Each sentence has a mistake. Find it bychosing A B C or D

His enthusiastic  for music has stayed strong throughout his 23 years in radio

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His bad mark in the exam was the consequence of his laziness.

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Like the revolutions that preceded it, the Fourth Industrial Revolution has the potential to raise global income levels and improve the quality of life for populations around the world. To date, those who have gained the most from it have been consumers able to afford and access the digital world; technology has made possible new products and services that increase the efficiency and pleasure of our personal lives. Ordering a cab, booking a flight, buying a product, making a payment, listening to music, watching a film or playing a game — any of these can now be done remotely. In the future, technological innovation will also lead to a supply-side miracle, with long-term gains in efficiency and productivity. Transportation and communication costs will drop, logistics and global supply chains will become more effective and the cost of trade will diminish, all of which will open new markets and drive economic growth. At the same time, as the economists Erik Brynjolfsson and Andrew McAfee have pointed out, the revolution could yield greater inequality, particularly in its potential to disrupt labor markets. As automation substitutes for labor across the entire economy, the net displacement of workers by machines might exacerbate the gap between returns to capital  and returns to labor. On the other hand, it is also possible that the displacement of workers by technology will, in aggregate, result in a net increase in safe and rewarding jobs. We cannot foresee at this point which scenario is likely to emerge, and history suggests that the outcome is likely to be some combination of the two. However, I am convinced of one thing — that in the future, talent, more than capital, will represent the critical factor of production. This will give rise to a job market increasingly segregated into “low-skill/low-pay” and “highskill/high-pay” segments, which in turn will lead to an increase in social tensions. In addition to being a key economic concern, inequality represents the greatest societal concern associated with the Fourth Industrial Revolution. The largest beneficiaries of innovation tend to be the providers of intellectual and physical capital — the innovators, shareholders and investors — which explains the rising gap in wealth between those dependent on capital versus labor. Technology is therefore one of the main reasons why incomes have stagnated, or even decreased, for a majority of the population in high-income countries: the demand for highly skilled workers has increased while the demand for workers with less education and lower skills has decreased. The result is a job market with a strong demand at the high and low ends, but a hollowing out of the middle. This helps explain why so many workers are disillusioned and fearful that their own real incomes and those of their children will continue to stagnate. It also helps explain why middle classes around the world are increasingly experiencing a pervasive sense of dissatisfaction and unfairness. A winnertakes-all economy that offers only limited access to the middle class is a recipe for democratic malaise and dereliction.  
5. What does the word “this” in the third paragraph refer to?

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Automated manufacture arose out of the intimate relationship of such economic forces and technical innovations as the division of labor, power transfer and the mechanization of the factory, and the development of transfer machines and feedback systems as explained below. The division of labor (that is, the reduction of a manufacturing or service process into its smallest independent steps) developed in the latter half of the 18th century and was first discussed by the Scottish economist Adam Smith in his book An Inquiry into the Nature and Causes of the Wealth of Nations (1776). In manufacturing, the division of labor results in increased production and a reduction in the level of skills required of workers. Mechanization was the next step necessary in the development of automation. The simplification of work made possible by the division of labor also made it possible to design and build machines that duplicated the motions of the worker. As the technology of power transfer evolved, these specialized machines were motorized and their production efficiency was improved. The development of power technology also gave rise to the factory system of production, because all workers and machines had to be located near the power source. The transfer machine is a device used to move a workpiece from one specialized machine tool to another, in such a manner as to properly position the workpiece for the next machining operation. Industrial robots, originally designed only to perform simple tasks in environments dangerous to human workers, are now extremely dexterous and are being used to transfer, handle, and index (that is, to position) both light and heavy workpieces, thus performing all the functions of a transfer machine. In actual practice, a number of separate machines are integrated into what may be thought of as one large machine. In the 1920s the auto industry combined these concepts into an integrated system of production. The goal of this assembly-line system was to make automobiles available to people who previously could not afford them. This method of production was adopted by most automobile manufacturers and rapidly became known as Detroit automation. Despite more recent advances, it is this system of production that most people think of as automation.
2. Which of the following is TRUE according to the passage?

In the mid - nineteenth century, the United States had tremendous natural resources that could be exploited in order to develop heavy industry. Most of the raw materials that are valuable in the manufacture of machinery, transportation facilities, and consumer goods lay ready to be worked into wealth. Iron, coal, and oil - the basic ingredients of industrial growth - were plentiful and needed only the application of technical expertise, organizational skill, and labor.

One crucial development in this movement toward industrialization was the growth of the railroads. The railway network expanded rapidly until the railroad map of the United States looked like a spider's web, with the steel filaments connecting all important sources of raw materials, their places of manufacture, and their centers of distribution. The railroads contributed to the industrial growth not only by connecting these major centers, but also by themselves consuming enormous amounts of fuel, iron, and coal.

Many factors influenced emerging modes of production. For example, machine tools, the tools used to make goods, were steadily improved in the latter part of the nineteenth century - always with an eye to speedier production and lower unit costs. The products of the factories were rapidly absorbed by the growing cities that sheltered the workers and the distributors. The increased urban population was nourished by the increased farm production that, in turn, was made more productive by the use of the new farm machinery. American agricultural production kept up with the urban demand and still had surpluses for sale to the industrial centers of Europe.

The labor that ran the factories and built the railways was recruited in part from American farm areas where people were being displaced by farm machinery, in part from Asia, and in part from Europe. Europe now began to send tides of immigrants from eastern and southern Europe - most of whom were originally poor farmers but who settled in American industrial cities. The money to finance this tremendous expansion of the American economy still came from European financiers for the most part, but the American were approaching the day when their expansion could be financed in their own " money market".

Which of the following in NOT true of United States farmers in the nineteenth century?

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:
Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Pfiesteria in 3,000-year-old sea floor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria.
Lately, however, blooms – or huge, dense populations – of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina’s Neuse River, nearly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fisherman and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment.
For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and waste water from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.

What were bulldozers used for in the Neuse River?

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Body postures and movements are frequently indicators of self-confidence, energy, fatigue, or status. Cognitively, gestures operate to clarify, contradict, or replace verbal messages. Gestures also serve an important function with regard to regulating the flow of conversation. For example, if a student is talking about something in front of the class, single nods of the head from the teacher will likely cause that student to continue and perhaps more elaborate. Postures as well as gestures are used to indicate attitudes, status, affective moods, approval, deception, warmth, arid other variables related to conversation interaction.
The saying “A picture is worth a thousand words” well describes the meaning of facial expressions. Facial appearance – including wrinkles, muscle tone, skin coloration, and eye color- offers enduring cues that reveal information about age, sex, race, ethnic origin, and status.
A less permanent second set of facial cues-including length of hair, hairstyle, cleanliness, and facial hair-relate to an individual’s idea of beauty. A third group of facial markers are momentary expressions that signal that cause changes in the forehead, eyebrows, eyelids, cheeks, nose, lips, and chin, such as raising the eyebrows, wrinkling the brow, curling the lip.
Some facial expressions are readily visible, while others are fleeting. Both types can positively or negatively reinforce the spoken words and convey cues concerning emotions and attitudes.

How many categories of facial expressions are mentioned?

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Children can learn a lot from doing household chores. Doing chores helps children learn about (1)___________ they need to do to care for themselves, a home and a family. They learn skills they can use in their adult lives, like preparing meals, cleaning, organizing and keeping a garden. (2)________in chores also gives children experience of relationship skills like communicating clearly, negotiating, cooperating and working as a team. When children (3)_________ to family life, it helps them feel competent and responsible. Even if they don’t enjoy the chore, when they keep going they get the feeling of satisfaction that comes with finishing a task. And sharing housework can also help families work better and reduce family stress. When children help out, chores get done sooner, and parents have less to do. This frees up time for the family to spend doing fun things together. The secret for involving children in household chores is asking for contributions that you (4)__________ and that suit your children’s ages and abilities. A chore that’s too hard for a child can be frustrating – or even dangerous – and one that’s too easy might be boring. Even a young child can start to help out if you choose activities that are right for his age. You can start with simple jobs like looking after his own toys. Chores like this send the message to your child that his contribution is important. If your child is old enough, you can have a family discussion (5)___________ chores. This can reinforce the idea that the whole family contributes to how the household runs

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The majority of Americans can live comfortable lives on the salaries they earn, without the support of a universal public-welfare system. These so-called middle-class Americans generally own their own homes and cars, spend some time each year on vacation, and can pay – at least in part - for a college education for their children. Most Americans set (1) _______ money in savings accounts to help pay major expenses; many invest in the stock market in hopes of earning a healthy return on their investments.  Most buy insurance, especially life and medical insurance, frequently with contributions (2) _____ the companies for which they work. Many companies also have retirement plans which they and their employees put aside money for their retirement pensions. When added to Social Security payments, pensions (3) _______ many tired Americans to live comfortably. On the other hand, for older Americans who require longterm care outside of a hospital, a nursing home can be very expensive. In 1993, a family of four with a yearly income of $14,763 or less was considered poor by American standards; 15.1 percent of American families fell into this category. In addition to the benefits discussed above, many families below the (4) ________line receive welfare payments, sums of money provided by the government each month to those whose income is too low to obtain such necessities as food, clothing and shelter. The most common form of welfare payment has been through a program called Aid to Families With Dependent Children (AFDC). Originally (5) _______to help children whose fathers had died, AFDC evolved into the main source of regular income for millions of poor American families

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

In the early years of television, educational  specialists believed that it will be very useful in teaching and learning

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Most researchers agree that artificial intelligence (AI) peaked around 1985. A public (1)  _______ science-fiction movies and excited by the growing power of computers had high expectations. For years, Al researchers had implied that a breakthrough was just (2) ____ the corner. Marvin Minsky said in 1967 that within a generation the problem of creating AI would be (3) ____ solved. Prototypes of medical-diagnosis programs and speech recognition software appeared to be making progress. It proved to be a false dawn. Thinking computers and household robots failed to (4) ______, and a backlash ensued. "There was undue optimism in the early 1980s’, says David Leaky, a researcher at Indiana University. “Then when people realised these were hard problems, there was retrenchment’. By the late 1980s, the term AI was being avoided by many researchers, who opted instead (5) ____ themselves with specific subdisciplines such as neural networks, agent technology, case-based reasoning

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Before the mid-nineteenth century, people in the United States ate most foods only in season. Drying, smoking, and salting could preserve meat for a short time, but the availability of fresh meat, like that of fresh milk, was very limited; there was no way to prevent spoilage. But in 1810 a French inventor named Nicolas Appert developed the cooking-and-sealing process of canning. And in the 1850’s an American named Gail Borden developed a means of condensing and preserving milk. Canned goods and condensed milk became more common during the 1860’s, but supplies remained low because cans had to be made by hand. By 1880, however, inventors had fashioned stamping and soldering machines that mass- produced cans from tinplate. Suddenly all kinds of food could be preserved and bought at all times of the year. Other trends and inventions had also helped make it possible for Americans to vary their daily diets. Growing urban populations created demand that encouraged fruit and vegetable farmers to raise more produce. Railroad refrigerator cars enabled growers and meat packers to ship perishables great distances and to preserve them for longer periods. Thus, by the 1890’s, northern city dwellers could enjoy southern and western strawberries, grapes, and tomatoes, previously available for a month at most, for up to six months of the year. In addition, increased use of iceboxes enabled families to store perishables. An easy means of producing ice commercially had been invented in the 1870’s, and by 1900 the nation had more than two thousand commercial ice plants, most of which made home deliveries. The icebox became a fixture in most homes and remained so until the mechanized refrigerator replaced it in the 1920’s and 1930’s. Almost everyone now had a more diversified diet. Some people continued to eat mainly foods that were heavy in starches or carbohydrates, and not everyone could afford meat. Nevertheless, many families could take advantage of previously unavailable fruits, vegetables, and dairy products to achieve more varied fare.
8. The author implies that in the 1920’s and 1930’s home deliveries of ice: 

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Graphic novels, as the name suggests, are books written and illustrated in the style of a comic book. Adults may feel that graphic novels do not help children become good readers. They believe that this  type of  reading material  somehow prevents  "real"   reading. (1)_____ , many quality graphic novels are now being seen as a method of storytelling on the same level as novels, films or audiobooks. Many librarians and teachers are now accepting graphic novels as proper literature for children as they (2)____ young people and motivate them to read. This has been especially true with children who are not (3)_________to read, especially boys.Language learners are also motivated by graphic novels because the pictures provide clues to the meaning of the words. Therefore, they will (4)______ new vocabulary more quickly. Many teachers have reported great success when they used graphic novels with their students, especially in the areas of English, social studies and art. The idea that graphic novels are too simple to be regarded as serious reading is no longer valid. Reading them can, undoubtedly, help students develop the skills (5) _____ are necessary to read more challenging works

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:
Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a  peaceful scene that electric light just cannot match.
Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.
In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle- making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.
Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.
For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle- making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects – some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.
Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.
Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

According to the text, what is needed to succeed at candle-making?

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I started snowboarding in my late 20s and, knowing the dangers involved, my main aim has always been to get myself safely down the mountain in one piece. However, last year, I began to feel that my lack of courage was preventing me from improving. So I booked myself on the Snowcamp course in the town of Bourg-Saint-Maurice in the French Alps. There were 14 of us on the course and we stayed in a cheap guesthouse just outside the town. It was a basic-looking building made of local wood. There were strict rules about recycling our rubbish and all the electricity came from a nearby windmill. The facilities, however, went well beyond what I had expected for the price. There was a log fire, a heated boot room, fine balcony views and a menu that any chef would be proud of. Snowcamp was a good mix of holiday and group learning. Locations for lessons were chosen daily according to the snow conditions. Then we were put into three groups, depending on what skills people wanted to work on. Most of the time, I stayed on the main slopes. The teachers encouraged me to increase my speed and I even did some jumps. After a few days, a teacher called Johno persuaded me to take on a bigger challenge and try the deeper snow. The first 20 seconds of the lesson were fantastic, but then it got difficult. I kept sinking and then having to dig myself out. After 40 minutes, I felt like crying with tiredness and anger but I continued pushing myself and, when I got back on to the main slopes, I suddenly found everything far easier than before. It had been worth all the pain!  
2. How did Pascal feel about the guesthouse he stayed in?

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Light pollution is excessive, misdirected, or obtrusive artificial (usually outdoor) light. Too much light pollution has (1) __________effects on people. I washes out starlight in the night sky, disrupts ecosystems, has adverse health effects, and wastes energy. With respect to adverse health effects, many species, (2) ___________humans, are dependent on natural body cycles, and the production of melatonin, which are regulated by light and dark (e.g., day and night). If humans are exposed to light (3) ________sleeping, melatonin production can be affected. This can lead to sleep disorders and other health problems such as increased headaches, worker fatigue, medically defined stress, some forms of obesity due to lack of sleep and increased anxiety. And ties are being (4) ________ to a couple of types of cancer. There are also effects of glare on aging eyes. Heath effects are not only due to overillumination or excessive (5) ________of light over time, but also improper spectral composition of light

Rewrite the sentence:
He said that he would take responsibility for his company's damage to the area. But then he denied that.

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A number of scientists are emphasizing the tremendous challenger that will soon be posed when the depletion of fossil fuel supplies coincides with an alarming increase in the global population. They highlight agriculture, which is heavily dependent not only on gasoline to fuel machinery but also on the petrochemicals without which today’s synthetic fertilizers and pesticides could not be manufactured. But for the latter two, crop yields would be only a fraction of what they are. To assume that an abundant source of renewable energy will be a panacea is to ignore these vital non-fuel uses of petrochemicals. Then there is the challenge posed to the current levels of mobility. As a fuel, gasoline has an unrivalled portability compared to electricity, which requires bulky batteries, and hydrogen, which is notoriously difficult to store. Biofuels might seem like an alternative but the energy (currently in the form of fossil fuels) consumed when converting corn into bioethanol, for instance, greatly exceeds the output when the fuels is utilized. In any case, once the crisis in the food supply looms large it will not make sense to divert food crops to other uses. There seems to be a widespread belief that the era of oil dependency is coming to an end. There is a widespread complacency resting on the assumption that the experts will come up with a technological remedy making for a completely pain-free transition. Scientists such as Walter Youngquist argue that tis assumption may be mistaken and that the remaining resources might only support half of the current global population. In his opinion, the absence of a realistic alternative to fossil fuels will mean, amongst other things, that the first priority will be to curb the demand for food  
2. The aim of the passage is to _______________

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Rains that are almost biblical, heat waves that don’t end - there’s been a change in the weather lately. What’s going on? Extreme weather is an unusual weather event such as rainfall, a drought or a heat wave in the wrong place or at the wrong time. In theory, they are very rare. But these days, our TV screens are constantly showing such extreme weather events. Take just three news stories from 2010: 28 centimetres of rain fell on Rio de Janeiro in 24 hours, Nashville, USA, had 33 centimetres of rain in two days and there was record rainfall in Pakistan. The effects of this kind of rainfall are dramatic and lethal. In Rio de Janeiro, landslides followed, burying hundreds of people. In Pakistan, the floods affected 20 million people. Meanwhile, other parts of the world suffer devastating droughts. Australia, Russia and East Africa have been hit in the last ten years. And then there are unexpected heat waves, such as in 2003 in Europe. That summer, 35,000 deaths were said to be heat-related. Peter Miller, a National Geographic columnist, says what is happening to our weather is probably a mixture of numerous factors. On the one hand, the most important influences on weather events are natural cycles in the climate. Two of the most famous weather cycles, EI Nino and La Nina, originate in the Pacific Ocean. The heat from the warm ocean rises high into the atmosphere and affects weather all around the world. On the other hand, the temperature of the Earth’s oceans is slowly but steadily going up. And this is a result of human activity. We are producing greenhouse gases that trap heat in the Earth’s atmosphere. This heat warms up the atmosphere, land and oceans. Warmer oceans produce more water vapour - think of heating a pan of water in your kitchen. Turn up the heat, it produces steam more quickly. Satellite data tells us that the water vapour in the atmosphere has gone up by four percent in 25 years. This warm, wet air turns into the rain, storms, hurricanes and typhoons that we are increasingly experiencing. Climate scientist, Michael Oppenheimer, says that we need to face the reality of climate change. And we also need to act now to save lives and money in the future
5. The underlined word “this” in the passage refers to ______.

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Most of the roughly 1,400 active volcanoes around the world, including many in the  United States, do not have on-site observatories. Lacking ground-level data, scientists are turning to satellites to keep tabs on volcanoes from space. Now using artificial intelligence, scientists have created a new satellite-based method of detecting warning signs of when a volcano is likely to erupt.  Every time one of the satellites passes over a given volcano, it can capture an InSAR image of the volcano from which ground movement away from or toward the satellite can be calculated.  InSAR can often pick up the ominous expansion of the ground that occurs when magma moves within a volcano’s plumbing, but it is difficult to continuously monitor the huge number of images produced by the latest generation of SAR-equipped satellites. In addition, some volcanoes exhibit long-lasting deformation that poses no immediate threat, and new images must be compared with older ones to determine whether a deformation at a volcano is a warning sign or just business as usual. To solve these issues, the researchers turned to machine learning, a form of artificial intelligence that can glean subtle patterns in vast quantities of data. They developed an algorithm that can rapidly analyze InSAR data, compare current deformation to past activity, and automatically create an alert when a volcano’s unrest may be cause for concern.  To test the algorithm’s viability, the team applied it to real data from the period leading up to the 2018 eruption of Sierra Negra, a volcano in the Galápagos Islands. The algorithm worked, flagging an increase in the ground’s inflation that began about a year before the eruption. Had the method been available at the time, the team writes, it would have accurately alerted researchers that Sierra Negra was likely to erupt.
5. According to paragraph 4, what is correct about the Sierra Negra disaster?

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Generation gap refers to a vast difference in cultural norms between a younger generation and their elders. It’s a distressing thing for the phenomenon (1) ____ occurs around the world. The (2) ____ of communication, different views on certain problems and different attitudes towards life may cause the generation gap or even widen it. First, one of the major factors for this misunderstanding between two generations is that parents and children lack communication. Young people (3) ____ reveal their feelings to their parents, and often complain that their parents are out of (4) ____ with modern days, that they are dominant, that they do not trust their children to deal with crises, and that they talk too much about certain problems. So when young people meet some problems, they would rather (5) ____ to their classmates or their friends for help. The lack of communication widens the generation gap Another factor is that parents and their children see almost everything from different (6) ____. Take choosing career as an example. Parents generally believe it is their responsibility to plan the career for their children. Some hope their children will (7) ____ professions that will bring them greatest prestige and economic benefits. Some hope children will have a stable job with a regular income. But the youth may think they should be free to (8) ____ their own decisions as to their future career. Young people explain that true success is not a matter of money or position, instead, it is a matter of self-fulfillment. Finally, with the change of the world over decades, the attitude of the young has altered too. There are differences in (9) ____ matters as musical tastes, fashions, drug use, sex and politics between the young people and their elders. Nowadays long hair on young males is viewed as fashion by the young, but it is frequently considered a shocking act of rebellion against (10) ____ norms by parents