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

When oil or coal is burnt, a great number of smoke that contains some kinds of acid is produced

 Rewrite the sentence:
The old man is working in this factory. I borrowed his bicycle yesterday.

Read the following passage and choose the best answer (A, B, C, D):
Herb Hamrol, 103, is among a handful of survivors of the 1906 San Francisco earthquake. Today marks the 100th anniversary of San Francisco’s great earthquake and fire. As the local newspaper Contra Costa Times observes, San Francisco has been “struggling with the difference between commemoration and celebration” leading up to the centennial. The city’s mayor, Gavin Newsom, has acknowledged that the 1906 earthquake was an “awkward” event to mark. Perhaps curiously, along with various exhibitions and lectures, more than one attempt has been made to capture the spirit of the anniversary in dance. The Walnut Creek Diablo Ballet company has produced “Earthquake”, which its creators stress is not just about death and falling buildings, but also the rebuilding of the city. Earlier this month, the San Francisco Ballet held a one-off solo dance performance to the beat of seismic data broadcast live from the Hayward fault. The information triggered sounds such as thunder claps and crashing waves while principal dancer Muriel Maffre improvised. It was “well conceived and beautiful”, the San Francisco Chronicle reported, although not quite as “leading edge” as claimed. At one stage there was a “haunted-house cacophony of screams and clinking chains and running water”, the paper’s critic said. There is a small, dwindling group of survivors from the quake, many of whom were just babies when it struck. A group of five of them - the oldest is 108 - recently met in San Francisco and happily gave interviews to journalists. They will attend a special commemoration breakfast today. One survivor, Della Bacchini, 101, who was one year old in 1906, told the San Francisco Examiner that it was important for the city’s residents to keep the history of the quake alive. "San Franciscans have a lot of guts," she said. “We’ve gone through earthquakes and fires, and the people have stuck together. Certainly, the city’s regeneration after 1906 was remarkable, with three-quarters of the lost buildings replaced within three years. A reinvented San Francisco was unveiled in 1915 with its Panama-Pacific International Exposition. In a commemorative lecture, Kenneth Starr, professor of history at the University of California, compared the compulsion to rebuild in 1906 with the plans to rebuild New Orleans after last year’s disaster: “Once they’re dreamed, once they’ve been there … they never disappear.  
8. Which of the following can be inferred from the passage?

Choose the best answer:
After working hard for hours, the farmers sat down and ___________ a short rest.

The National Automobile Show in New York has been one of the top auto shows in the United States since 1900. On November 3 of that year, about 8,000 people looked over the "horseless carriages." It was the opening day and the first opportunity for the automobile industry to show off its wares to a large crowd; however, the black-tie audience treated the occasion more as a social affair than as a sales extravaganza. It was also on the first day of this show that William McKinley became the first U.S. president to ride in a car.
The automobile was not invented in the United States. That distinction belongs to Germany. Nikolaus Otto built the first practical internal-combustion engine there in 1876. Then, German engineer Karl Benz built what are regarded as the first modern automobiles in the mid-1880s. But the United States pioneered the merchandising of the automobile. The auto show proved to be an effective means of getting the public excited about automotive products.

By happenstance, the number of people at the first New York show equaled the entire car population of the United States at that time. In 1900,10 million bicycles and an unknown number of horse-drawn carriages provided the prime means of personal transportation. Only about 4,000 cars were assembled in the United States in 1900, and only a quarter of those were gasoline powered. The rest ran on steam or electricity.

After viewing the cars made by forty car makers, the show's audience favored electric cars because they were quiet. The risk of a boiler explosion turned people away from steamers, and the gasoline-powered cars produced smelly fumes. The Duryea Motor Wagon Company, which launched the American auto industry in 1895, offered a fragrant additive designed to mask the smells of the naphtha that it burned. Many of the 1900 models were cumbersome—the Gasmobile, the Franklin, and the Orient, for example, steered with a tiller like a boat instead of with a steering wheel. None of them was equipped with an automatic starter.

These early model cars were practically handmade and were not very dependable. They were basically toys of the well-to-do. In fact, Woodrow Wilson, then a professor at Princeton University and later President of the United States, predicted that automobiles would cause conflict between the wealthy and the poor. However, among the exhibitors at the 1900 show was a young engineer named Henry Ford. But before the end of the decade, he would revolutionize the automobile industry with his Model T Ford. The Model T, first produced in 1909, featured a standardized design and a streamlined method of production—the assembly line. Its lower costs made it available to the mass market.

Cars at the 1900 show ranged in price from $1,000 to $1,500, or roughly $14,000 to $21,000 in today's prices. By 1913, the Model T was selling for less than $300, and soon the price would drop even further. "I will build cars for the multitudes," Ford said, and he kept his promise

According to the passage, who developed the first modern car?

Rewrite the sentence:
“If I were you, I would go to the doctor.” David said to Claudia.

Read the following passage and choose the best answer (A, B, C, D):
Sophia is a humanoid robot developed by Hong Kong-based company Hanson Robotics. She has been designed to learn and adapt to human behavior and work with humans, and has been interviewed around the world. In October 2017, she became a Saudi Arabian citizen, the first robot to receive citizenship of a country. According to herself, Sophia was activated on April 19, 2015. She is modeled after actress Audrey Hepbum,and is known for her human-like appearance and behavior compared to previous robotic variants. According to manufacturer, David Hanson, Sophia has artificial intelligence, visual data processing and facial recognition. Sophia also imitates human gestures and facial expressions and is able to answer certain questions and to make simple conversations on predefined topics (e.g. on the weather). The robot uses voice recognition technology from Alphabet Inc. (parent company of Google) and is designed to get smarter over time. Sophia’s intelligence software is designed by SingularityNET. The AI program analyses conversations and extracts data that allows her to improve responses in the future. It is conceptually similar to the computer program ELIZA, which was one of the first attempts at simulating a human conversation. Hanson designed Sophia to be a suitable companion for the elderly at nursing homes, or to help crowds at large events or parks. He hopes that she can ultimately interact with other humans sufficiently to gain social skills. Sophia has been interviewed in the same manner as a human, striking up conversations with hosts. Some replies have been nonsensical, while others have been impressive, such as lengthy discussions with Charlie Rose on 60 Minutes. In a piece for CNBC, when the interviewer expressed concerns about robot behavior, Sophia joked that he had “been reading too much Elon Musk, and watching too many Hollywood movies”. Musk tweeted that Sophia could watch The Godfather and suggested “What’s the worst that could happen?”. On October 11, 2017, Sophia was introduced to the United Nations with a brief conversation with the United Nations Deputy Secretary-General, Amina J. Mohammed. On October 25, at the Future Investment Summit in Riyadh, she was granted Saudi Arabian citizenship, becoming the first robot ever to have a nationality. This attracted controversy as some commentators wondered if this implied that Sophia could vote or marry, or whether a deliberate system shutdown could be considered murder. Social media users used Sophia’s citizenship to criticize Saudi Arabia’s human rights record. 
4. According to the passage, all of the following statements are true EXCEPT_________

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Myriad occupational schools in the central coastal city of Da Nang have received just a small number of applications over the past few years. “Last year we only had 142 new students, but the number of new enrollees is 50 this school year,” Truong Van Hung, rector of the Duc Tri Da Nang Vocational College, said, adding the school has set a target of recruiting 1,200 students for the 2014-2015 academic year. “Closing the school is just a matter of time,” he said. Similarly, the Viet A Vocational School in Hai Chau District in Da Nang has not recruited any new enrollee for over one year given the absence of job opportunities for its graduates. “We do not want to enroll because we cannot help students land jobs after they graduate,” a leader of Viet A said. “We will only admit new students when we can have a partnership with companies who can employ our students after they finish their studies.” Elsewhere, vocational schools in the southern province of Dong Nai are ‘frozen’. The Dong Nai Information Technology-Telecommunications Vocational School in the academic year of 2013-2014 enrolled only 82 students compared with a target of 1,000; the Nhon Trach Industrial Engineering Vocational School only had 200 out of its goal of 600 students for the school year; the 26-3 Vocational School received 150 students while they set a target of 250; and the South-Eastern Electromechanical Vocational School only recruited 300 out of the 500 students they planned to admit. The situation means that equipment for training programs at those schools has been left unused and covered with rust. Local experts have commented that if the lack of students persists, vocational schools are at high risk of being closed, sooner or later. 
2. According to paragraph 1, what was the attitude of the headmaster of the Duc Tri Da Nang Vocational College?

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:
Ever since humans have inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words, and ideas. Tourists, the deaf, and the mute have had to resort to this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally, spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the party is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide, warm, and instruct people. While verbalization is most common form of language, other systems and techniques also express human thoughts and feelings.

People need to communicate in order to     .

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Isolated from the mainland, the Con Dao islands are one of Vietnam’s star (1) ______. Long preserve of political prisoners and undesirables, they now turn heads thanks to their striking natural beauty. Con Son, the (2) ______ of this chain of 15 islands and islets, is ringed with lovely beaches, coral reefs and scenic bays, and remains partially covered (3) ______ tropical forests. In addition to hiking, diving and exploring deserted coastal roads, there are excellent wildlife–watching opportunities, such as the black giant squirrel and endemic bow–fingered gecko. (4) ______ it seems an island paradise, Con Son was once hell on earth for the thousands of prisoners who languished in a dozen jails during French rule and the American– backed regime. Many Vietnamese visitors are former soldiers (5) ______ were imprisoned on the island. Until recently, few foreigners visited Con Dao, but with the commencement of low–cost boat connections this looks sure to change

Read the following passage and choose the best answer (A, B, C, D):
Like many social and political movements, the green movement has been  strengthened and annealed by the forces that oppose it. After James Watt was appointed to lead the Department of the Interior, for instance, membership in the Sierra Club grew from 183,000 to 245,000 in just 12 months.  Today, the green movement is again defined and galvanized by its command of issues like global warming and climate change, wetlands preservation, the Keystone pipeline, nuclear proliferation, hydraulic fracturing or “fracking,” fisheries depletion, species extinction and other important environmental concerns.  What distinguishes the green movement today from the earlier conservation movement is its emphasis on science and research. Speaking in spiritual tones and using religious metaphors, early environmentalists like Muir and Thoreau celebrated nature for its profound impact on man’s emotions and our souls. When Hetch Hetchy Valley in California was threatened by a dam, Muir exclaimed, “Dam Hetch Hetchy! As well dam for water-tanks the people’s cathedrals and churches, for no holier temple has ever been consecrated by the heart of man.”  Now, however, we are far more likely to call upon scientific data and empirical research to buttress arguments in favor of wilderness preservation, or against polluting industries. Politicians cite the work of polar researchers and use computerized climate models  o battle global warming, and medical researchers rely on public health statistics to argue against mercury pollution. Whether these arguments succeed or fail, however, still depends on the vision, the passion and the commitment of the people who make up the green movement
2. According to paragraph 3, what did Muir’s protest try to express?

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On April 3, 1972, a man came out of the Hilton hotel in Manhattan and started walking down the street. He stopped, (1)______ his hand with a strange object in it, put it to his ear and started to talk into it. This was the beginning of mobile phone (2)_______, more than 30 years ago. That man was Motorola’s project manager, Martin Cooper, who was (3)______ his 34th birthday that day. The strange object was the first mobile phone, which was nicknamed “the shoe” because of its unusual (4)_______. Mr. Cooper had gone to New York to introduce the new phone. The first call he made was to his rival, Joe Engel at AT&T’s research centre. Engel was responsible for the development of the radiophones for cars. “I called him and said that I was talking on a real mobile phone (5)_____ I was holding in my hand,” said Cooper. “I don’t remember what he said in reply, but I’m sure he wasn’t happy.” The quality of the call was very good, because although New York had only one base station at that time, it was being used by only one user – Martin Cooper.

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Traditional Thai cuisine falls into different categories: boiled dishes, salads, pounds foods and curries. Whether at home or in a restaurant. Thai meals are always (1)________ ‘family style’ – that is, from common serving platters, with the plates appearing in whatever order the kitchen can prepare them. When serving yourself from a common platter, put no more than one spoonful (2) _______ your plate at a time. Heaping your pate with all ‘your’ portions at once will look greedy to Thais unfamiliar with Western conventions. Another important factor in a Thai meal is (3) _______ a balance of flavours and textures. Traditionally the party orders a curry, a steamed or fried fish, a stir-fried vegetable dish and a soup, taking great care to (4) _____ cool and hot, sour and sweet, salty and plain. Thai food was originally eaten with the fingers, and it still is in certain regions. These days, though, fork-and-spoon dining is the norm. To use these tools the Thai way, use a serving spoon, or alternatively your own, to take a (5) ________ mouthful of food from a central dish and ladle it over a portion of your rice. The fork is then used to push the nowfood-soaked portion of rice back onto the spoon before entering the mouth

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

   Family life in the United States is changing. Thirty or forty years ago, the wife was called a "housewife". She cleaned, cooked, and cared for the children. The husband earned the money for the family. He was usually out working all day. He came home tired in the evening, so he did not do much housework. And he did not see the children very much, except on weekends.

   These days, however, more and more women work outside the home. They cannot stay with the children all day. They, too, come home tired in the evening. They do not want to spend the evening cooking dinner and cleaning up. They do not have time to clean the house and do the laundry. So who is going to do the housework now? Who is going to take care of the children?

   Many families solve the problem of housework by sharing it. In these families, the husband and wife agree to do different jobs around the house, or they take turns doing each job. For example, the husband always cooks dinner and the wife always does the laundry. Or the wife cooks dinner on some nights and the husband cooks dinner on other nights.

   Then there is a question of the children. In the past, many families got help with child care from grandparents. Now families usually do not live near their relatives. The grandparents often are too far away to help in a regular way. More often, parents have to pay for child care help. The help may be a babysister or a day-care center. The problem with this kind of help is the high cost. It is possible only for couples with jobs that pay well.

   Parents may get another kind of help from the companies they work for. Many companies now let people with children work part-time. That way, parents can spend more time with their children. Some husbands may even stop working for a while to stay with the children. For these men there is a new word: They are called "househusband". In the United States more ans more men are becoming househusband every year.

   These changes in the home mean changes in the family. Fathers can learn to understand their children better, and the children can get to know their fathers better. Husbands and wives may also find changes in their marriage. They, too, may have a better understanding of each other.

The word “they” in paragraph 5 refers to _______________.

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The temperature of the earth is rising at nearly twice the rate it was 50 years ago. This rapid rate and pattern of warming, scientists have concluded, cannot be explained by natural cycles alone. The only way to explain the pattern is to include the effect of greenhouse gases (GHGs) emitted by humans. To come to a conclusion on climate change, the United Nations formed a group of scientists called the Intergovernmental Panel on Climate Change, or IPCC. The IPCC meets every few years to review the latest scientific findings and write a report summarizing all that is known about global warming. Each report represents a consensus, or agreement, among hundreds of leading scientists. One of the first things the IPCC learned is that there are several greenhouse gases responsible for warming, and humans emit them in a variety of ways. Most come from the combustion of fossil fuels in cars, factories and electricity production. The gas responsible for the most warming is carbon dioxide, also called CO2. Other contributors include methane released from landfills and agriculture, especially from the digestive systems of grazing animals, nitrous oxide from fertilizers, gases used for refrigeration and industrial processes, and the loss of forests that would otherwise store CO2. Different greenhouse gases have very different heat-trapping abilities. Some of them can even trap more heat than CO2. A molecule of methane produces more than 20 times the warming of a molecule of CO2. Nitrous oxide is 300 times more powerful than CO2. Other gases, such as chlorofluorocarbons, or CFCs, which have been banned in much of the world because they also degrade the ozone layer, have heat-trapping potential thousands of times greater than CO2. But because their concentrations are much lower than CO2, none of these gases adds as much warmth to the atmosphere as CO2 does. In order to understand the effects of all the gases together, scientists tend to talk about all greenhouse gases in terms of the equivalent amount of CO2. Since 1990, yearly emissions have gone up by about 6 billion metric tons of “carbon dioxide equivalent” worldwide, more than a 20 percent increase.  
5. Which of the following is NOT mentioned in paragraph 3 as a reason for warming?

Rewrite the sentence:
The girl forgot to set the alarm clock. Therefore, she is in a hurry now.

Read the following passage and choose the best answer (A, B, C, D):
In 1903 the members of the governing board of the University of Washington in  Seattle engaged a firm of landscape architects, specialists in the design of outdoor environments - Olmsted Brothers of Brookline, Massachusetts - to advise them on an appropriate layout for the university grounds. The plan impressed the university officials, and in time many of its recommendations were implemented. City officials in Seattle, the largest city in the northwestern United States, were also impressed, for they employed the same organization to study Seattle’s public park needs. John Olmsted did the investigation and subsequent report on Seattle’s parks. He and his brothers believed that parks should be adapted to the local topography, utilize the area’s trees and shrubs, and be available to the entire community. They especially emphasized the need for natural, serene settings where hurried urban dwellers could periodically escape from the city. The essence of the Olmsted park plan was to develop a continuous driveway, twenty miles long, that would tie together a whole series of parks, playgrounds, and parkways. There would be local parks and squares too, but all of this was meant to supplement the major driveway, which was to remain the unifying factor for the entire system. In November of 1903 the city council of Seattle adopted the Olmsted Report, and it automatically became the master plan for the city’s park system. Prior to this report, Seattle’s park development was very limited and funding meager. All this changed after the report. Between 1907 and 1913, city voters approved special funding measures amounting to $4,000,000. With such unparalleled sums at their disposal, with the Olmsted guidelines to follow, and with the added incentive of wanting to have the city at its best for the AlaskaYukon-Pacific Exposition of 1909, the Parks Board bought aggressively. By 1913 Seattle had 25 parks amounting to 1,400 acres, as well as 400 acres in playgrounds, pathways, boulevards, and triangles. More lands would be added in the future, but for all practical purposes it was the great land surge of 1907-1913 that established Seattle’s park system
4. Which of the following statements about parks does NOT reflect the views of the Olmsted Brothers firm?

Read the following passage and choose the best answer (A, B, C, D):
A new report by the Pew Research Center has provided more documentation on the growing popularity of audiobooks. In a survey of 1,502 American adults conducted from January 8 to February 7 this year, Pew found that 20% of adults listened to an audiobook in the 12 months prior to the period in which the survey was conducted. In 2011, only 11% of them said they listened to an audiobook. The strongest gains have come since 2016—the dawning of the digital audiobooks age. The percentage of adults listening to audiobooks rose six percentage points between 2016 and the 2019 survey, after rising only three percentage points between 2011 and 2016. According to Pew, since 2018, college students and adults with household incomes over $75,000 are the two groups who have adopted listening to audiobooks the quickest. The Pew survey also found that while listening to audiobooks has risen steadily since the 2016 survey, reading e-books had declined. Twenty-eight percent of adults reported reading an e-book in 2016—double the number who listen to audiobooks that year. By the most recent survey, ebooks had only a 5% edge over audiobook usage. Overall, the Pew survey found a gradual reduction in the percentage of Americans who are reading. In 2011, 79% of those surveyed said they had read a book in the previous 12 months, a number that fell to 72% in early 2019. Print remained by far the book format of choice, with 65% or adults surveyed reporting that had read a print book within the last year, down from 71% in 2011. The percentage of adult who read a book in any format fell from 79% in 2011 to 72% in 2019.  
3. According to paragraph 2, what information is NOT correct about the ebook and audiobook figures?

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You’ll be able to purchase high-quality emotions online. Emotion-sharing experiences  are the latest fad in 2045. Imagine your friend at Glastonbury can post a photo on Instagram and with it comes bundled a faint twinkling of what she was feeling right there in that moment, so you too can share emotionally in her social experience.  Recently, techniques for direct brain stimulation, like opt genetics, have made it possible to not only read but also write information into single neurons. At the moment data transfer rates are still very slow, the best we can do is a few bits per second, but this could well increase to kilobits or maybe reach broadband speeds by 2045. This means the range of human perception could expand beyond its current design limitations. One could foresee a new and extraordinary world where there is a virtual marketplace for trading high quality emotions – where artists looking for a particularly high strength brew of melancholy, or actors needing to channel regret or compassion for their next play, could purchase emotions online.  Our cities will be made from living, dynamic materials that respond to the environment. In 30 years, tall buildings made of glass and twisted steel will be seen as relics from a bygone era, in the same way we think now of 1970s concrete tower blocks: ugly, outdated and unfit for contemporary purpose. The urban environment of 2045 blends architecture with living materials that are mouldable, adaptable, responsive and disposable.  Entirely new synthetic life forms, or biological machines, made of engineered living cells from bacteria, fungi and algae will grow and evolve with the changing needs of a building’s inhabitants. They breathe in pollutants, clean wastewater, and use sunlight to make useful chemicals, energy, heat and vibrant vertical gardens. We will start to see a convergence between biology and technology, to the point where there is no longer a perceptible difference between the two. Today, synthetic biology labs are looking at the full diversity of what nature has to offer and using this to mix, match and edit genomes to design synthetic life forms. Right now, this field is just getting started and the science of synthetic biology is going to be tougher than most will admit.  We will use invisibility cloaks to “disappear” ugly objects. Invisibility has forever been a tantalizing prospect. The key to cloaking lies in the way the electromagnetic spectrum  (including visible light) interacts with objects. The human eye picks up electromagnetic radiation that falls and scatters from objects and we perceive this as light. In recent decades, scientists figured out using mathematics that it might just be possible to imagine a new class of artificial materials made of intricate tiny features with light bending properties. They named them metamaterials.  Using nanotechnology engineering, scientists have since shown cloaking actually works – in principle at least, for a narrow range of colours and only from certain viewing angles. The future applications of cloaking are highly uncertain and will likely be determined by the fads and social contagion of the time. They may be used in everything from novelty gimmicks to making unsightly construction sites and power stations seemingly ‘disappear’.   
4. The word “They” in the third paragraph refers to ______

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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
6. The word “courting” in the last paragraph is closest in meaning to __________

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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