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In America, when dining, people consider it rude for a guest or dining partner to belch or burp, eat with an open mouth, smack, or lick your fingers. Napkins, generally provided are available at every meal and should be placed in one's lap and then used throughout the meal to   clean one's fingers and mouth.
It is acceptable to refuse additional servings of food by saying "No, thank you" and the host  or hostess will not be insulted if you do so. Similarly, if you leave a small amount of uneaten food on your plate at a restaurant or in a home, it is not considered an insult. If you eat everything on the plate, a host or hostess may possibly feel that they have not prepared enough food and might be embarrassed. People in the United States serve and eat food with either hand, but never take food from a communal serving dish with their hands. Generally, a serving utensil is used.
Americans typically use forks, spoons and knives to eat, but there are some types of foods that   are acceptable to eat with one's fingers, like sandwiches or pizza. When in doubt, look to see what others are doing. In formal dining situations, if you wonder whether or not it is acceptable to begin eating, you should wait until the oldest woman (or oldest man if no  women  are  present) begins to eat. When  eating, do not pick up the bowl or plate from the table to hold underneath your mouth, Even noodles, soup, and rice are eaten with the plate or bowl remaining on the table. When consuming soup and hot liquids, it is considered impolite to slurp - do not do this. When consuming noodles, twirl them around your fork and then put it in your mouth.
If you are a man taking out a woman for dinner, you are almost always expected to pay. This is for the woman to gauge your intentions and interest with her. For example, taking a woman for coffee, versus tacos, versus a fancy dinner, versus for drinks at 11:30pm, all signal many different things to them. So, the date is a -test- of many. Paying is just as important as where you take her, and how late. So, don't assume she is just trying to get a "free meal". Most girls aren't. Also, if you are going out with a friend to eat, almost always, the bill is expected to be split in half, or each person pays for themselves.
If you are eating in a restaurant, you will be expected to add a 15 to 20 % tip for the server to  your bill. In America, wait staff might occasionally stop by your table to ask how your meal is, which is considered good service. They will also bring you your check when it seems reasonable that you are finished with your meal, however this is not necessarily an indication that you must leave right away (Do not be too embarrassed to ask for the check either waiters and waitresses cannot read minds.) Take your time to finish your meal, and unless there is a line of people waiting at the door, it is not considered  rude to linger at your table for as long as you like.

The word "linger" in the last paragraph is closest in meaning to    _.

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A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which  has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance.

The word "woolly" as used in line 1 refers to the animal's

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These days, most people in Britain and the US do not (1)........ very formal clothes. But sometimes it is important to wear the right thing.
Many British people don't think (2)........... 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 (3).............. you like from elegant suits and dresses to jeans and sweaters. Anything goes, as long as you (4)......... 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 (5)............hotels and restaurants men have to wear ties and women wear smart dresses.

(1)...........................................

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Throughout history, women have had responsiblity for healing the sick. However, it is only in ccomparative recent times that they have been allowed to train as doctors at medical schools in Britain. Yet in that short time, they have (61)....... an enormous contribution to modern medicine.
The first female doctors were nuns (62)........._ gave advice about diseases and (63)......... and prepared medicnes. In ancient Rome, women healers were considered skillful and respected. In Britain, for centuries, male doctors were suspicious of women who pratised medicine (64) ..........and in 1512 a law was passed making it illegal for them to do so. Women coulnd’t study medicine at universities (65).......... the 19th century and they only began to gain equality with male doctors in the 20th century.
(64)...........................

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Lunar New Year, or Tet, is considered the (1) ______ festival and holiday in Vietnam. All schools, companies, and factories are temporarily closed. It is the occasion for family (2) __________ when people return to their families. To prepare for this particular day, most Vietnamese people prepare by cleaning and (3) _____________ their houses as well as cooking delicious foods. There are a lot of special Vietnamese customs during this time that you could learn. For example, the (4) ________ of the first person visiting the house on the new year, wishing greetings of New Year, ancestral worship, and giving lucky money to elderly people and children. During Tet, Vietnamese people will visit their relatives, and go to pagodas and temples (5) ___________ for a better upcoming year.
2. It is the occasion for family (2) __________ when people return to their families.

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Most desert animals will drink water if confronted with it, but many of them never have any opportunity. All living things must have water, or they will expire. The herbivores find it in desert plants.
The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only  minuscule amounts in his excreta and through evaporation from his respiratory tract.
Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body weight. There was no trend toward a decrease in water content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water itent in their bodies, which remained at 66.3 % to 67.2 % during this period. This is very close to the water content of dry-fed animals (66.5 %), and the availability of free water, therefore, did not lead to any “storage” that could be meaningful as a water reserve. This makes it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat’s ability to live on dry food.

The word “expire” in paragraph 2 is closest in meaning to     .

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Global warming is the current increase in temperature of the Earth’s surface (both land and water) as well as its atmosphere. Average temperature around the world have risen by 0.75°C (1.4°F) (1)....... the last 100 years. About two thirds of this increase has occured since 1975 in the past, when the Earth experienced increases in temperature it was the result of natural causes, but today it is being caused by accumulation of greenhouse gases in the atmosphere produced by human(2)........... .
The natural greenhouse effect maintains the Earth’s temperature at a safe level making it (3)...............for humans and many other life forms to exist. However, since The Industrial Revolution what benefits human has significantly enhanced the greenhouse effect (4)............ the Earth’s average temperature to rise by almost 1°C. This is creating the global warming (5)..............we see today

(1)...................................... 

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Although management principles have been implemented since ancient times, most management scholars trace the beginning of modern management thought back to the early 19005, beginning with the pioneering work of Frederick Taylor (1856-1915) Taylor was the first person to study work scientifically. He is most famous for introducing techniques of time and motion study, differential piece rate systems, and for systemtically specializing the work of operating employees and managers. Along with other pioneers such as Frank and Lillian Gilbreth, Taylor set the stage, labeling his philosophy and methods “scientific management’. At that time, his philosophy, which was concerned with productivity, but which was often misinterpreted as promoting worker interests at the expense of management, was in marked contrast to the prevailing industrial norms of worker exploitation.
The time and motion study concepts were popularized by Frank and Lillian Gilbreth. The Gilbreths had 12 children. By analyzing his children’s dishwashing and bed making chores, this pioneer efficiency expert, Frank Gilbreth, hit on principles whereby workers could eliminate waste motion. He was memorialized by two of his children in their 1949 book called “Cheaper by the Dozen”.
The Gilbreth methods included using stop watches to time worker movements and special tools (cameras and special clocks) to monitor and study worker performance, and also involved
identification of “therbligs” (Gilbreth spelled backwards) - basic motions used in production jobs. Many of these motions and accompanying times have been used to determine how long it should take a skilled worker to perform a given job. In this way an industrial engineer can get a handle on the approximate time it should take to produce a product or provide a service. However, use of work analysis in this way is unlikely to lead to useful results unless all five work dimensions are considered. physical, psychological, social, cultural, and power.

According to the passage, Frank Gilbreth discovered how workers could eliminate waste motion by     .

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Diversity is a hallmark of life, an intrinsic feature of living systems in the natural world. The demonstration and celebration of this diversity is an endless rite. Look at the popularity of museums, zoos, aquariums and botanic gardens. The odder the exhibit, the more different it is from the most common and familiar life forms around us, the more successful it is likely to be. Nature does not tire of providing oddities for people who look for them. Biologists have already formally classified 1.7 million species. As many as 30 to 40 million more may remain to be classified. (1)
Most people seem to take diversity for granted. If they think about it at all they assume it exists in endless supply. Nevertheless, diversity is endangered as never before in its history. Advocates of perpetual economic growth treat living species as expendable. As a result an extinction crisis of unprecedented magnitude is under way. Worse yet, when diversity needs help most, it is neglected and misunderstood by much of the scientific community that once championed it. (2)
Of the two great challenges to the legitimacy of this diversity, the familiar one comes primarily from economists. Their argument, associated with such names as Julian Simon, Malcolm McPherson and the late Herman Kahn, can be paraphrased: "First, if endangered species have a value as resources - which has been greatly exaggerated - then we should be able to quantify that value so that we can make unbiased, objective decisions about which species, if any, we should bother to save, and how much the effort is worth. Secondly, the global threat to the diversity of species, particularly in the tropics, has been overestimated. Thirdly, we have good substitutes for the species and ecosystems that are being lost, and these substitutes will nullify the damage caused by the extinctions". (3)
The structure of the argument seems to me to be identical in form to that of an old joke from the American vaudeville circuit. One elderly lady complained to another about her recent vacation at a resort in the Catskill Mountains in New York State. "The food was terrible", she moaned. "Pure poison, I couldn't eat a bite. And the portions were so tiny!" (4)
Species may be valuable, but not especially so, and the threat to them has been exaggerated. But this does not matter anyway, say the economists, because we can replace any species that vanishes.(5) 
It is not clear how much of an impact this argument has on the informed public, but it has certainly provoked an outcry among scientific conservationists. It has set the terms for, and dominated, most of the pro-diversity literature of the past few years, making it a literature of response, thus limiting its scope and creative force.

The position of the scientific conservationists has been weakened because they have

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Air  pollution  occurs  when  wastes  dirty  the  air.  People  produce  most  of  the  (1)........that cause air pollution. Such wastes can be in the form  of  gases  or  particles  of  solid  or  liquid matter. These substances result chiefly from burning (2).............. to power motor vehicles and to heat buildings. Industrial processes and the (3)...............of garbage also contribute to air pollution. Natural pollutants (impurities) include dust, pollen, soil particles, and naturally occurring gases.
The rapid growth of population and industry and the increasing use of automobiles and airplanes   have made air  pollution a (4)............. problem. The air we breathe has become so filled with  pollutants that  it  can cause (5)...........problems. Polluted air also harms plants, animals, building materials, and fabrics. In addition, it causes damage by altering the earth’s atmosphere.
(3).................................

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In 1900 the United States had only three cities with more than a million residents-New York, Chicago, and Philadelphia. By 1930, it had ten giant metropolises. The newer ones experienced remarkable growth, which reflected basic changes in the economy. The population of Los Angeles (114,000 in 1900) rose spectacularly in the early decades of the twentieth century, increasing a dramatic 1,400 percent from 1900 to 1930.
A number of circumstances contributed to the meteoric rise of Los Angeles. The agricultural potential of the area was enormous if water for irrigation could be found, and the city founders had the vision and dating to obtain it by constructing a 225-mile aqueduct, completed in 1913, to tap the water of the Owens River. The city had a superb natural harbor, as well as excellent rail connections. The climate made it possible to shoot motion pictures year-round; hence Hollywood not only supplied jobs but also disseminated an image of the good life in Southern California on screens all across the nation. The most important single industry powering the growth of Los Angeles, however, was directly linked to the automobile. The demand for petroleum to fuel gasoline engines led to the opening of the Southern California oil fields, and made Los Angeles North America’s greatest refining center.
Los Angeles was a product of the auto age in another sense as well: its distinctive spatial organization depended on widespread private ownership of automobiles. Los Angeles was a decentralized metropolis, sprawling across the desert landscape over an area of400 square miles.
It was a city without a real center. The downtown business district did not grow apace with the city as a whole, and the rapid transit system designed to link the center with outlying areas withered away from disuse. Approximately 800,000 cars were registered in Los Angeles County in 1930, one per 2.7 residents. Some visitors from the east coast were dismayed at the endless urban sprawl and dismissed Los Angeles as a mere collection of suburbs in search of a city. But the freedom and mobility of a city built on wheels attracted floods of migrants to the city.

What is the passage mainly about?

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                   The texting pigeons
Not everybody recognizes the benefits of new developments in communnicatons technology. Indeed, some people fear that text messaging may actually be having a negative (11).....on your people’s communication and language skills, especially when we hear that primary school children may be at rick of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. (12)........ , in this case, it’s difficult to view the results as anything but positive.
Twenty of the birds are about to take to the skies with the task of measuring air pollution, each (13)................with sensor equipment and a mobile phone. The readings made by the sensors will be automatically converted into text messages and beamed to the Internet – (14)...............they will appear on a dedicated ‘pigeon blog’. The birds will also each have a GPS receiver and a camera to capture aerial photos, and researchers are building a tiny ‘pigeon kit’ containing all these gadgets. Each bird will carry these in a miniature backpack, (15)............ , that is, from the camera, which will hang around its neck.
 The data the pigeons text will be displayed in the form of an interactive map, which will provide local residents with up-to-the-minute information on thir local air quality.(11)....................

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Although social changes in the United States were being wrought throughout most of the nineteenth–century, public awareness of the changes increased to new levels in the 1890's. The acute, growing public awareness of the social changes that had been taking place for some time was tied to tremendous growth in popular journalism in the late nineteenth century, including growth in quantity and circulation of both magazines and newspapers. These developments, in addition to the continued growth of cities, were significant factors in the transformation of society from one characterized by relatively isolated self–contained communities into an urban, industrial nation. The decade of the 1870's, for example, was a period in which the sheer number of newspapers doubled, and by 1880 the New York Graphic had published the first photographic reproduction in a newspaper, portending a dramatic rise in newspaper readership. Between 1882 and 1886 alone, the price of daily newspapers dropped from four cents a copy to one cent, made possible in part by a great increase in demand. Furthermore, the introduction in 1890 of the first successful linotype machine promised even further growth. In 1872 only two daily newspapers could claim a circulation of over 100,000, but by 1892 seven more newspapers exceeded that figure. A world beyond the immediate community was rapidly becoming visible.
But it was not newspapers alone that were bringing the new awareness to people in the United States in the late nineteenth century. Magazines as they are known today began publication around 1882, and, in fact, the circulation of weekly magazines exceeded that of newspapers in the period which followed. By 1892, for example, the circulation of the Ladies' Home Journal had reached an astounding 700,000. An increase in book readership also played a significant part in this general trend. For example, Edward Bellamy's utopian novel, Looking Backward, sold over a million copies in1888, giving rise to the growth of organizations dedicated to the realization of Bellamy's vision of the future. The printed word, unquestionably, was intruding on the insulation that had characterized United States society in an earlier period.

Why does the author mention Edward Bellamy's novel Looking Backward?

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                           Swim, Cycle, and Run
For athletes who like to (1).............. a variety of endurance sports in a single race, triathlons are a great fit. These competitions (2)......... running, cycling, and swimming into one race, and they take place one after the other in a single continuous timed race. Athletes who participate must be in top physical form and have the skills needed to complete each portion of the race.
 Training for triathlons means the athletes have to become proficient not only in the sport required in each stage, but they also have to become familiar with what (3).............  from one to the other does to their bodies. Many inexperienced triathletes are surprised to (4)............... hard it can be to switch from swimming to cycling to running, and how tired their muscles can suddenly feel. One thing all triathletes can agree (5).................is that no one ever told them that running a triathlon would be easy.

(5)..............................

Read the following passage and choose the best answer for each blank.

The General Certificate of Secondary Education or the GCSE examinations for (26) _____ are the standard school-leaver qualifications taken by (27) _____ all UK students in the May and June following their 16th birthday. If you come to a UK (28) _____ school before you (29) _____ the age of 16, you will study towards GCSE examinations in up to 12 subjects. Some subjects are compulsory, including English arid mathematics, and you can select (30) _____, such as music, drama, geography and history from a series of options. GCSEs provide a good all-round education (31) _____ you can build on at college and eventually at university. AS- and A-levels are taken after GCSEs. They are the UK qualifications most (32) _____ accepted for entry to university and are available in subjects from the humanities, arts, sciences and social sciences as well as in (33) _____ subjects such as engineering, and leisure and tourism. You can study up to four subjects at (34) _____ same time for two years, (35) _____ AS-level examinations at the end of your first year (called the lower-sixth) and A-level qualifications at the end of your second year (called the upper-sixth).

(27) _____

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She wants to be a singer; you think she should go for a long–term career with job security and eventually retire with a good pension. But a new report suggests that in fact she’s the practical one. Why do parents make terrible career advisers?
Today’s 14 and 15–year–olds are ambitious. They are optimistic about their prospects, but their career ideas are rather vague. Although 80% of them have no intention of following in their parents’ footsteps, 69% still turn to their parents for advice. They look at their working future in a different way to their parents.
A job for life is not in their vocabulary; neither is a dead–end but secure job that is boring but pays the bills. Almost half the boys surveyed expected that their hobbies would lead them into the right sort of job, while most girls seemed determined to avoid traditionally female careers such as nursing.
In the past, this might have counted as bad news. Certainly when I was 15, my guidance counsellors were horrified at my plans to become a writer. I’m glad I didn’t change my plans to suit them. Even so, their faith in rigid career paths was well–founded. In those days, that was the way to get ahead.
But the world has changed. The global economy is not kind to yesterday’s diligent and dependable worker. The future belongs to quick–thinking people who are resourceful, ambitious and can take the initiative. This means that a 14–year–old who sees her working future as a kind of adventure, to be made up as she goes along is not necessarily being unrealistic.
However, she has to have the training and guidance to help her develop the right skills for today’s market; not the rigid preparation for a workplace that disappeared twenty years ago. Many young people are very aware of the pitfalls of the flexible workplace; they understand that redundancy, downsizing and freelancing are all part of modern working life, but no one is telling them how they might be able to turn the new rules of the employment game to their advantage. This is what they need to know if they are to make a life for themselves.

So what is to be done? A good first step would be to change the way in which schools prepare young people for adult life. The education system is becoming less flexible and more obsessed with traditional skills at just the time that the employment market is going in the opposite direction.
Accurate, up–to–date information on new jobs and qualifications can help guidance counsellors to help their students. Young people need solid information on the sort of training they need to pursue the career of their dreams. Also, a little bit of encouragement can go a long way. If nothing else, a bit of optimism from an adult can serve as an antidote to the constant criticism of teenagers in the press.
What, then, can we as parents do to help them? The best thing is to forget all the advice that your parents gave you, and step into your teenager’s shoes. Once you’ve done that, it’s easier to see how important it is that they learn how to be independent, resourceful and resilient. Give them the courage to follow their dreams –however odd they might sound right now. In a world that offers economic security to almost no one, imagination is a terrible thing to waste.

How does the writer think the global economy has affected the employment market?

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In the twentieth - century, people depend on unlimited energy to power their everyday lives. A wide range of energy-run devices and modern conveniences are taken for granted, and although it may seem that we will never be in danger of living without those conveniences, the fact is that many supplies of energy are dwindling rapidly. Scientists are constantly searching for new sources of power to keep modern society running. Whether future populations will continue to enjoy the benefits of abundant energy will depend on the success of this search.
Coal, oil, and natural gas supply modern civilization with most of its power. However, not only are supplies of these fuels limited, but they are a major source of pollution. If the energy demands of the future are to be met without seriously harming the environment, existing alternative energy sources must be improved or further explored and developed. These include nuclear, water, solar, wind, and geothermal power, as well as energy from new, nonpolluting types of fuels. Each of these alternatives, however, has advantages and disadvantages.
Nuclear power plants efficiently produce large amounts of electricity without polluting the atmosphere; however, they are costly to build and maintain, and they pose the daunting problem of what to do with nuclear waste. Hydroelectric power is inexpensive and environmentally safe, but impractical for communities located far from moving water. Harnessing energy from tides and waves has similar drawbacks. Solar power holds great promise for the future but methods of collecting and concentrating sunlight are as yet inefficient, as are methods of harnessing wind power.
Every source of energy has its disadvantages. One way to minimize them is to use less energy. Conservation efforts coupled with renewable energy resources, such as a combination of solar, water, wind, and geothermal energy and alternative fuels, such as alcohol and hydrogen, will ensure supplies of clean, affordable energy for humanity's future.

Which of the following can be inferred from the passage?

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Kindergarten is a fun place (1)....... young children learn. In some special kindergartens, children learn outside most of the day!
Some kindergartens are (2)................ the forest. In these "forest kindergartens," children play freely. They're outside in all kinds of weather. At forest kindergartens, children learn by climbing trees and picking fruit. They also learn about and (3)...... animals. For example, they collect chicken eggs and feed baby mice.
 Little Flower Kindergarten is in Dong Nai, Vietnam. At this school, children learn about farming. They also learn that it is important (4)......healthy food. They grow vegetables in gardens - on the roof! They eat the vegetables they grow in their lunches.
At Fuji Kindergarten in Tokyo, Japan, trees grow inside the building! The classroom windows and sliding doors (5)......... open to the outside most of the year. The roof is a big, wooden circle. Children love to play and run on it.

(1).................................

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HOW TO AVOID MISCOMMUNICATION IN THE WORKPLACE
As a small-business owner, you can avoid many problems simply by improving communication in your office. By clarifying everyone's expectations and roles, you'll help to (46)............ greater trust and increase productivity among employees. Here are a few tips for doing so.
Practice active listening. The art of active listening includes (47)........ close attention to what another person is saying, then paraphrasing what you've heard and repeating it back. Concentrate (48)............ the conversation at hand and avoid unwanted interruptions (cell phone calls, others walking into your office, etc.). Take note of how your own experience and values may color your perception.
Pay attention to non-verbal cues. We don't communicate with words alone. Every conversation comes with a host of non-verbal cues -  facial  expressions,  body language,  etc.  -  that  may (49)......... contradict  what  we're saying.  Before addressing a staff member or (50).............. a project conference, think carefully about your tone of voice, how you make eye contact, and what your body is "saying." Be consistent throughout. Be clear and to the point. Don't cloud instructions or requests with irrelevant details, such as problems with past projects or issues with long-departed personnel. State what you need and what you expect. Ask, "Does anyone have any questions?" Demonstrate that you prefer questions up-front as opposed to misinterpretation later on.

(50).....................

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Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion. The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were  particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.
Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of
unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.

The best fossils are those     

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Less than a year ago marketing director, David Smith, 33 was behaving like a secet agent. He used to secretly taped all his conversations, he refused to sign his name and he would ask his secretary to check all his emails. Anything he wrote was photocopied and kept as “evidence”. But David isn’t mad, or even mildly eccertric. He suffers from ‘resposibility OCD’, one of more common form of obsessive compulsive disorder, or OCD, as it is usually known.
OCD is now recognized as the second most prevalent mental-health problem, after depression – and the number of reported cases is soaring. Experts estimate that 2% - 3% of the population suffer from the full-blown syndrome, with as many as one in five suffering from a milder form.
OCD sufferers are tortured by obsessional thoughts, such as worrying that their hands are contaminated by germs. The terrible anxiety is only relieved by performing a particular set of behaviours. Unfortunately, any sense of relief is short-lived, which is why the behaviour must be repeated again and again. OCD sufferers know their behavior is irrational, yet feel powerless to stop.
Common treatments are either antidepressants or behavioral therapy with a psychologist, but only 60% of patients show some improvement. However, a new treatment from America is bringing fresh hope to sufferers.
One of the OCD gurus and neuropsychiatrists, Jeffrey Schwartz, has designed the Four Steps program which employs meditation teachniques with the aim of teaching sufferers to manage their symptoms by themselves. “The goal is to learn to override false brain messages”, explains Schwartz.
There are different theories about what causes the disorder. Most experts recognize a genetic element that can be triggered by a stressful event. Schwartz believes that the OCD ‘worry circuit’ is a
direct result of faulty brain chemistry. ‘When someone experiences an OCD thought, one part of the brain knows quite clearly that the hand are not dirty’, explains Schwartz ‘Some part of the brain is standing apart from the symptoms, reflecting on the sheer bizarreness of it all. The objective is to harness this impartial spectator so that patients can use this healthy part of their brain to resist the compulsions.’
David Smith is delighted with the results of Schwartz’s treatment. ‘Now I can sign cheques without a problem’, he says brightly. ‘And I don’t photocopy them either. OCD used to feel like a huge stigma, but I don’t feel handicapped by it any more. You just deal with it.’

What is the word “mildly” in paragraph 1 closest in meaning to?