimes it is important to wear the right thing.
Many British people don't think about clothes very much. They just like to be comfortable. When they go out to enjoy themselves, they can wear almost anything. At theatres, cinemas and concerts you can put on what you like from elegant suits and dresses to jeans and sweaters. Anything goes, as long as you look clean and tidy.

But in Britain, as well as in the US, men in offices usually wear suits and ties, and women wear dresses or skirts (not trousers). Doctors, lawyers and business people wear quite formal clothes. And in some hotels and restaurants men have to wear ties and women wear smart dresses.
In many years, Americans are more relaxed than British people, but they are more careful with their clothes. At home, or on holiday, most Americans wear informal or sporty clothes. But when they go out in the evening, they like to look elegant. In good hotels and restaurants, men have to wear jackets and ties, and women wear pretty clothes and smart hairstyles.
It is difficult to say exactly what people wear informal or formal in Britain and the US, because everyone is different. If you are not sure what to wear, watch what other people do and then do the same. You'll feel more relaxed if you don't look too different from everyone else.

What do you think the passage is mainly about ?

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Imagine that you have an opportunity to move into one of a number of open positions  in your organization. Perhaps you are (1) ____ two different positions and you have to decide which one you want. So how do you choose the right one for you?  Having options is great: What a wonderful confidence booster! However, there’s also a lot of pressure (2) ____ to decide which option is best.  To make the right choice, you have to decide what factors are most important to you in a new job, and then you have to choose the option that best addresses these factors. (3) ____, this operates on two levels - on a rational level and on an emotional level. You’ll only truly be (4) ____ with your decision if these are aligned. You should analyze your options on both levels. First, you have to look at things rationally, looking at the job on offer, and also at the things that matter to you. Then, once you’ve understood your options on a rational (5) ____, look at things on an emotional level and think about what your emotions are telling you

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The Sahara Desert is the world’s largest hot desert. The Sahara is in North Africa and is as large as the United States. Many people think that an area like this has no animals or plant life, but they are (1) __________. In fact, the Sahara Desert has many different ‘ecoregions’. Each ecoregion has different plants and animals (2)_________there. The biggest ecoregion is called the ‘Sahara Desert ecoregion.’ In this area, the climate is extremely dry and extremely hot. The landscape is sandy and dusty with many high dunes. Because the Sahara Desert ecoregion is so hot and dry, there are very few plants and animals. Scientists estimate that there are only 500 species of plants. This is not very much when thinking of (3)_________ enormous the region is. These plants include acacia trees, palms, spiny shrubs, and grasses. The Sahara is also home to 70 species of mammals. Twenty of these are large mammals. There are about 90 species of birds and around 100 reptiles. The biggest threat to plants and animals in this environment is drying (4)_______. Because of this, plants have the ability to recover their health after their leaves have dried out completely. Animals can lose 30-60% of their body mass and still survive. Most animals do not get their water from drinking like other ecosystems. Instead, they have adapted to get their water through metabolic processes. This is why they can survive in a place (5)______ the Sahara Desert ecosystem

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Accustomed though we are to speaking of the films made before 1927 as “silent”, the film has never been, in the full sense of the word, silent. From the very beginning, music was regarded as an indispensable accompaniment; when the Lumiere films were shown at the first public film exhibition in the United States in February 1896, they were accompanied by piano improvisations on popular tunes. At first, the music played bore no special relationship to the films; an accompaniment of any kind was sufficient. Within a very short time, however, the incongruity of playing lively music to a solemn film became apparent, and film pianists began to take some care in matching their pieces to the mood of the film.
As movie theaters grew in number and importance, a violinist, and perhaps a cellist, would be added to the pianist in certain cases, and in the larger movie theaters small orchestras were formed. For a number of years the selection of music for each film program rested entirely in the hands of the conductor or leader of the orchestra, and very often the principal qualification for holding such a position was not skill or taste so much as the ownership of a large personal library of musical pieces. Since the conductor seldom saw the films until the night before the y were to be shown (if, indeed, the conductor was lucky enough to see them then), the musical arrangement was normally improvised in the greatest hurry.
To help meet this difficulty, film distributing companies started the practice of publishing suggestions for musical accompaniments. In 1909, for example, the Edison Company began issuing with their films such indications of mood as “pleasant’, “sad”, “lively”. The suggestions became more explicit, and so emerged the musical cue sheet containing indications of mood, the titles of suitable pieces of music, and precise directions to show where one piece led into the next.

Certain films had music especially composed for them. The most famous of these early special scores was that composed and arranged for D. w. Griffith’s film Birth of a Nation, which was released in 1915.

The passage mainly discusses music that was     .

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometres in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the tune it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word "radar" in fact gets its name from the term "radio detection and ranging". "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots radar is essential for air traffic control tracking ships at sea, and for tracking weather Systems and storms

The word "tracking" in the passage most closely means...............................

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Scientists believe that something very serious is happening to the Earth. It is becoming warmer. Scientists predict that there will be major changes in the climate during the 21st century. Coastal waters will have higher temperatures. This will have a serious effect on agriculture. Farmers will have trouble producing good crops. In warm regions, the weather will be too dry. The amount of water could decrease by 50 per cent. This would cause a large decrease in agricultural production. World temperatures could increase from 1.5 to 5.6 degrees Celsius by the middle of the 21st century. And the increase in temperature could be even greater in the Arctic and Antarctic regions. A rise in temperature could cause the great ice sheets to melt, which, in turn would raise the level of oceans by one to two meters. Many coastal cities would be underwater. Why is all this happening? The Earth and its atmosphere are kept warm by the Sun. The atmosphere lets most of the light from the Sun pass through to warm the Earth. The Earth is warmer by the sunlight and sends heat energy back into the atmosphere. Much of this energy escapes from the Earth’s atmosphere. However, some of it remains. Gases such as carbon dioxide, ozone and water vapor absorb this energy and create more heat. Then, this heat is sent back down to Earth, and the Earth becomes warmer. Recently, however, an increase of carbon dioxide in the atmosphere is causing serious problems. Too much carbon dioxide in the atmosphere prevents heat energy from escaping. Too much heat is sent back down to the Earth, and the amount of carbon dioxide in the atmosphere continues to increase. When oil, gas, and coal burn, they create large amounts of carbon dioxide. The destruction of rain forests that absorb carbon dioxide also helps to increase the amount of carbon dioxide in our atmosphere. Some scientists believe that the amount of carbon dioxide in the air will double by the late 2000s. Scientists call this warming of the Earth and its atmosphere “the greenhouse effect”. A greenhouse, made of glass and plastic, is a special place where plants are grown. The sunlight passes through the glass or plastic and warms the air inside. The heat inside escapes very slowly, so the greenhouse remains very warm. This is exactly what is happening on the Earth. Another reason why the Earth is growing warmer is because of the amount of ozone in our atmosphere. Ozone is a form of oxygen. In the upper atmosphere, very far from the Earth, a layer of ozone helps to protect the Earth from 95 percent of the harmful light that comes from the sun. If your skin receives too much of this light, you would develop skin cancer. We need the ozone layer to protect ourselves. But the ozone layer is in trouble. Scientists have observed that the ozone layer is becoming thin, and above Antarctica there is a hole. This allows too much of the sun’s dangerous light into our atmosphere and makes the Earth warmer. Scientists say we must start making changes and planning now. We need to continue to do research, so we can predict what will happen in the future. We must burn less coal, oil, and gas. Other scientists believe that the problem is not so serious. They think that the Earth is growing warmer naturally, that we don’t need to worry about it now, and that we should just get ready for life in the warmer climate. Most scientists agree that the causes of the world’s climate are very complicated. They say that we must continue to measure the amount of carbon dioxide and ozone in the atmosphere. Scientists also encourage people to learn about the changes that are occurring in the world and how we can all help protect our atmosphere  
8. Which is the best title for the passage?

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In the folklore of the Navajo people, it was said that frogs and toads fell from the sky when it (1)________. The phenomenon that gave rise to this belief involved the spade foot toad, which remains dormant beneath the Sonoran Desert of Arizona, (2)_________ the heat and drought for as long as eight or nine months. With the onset of summer thunderstorms, however, the toads respond to the vibrations of drumming raindrops and emerge, as if fallen from the sky with the rain, (3)__________their brief and frantic mating season. The male spade foot sits in a muddy pool and fills the night with his calls, attempting to attract a female of the same species. Once a female joins him, she may lay as many as 1,000 eggs in the small pool of rainwater. From that point it’s a race against the elements for the young, (4)_________ must hatch and mature with remarkable speed before the pool evaporates beneath the searing desert sun. As the pool grows smaller and smaller, it became thick with tadpoles fighting for survival in the mud, threatened not only by the loss of their watery nest but also by devouring insects and animals. In as few as nine days after fertilization of the eggs, those lucky enough to survive develop through each tadpole stage and finally emerge as fully formed toads. After (5)______ themselves on insects, the young toads like their parents, burrow underground, where they will lie dormant awaiting the next summer’s storms

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 following questions:
A fold culture is small, isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race, with a strong family or clan structure and highly developed rituals. Order is maintained through sanctions based in the religion or family, and interpersonal relationships are strong. Tradition is paramount, and change comes infrequently and slowly. There is relatively little division of labor into specialized duties. Rather, each person is expected to perform a great variety of tasks, though duties may differ between the sexes. Most goods are handmade, and a subsistence economy prevails. Individualism is weakly developed in folk cultures, as are social classes. Unaltered folk cultures no longer exist in industrialized countries such as the United States and Canada. Perhaps the nearest modern equivalent in Anglo-America is the Amish, a German American farming sect that largely renounces the products and labor saving devices of the industrial age. In Amish areas, horse-drawn buggies till serve as a local transportation device, and the faithful are not permitted to own automobiles. The Amish's central religious concept of Demut, “humility”, clearly reflects the weakness of individualism and social class so typical of folk cultures, and there is a corresponding strength of Amish group identity. Rarely do the Amish marry outside their sect. The religion, a variety of the Mennonite faith, provides the principal mechanism for maintaining order.
By contrast, a popular culture is a large heterogeneous group, often highly individualistic and constantly changing. Relationships tend to be impersonal, and a pronounced division of labor exists, leading to the establishment of many specialized professions. Secular institutions, of control such as the police and army take the place of religion and family in maintaining order, and a money-based economy prevails. Because of these contrasts, “popular” may be viewed as clearly different from “folk”. The popular is replacing the folk in industrialized countries and in many developing nations, Folk- made objects give way to their popular equivalent, usually because the popular item is more quickly or cheaply produced, is easier or time saving to use, or lends more prestige to the owner.

Which of the following is typical of folk cultures?

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The world is losing languages at an alarming rate. Michael Krauss suggested that of the approximately 6,000 human languages alive today, only 350 to 500 are safe from extinction. Some linguists estimate that a language dies every two weeks or so. At the current rate, by 2100, about 2,500 native languages could disappear. Languages become extinct for many reasons. Through imperialism, colonizers impose their languages on colonies. Some politicians believe multilingualism will fragment national interests. Thus they prohibit education in all but the national language. Another reason for language death is the spread of more powerful languages. In the world today, several languages, including English, are so dominant in commerce, science, and education, that languages with fewer speakers have trouble competing. Although in the past, governments have been one of the primary causes of language death, many have now become champions of preserving endangered languages and have had some significant successes. Two outstanding examples are the revival of Hebrew and Irish. Hebrew was considered a dead language, like Latin, but is now the national language of Israel. Irish was not dead, but severely threatened by English when the government of Ireland began its rescue immediately after the establishment of the Irish Free State in 1922. All students in public schools must now take some classes in Irish and there are Irish programs in major media, such as television and radio. According to the Irish government, approximately 37% of the population of Ireland now speaks Irish. One of the largest programs to revive languages, Documenting Endangered Languages (DEL), is being conducted by three U.S. government agencies: the National Science Foundation, the National Endowment for the Humanities, and the National Museum of Natural History. Researchers funded by these agencies are recording interviews with the mostly elderly people who still speak the languages. Analyses of these interviews will help linguists publish dictionaries and grammars of the languages. Eventually, linguists hope to establish language-training programs where younger people can learn the languages, carrying them on into the future. The linguists participating in DEL defend spending millions of dollars to preserve dying languages. They point out that when a language dies, humanity loses all of the knowledge of the world that that culture held. Traditional healers in rural areas have given scientists important leads in finding new medicines; aspirin is an example of these. But one of the most common reasons given by these researchers is that studying languages gives us insight into the radically different way humans organize their world. David Lightfoot, an official at the National Science foundation, gives the example of Guguyimadjir, and Australian aboriginal language, in which there are no words for “right” or left,” only for “north,” “south,” “east,” and “west.” Many researchers are optimistic that the efforts to save dying languages will succeed, at least in part. Bruce L. Cole, Chairman of the National Endowment for the Humanities, said, “Not only is this a time of great potential loss, it is also a moment for enormous potential gain. In this modern age of computers and our growing technological capabilities, we can preserve, assemble, analyze, and understand unprecedented riches of linguistic and cultural information.”
2. According to the passage, which language is a dead language?

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Would you believe that your diet can make a big difference in keeping a youthful appearance? It seems strange to think that the food we take in could result in fewer wrinkles. Wouldn’t it be better to put things on our skin rather than in our mouths? Well, according to one scientific theory, our bodies start aging because of oxidation. This is caused by certain oxygen-containing molecules in our cells, called free radicals. Free radicals have the capability to attach to and damage parts of our cells, including our DNA. Our bodies have the ability to repair this damage. However, as we get older, these repair mechanisms start to break down, resulting in signs of aging, such as wrinkles. Free radicals are actually produced by our bodies, but their numbers can also increase because of the food we eat. Besides avoiding foods that could potentially produce more free radicals, eating foods that contain certain vitamins and micro-nutrients can also keep us looking young. These vitamins help produce molecules called antioxidants, which actually help reduce the production of free radicals. Even better, foods containing antioxidants are not rare. Common antioxidants, like vitamins A and E, can be found in many dark-colored vegetables. For example, carrots, seaweed, spinach, and broccoli are all excellent sources of these helpful vitamins. Also, you can eat orange-colored fruits like apricots and peaches. Vitamins A and E are particularly good for helping your skin remain young-looking. These nutrients strengthen your skin and make it soft. However, if you really want to stock up quickly on nutrients that benefit your skin, you should eat cow’s liver. One small piece of cooked cow’s liver contains twice as much vitamin A as half a cup of cooked carrots.  More recently, green tea has also been tentatively added to the list of youthpromoting substances. Research on green tea’s effects on our bodies is still in the early stages. Scientists certainly believe that it is good for us, but they are cautious about predicting its ability to keep us looking youthful. However, recent experiments seem to show that green tea’s antioxidant properties can repair cell damage already sustained as well as prevent damage in the future. In fact, green tea works even better if you apply it directly to your skin as an ingredient in facial cream. “You are what you eat.” The more we find out about how our bodies work, the more this old proverb seems to be true. Think about that the next time you sit down at the table.  
2. According to the scientific theory in paragraph 2, the repair mechanisms in our body _____.

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Aside from the ability to delay normal cognitive decline as we age, there are significant social benefits to lifelong learning. Habitual learners are more likely to put themselves (1) ____ new and challenging social situations throughout life. Learning is by definition a social activity; (2) ____, we often develop connections with other people who have knowledge we would like to learn, or who are equally interested in learning about a new topic. Viewing socialization through the educational lens (3) ____ corresponding results: we are more likely to participate in social engagements as older adults when we are lifetime learners, probably due to the (4) ____ self-esteem that comes with the achievement of a task. Science has shown that aging adults (5) ____ have strong social connections live longer, and lifetime learning is an ideal way to build those support networks

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Do you know that your place on the family ladder may have certain effects on the sort of person you grow up to be? You may be the only child, the eldest, youngest or (1) _______ one; you may be the youngest of three boys or the eldest girl with a younger brother and sister. All the different combinations of relationships will have helped to (2) __________ you the person you are. The number of years between your siblings and you also helps to shape your character. Knowing such details about your best friend or loved one (3) _______ also tell you about the type of friend or partner he needs. For example, a boy with a younger sister would normally get along much better (4) ______ a girl who has an older brother than with a girl who has a younger brother. Similarly, if your girlfriend is the oldest in her family, she would probably be domineering. Fortunately for all of us, family psychology is not (5) _______ accurate. There are always exceptions to the rule. Most important of all, we should always judge people according to who they are, not the relatives they have

Rewrite the sentence:
The valley is so dangerous to live in.

Choose the best answer:
I called the dentist ___________ an appointment to meet him this weekend.

Rewrite the sentence:
It’s convenient to use correction pen for correcting errors.

Each sentence has a mistake. Findit by chosing A B C or D

Children raised in foster homes requirement special attention to overcome the feelings of abandonment and isolation

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Many AI researchers roll their eyes when seeing this headline: “Stephen Hawking warns that rise of robots may be disastrous for mankind.” And as many have lost count of how many similar articles they’ve seen. Typically, these articles suggest we should worry about robots rising up and killing us because they’ve become conscious and/or evil. On a lighter note, such articles are actually rather impressive, because they succinctly summarize the scenario that AI researchers don’t worry about. That scenario combines as many as three separate misconceptions: concern about consciousness, evil, and robots. If you drive down the road, you have a subjective experience of colors, sounds, etc. But does a self-driving car have a subjective experience? Does it feel like anything at all to be a self-driving car? Although this mystery of consciousness is interesting in its own right, it’s irrelevant to AI risk. If you get struck by a driverless car, it makes no difference to you whether it subjectively feels conscious. In the same way, what will affect us humans is what superintelligent AI does, not how it subjectively feels. The fear of machines turning evil is another red herring. The real worry isn’t malevolence, but competence. A superintelligent AI is by definition very good at attaining its goals, whatever they may be, so we need to ensure that its goals are aligned with ours. Humans don’t generally hate ants, but we’re more intelligent than they are – so if we want to build a hydroelectric dam and there’s an anthill there, too bad for the ants. The beneficial-AI movement wants to avoid placing humanity in the position of those ants In fact, the main concern of the beneficial-AI movement isn’t with robots but with intelligence itself: specifically, intelligence whose goals are misaligned with ours. To cause us trouble, such misaligned superhuman intelligence needs no robotic body, merely an internet connection – this may enable outsmarting financial markets, out-inventing human researchers, out-manipulating human leaders, and developing weapons we cannot even understand. Even if building robots were physically impossible, a super-intelligent and superwealthy AI could easily pay or manipulate many humans to unwittingly do its bidding. The robot misconception is related to the myth that machines can’t control humans. Intelligence enables control: humans control tigers not because we are stronger, but because we are smarter.  
4. The word “subjective” in paragraph 2 is closest in meaning to _______

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Industrialization has provided us with material comfort and modem (1) ____. Electrical appliances and efficient gadgets ease our daily chores. Yet, there is a heavy price tag attached to this convenience. Large-scale industrialization is killing the world. Today there is a strong emphasis on the halt of CFC usage. CFCs, otherwise known as chloro-fluoro-carbons, are ozone depleting chemicals. They (2) ____ burn a hole in the earth’s atmosphere and we, on the Earth, suffer from the strong radiation (3) ____ by the sun’s rays. Household (4) ____ like refrigerators, aerosol cans, air-conditioners and styrofoam containers contain ozone depleting chemicals. The hole in the sky allows harmful radiation to reach the Earth. As a result, the temperature on the Earth will (5) ____. This is alarming because polar ice-caps will melt in the heat. Ocean levels will rise and islands will gradually be flooded

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Facebook users spend an average of more than 15 hours a month on the social  networking site. While there are plenty who caution against such intensive use — and there are a number of studies detailing the harm Facebook could potentially cause — there also are lots of reports extolling the site’s virtues. As the social media giant prepares for its upcoming initial public offering, here are some ways Facebook just might be good for you.  Spending time on Facebook can help people relax, slow down their heart rate and decrease stress levels, according to researchers from the Massachusetts Institute of Technology and the University of Milan. In a study published earlier this year, researchers studied 30 students and found that a natural high was sparked when they were on the social media network that led to the relaxed heart rates and lower levels of stress and tension. In the study, the students were monitored in three situations: looking at panoramic landscapes, performing complicated mathematical equations and using Facebook. While the first situation was the most relaxing to students and the math problems were the most stressful, the time on Facebook uncovered high levels of attractiveness and arousal. The findings support the researchers’ hypothesis that Facebook’s success, as well as that of other social media networks, correlates to the specific positive mental and physical state users experience.  While many may argue that social media networks only distract employees, research shows the opposite may be true. Research from Keas.com found that a 10-minute Facebook break makes employees happier, healthier and more productive. The study examined workers in three groups: one that was allowed no breaks, one that was allowed to do anything but use the Internet and one that was allowed 10 minutes to use the Internet and Facebook. The Facebook group was found to be 16 percent more productive than the group that was not allowed to use the Internet and nearly 40 percent more productive than the group that was allowed no breaks. “Short and unobtrusive breaks, such as a quick surf on the Internet, enables the mind to rest itself, leading to a higher net total concentration for a day’s work, and as a result, increased productivity,” said Brent Coker of the department of management and marketing at the University of Melbourne in Australia.  Facebook is also in the business of matchmaking. Research shows that nearly 60 percent of singles will friend someone new on Facebook after meeting them in person. If they like what they see, 25 percent are likely to contact their new love interest via Facebook. Once the courting is over, nearly 40 percent of those social networking adults will update their relationship status on Facebook, with just 24 percent telling their friends first. Facebook use between couples will continue through the dating process, the research shows. Throughout the day, 79 percent of couples said they send partners Facebook messages or chat on the social network. In addition, more than 60 percent would post romantic messages on their significant other’s Facebook wall. When the relationship ends, more than half of those surveyed immediately update their status to single, which automatically sends out a notification to their friend list to start the dating cycle over again
4. The word “one” in paragraph 3 refers to __________