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The teacher said Columbus ............... America in 1942.

 

Read and complete the sentence. " It was _______ by oral traditional and is noted for its energy, humor, and emotional impact."

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In the United States, it is important to be on time, or punctual, for an appointment, a class, a meeting, etc... This may not be true in some other countries, however. An American professor discovered this difference while teaching a class in a Brazilian university. The two-hour class was scheduled to begin at 10 a.m, and end at 12 a.m. On the first day, when the professor arrived on time, no one was in the classroom. Many students came after 11 a.m. Although all of the students greeted the professor as they arrived, few apologised for their lateness. Were these students being rude? He decided to study the students’ behavior.
In American university, students are expected to arrive at the appointed hour. On the other hand, in Brazil, neither the teacher nor the students always arrive at the appointed hour. Classes not only begin at the scheduled time in the United States, but they also end at the scheduled time. In the Brazilian class, only a few students left the class at noon, many remained past 12:30 to discuss the class and ask more questions. While arriving late may not be important in Brazil, neither is staying late.
The explanation for these differences is complicated. People from Brazilian and North American cultures have different feelings about lateness. In Brazil, the students believe that a person who usually arrives late is probably more successful than a person who is always on time. In fact, Brazilians expect a person with status or prestige to arrive late, while in the United States, lateness is usually considered to be disrespectful and unacceptable. Consequently, if a Brazilian is late for an appointment with a North America, the American may misinterpret the reason for the lateness and become angry.
As a result for his study, the professor learned that the Brazilian students were not being disrespectful to him. Instead, they were simply behaving the appropriate way for a Brazilian student in Brazil. Eventually, the professor was able to adapt his own behavior to feel comfortable in the new culture.

All of these following sentences are true for the first day of the professor in Brazil EXCEPT     

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Digital learning is replacing traditional educational methods more and more each day. With (1) ____ rapidly classrooms are changing, it is best to forget methods you may remember from when you were in school and start thinking about newer teaching and learning techniques based on digital learning tools and technologies. The inclusion of digital learning in the classrooms can (2) ____ from simply using tablets instead of paper (3) ____ using elaborate software programs and equipment as opposed to the simple pen. This could entail using sites, services, programs, teaching tools, and technologies like study aids built for at-home (4) ____. Even social networks and communications platforms can be used to create and manage digital assignments and agendas. (5) ____ of how much technology is integrated into the classroom, digital learning has come to play a crucial role in education. It empowers students by getting them to be more interested in learning and expanding their horizons

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A question I was asked about the readiness for independence (or lack thereof) during the last stage of adolescence (ages 18 - 23) was this: “How can parents teach independence?” From what I’ve seen, there are at least four components to this training: responsibility, accountability, work, and self-help. And this instruction can start as soon as (1) ____ begins, (usually between ages 9 and 13) if not before. Young people who learn independence can often say: “I (2) ____ my freedom by acting responsibly (I did what was right even when it was hard to do),” “I was held (3) ____ for my bad choices and paid for my mistakes (I faced my consequences),” “I worked to get a lot of what I wanted (it wasn’t all handed to me),” “I developed the resourcefulness to help myself (4) ____ with difficulty (I met my problems head on).” Young people who seem to get stuck in their dependent ways often have parents who, with the most loving motivation, undermine the growth of independence. They give freedom without demanding evidence of responsibility. “If you really want to do it, that’s enough for us to say okay.” They rescue from or ignore bad choices without (5) ____ on accountability. “You didn’t know any better so we’ll overlook what you did.” They provide whatever is wanted without having the child work for any of it. “We’ll just get it for you.” They weaken with so much help when difficulties arise that the capacity for self-help is disabled. “We’ll fix what you did and take care of it.

Choose the best answer:
She will work for a travel ___________ after graduation.

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Common methods of deforestation are burning trees and clear cutting. These tactics leave the land completely barren and are controversial practices. Clear cutting is when large swaths of land are cut (1) ______ all at once. A forestry expert quoted by the Natural Resources Defense Council describes clear cutting as “an ecological trauma that has no precedent in nature (2) _____ for a major volcanic eruption.” Burning can be done quickly, in vast swaths of land, or more slowly with the slash-andburn technique. Slash-and-burn agriculture entails cutting down a patch of trees, (3) __________ them and growing crops on the land. The ash from the (4) _____ trees provides some nourishment for the (5) ______ and the land is weed-free from the burning. When the soil becomes less nourishing and weeds begin to reappear over years of use, the farmers move on to a new patch of land and begin the process again

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While family relationships can bring support, joy, and other wonderful benefits into  our lives, these relationships can also bring stress, particularly when there’s unresolved conflict. Because it’s more difficult to let go of conflicted relationships with family than it would be if these relationships were mere friendships, unresolved conflicts with family members can be particularly painful.  We have certain expectations of trust and closeness toward family members, and it can be more than merely disappointing to realize that this may not be possible with all family members. Unresolved family conflicts bring additional stress at family gatherings in particular. Past unresolved conflicts can become the elephant in the room, felt by everyone, but not directly addressed in the situation. This can be stressful for everyone before and during the family gatherings, sometimes leaving a lasting sense of stress afterward as well. Without a heartfelt discussion, an apology or another form of resolution, the trust on both sides is compromised, and may not know what to expect from this person in the future. For example, that one time your mother-in-law criticized your cooking may come up in your mind every time she comes for a visit, and others may sense your tension. This leads many people to assume the worst when they interpret each other’s behavior in the present and future interactions rather than giving the benefit of the doubt as most of us do with people we trust. Also, references or reminders of past conflicts can sting and create new pain.  Once a conflict has gone on a while, even if both parties move on and remain polite, the feelings of pain and mistrust are usually lingering under the surface, and are difficult to resolve: bringing up old hurts in an effort to resolve them can often backfire, as the other party may feel attacked; avoiding the issue altogether but holding onto resentment can poison feelings in the present.  So what do you do at a family gathering when there’s someone there with whom you’ve had an unresolved conflict? Just be polite. Contrary to how many people feel, a family gathering is not the time to rehash old conflicts, as such conversations often get messy before they get resolved — if they get resolved. Again, be polite, redirect conversations that get into areas that may cause conflict, and try to avoid the person as much as you politely can. 
8. Which of the following can be inferred from the passage?

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Carols were first sung in Europe thousands of years ago, but these were not Christmas Carols. They were pagan songs, sung at the Winter Solstice celebrations as people danced round stone circles. Carols used to be written and sung during all four seasons, but only the tradition of singing them at Christmas has really survived. Early Christians took over the pagan solstice celebrations for Christmas and gave people Christian songs to sing instead of pagan ones. However, not many people liked them as they were all written and sung in Latin, a language that the normal people couldn’t understand. This was changed by St. Francis of Assisi when, in 1223, he started his Nativity Plays in Italy. The people in the plays sang songs or ‘canticles’ that told the story during the plays. Sometimes, the choruses of these new carols were in Latin; but normally they were all in a language that the people watching the play could understand and join in! The new carols spread to France, Spain, Germany and other European countries. The earliest carol, like this, was written in 1410. Sadly only a very small fragment of it still exists. Most Carols from this time and the Elizabethan period are untrue stories, very loosely based on the Christmas story, about the holy family and were seen as entertaining rather than religious songs. They were usually sung in homes rather than in churches! Traveling singers or Minstrels started singing these carols and the words were changed for the local people wherever they were traveling. Before carol singing in public became popular, there were sometimes official carol singers called ‘Waits’. These were bands of people led by important local leaders who had the only power in the towns and villages to take money from the public. Also, at this time, many orchestras and choirs were being set up in the cities of England and people wanted Christmas songs to sing, so carols once again became popular. New carols services were created and became popular, as did the custom of singing carols in the streets. Both of these customs are still popular today! One of the most popular types of Carols services are Carols by Candlelight services. At this service, the church is only lit by candlelight and it feels very Christmassy! Carols by Candlelight services are held in
countries all over the world.
2. The word “them” in paragraph 1 is closest in meaning to _______

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Carefully guiding a needle that's longer than his tiny fingers, a young boy in Pakistan stitches together the leather pieces of a soccer ball. He sits crouched in the corner of a hot, airless shed for 12 hours. For his long day's work, he will earn 60 cents.
The boy is one of more than 200 million children who work at hard, sometimes dangerous jobs all over the world. Child labor exists in two-thirds of the world's nations. From Indonesia to Guatemala, poor children as young as six are sent off to work. Often they are mistreated and punished for not working hard enough. Children mix the gunpowder for firecrackers in China and knot the threads for carpets in India, all for pennies a day. Sometimes they are sold as slaves.
In a speech to the Child Labor Coalition when he was U.S. Secretary of Labor, Robert Reich expressed gratitude for the organization's work to end abuse of child labor, "You turned up the heat, and you got results." He also congratulated Craig Kielburger, then 13, of Canada, who traveled the world for a year fighting for kids' rights. Craig believes kids can make a difference. He offers this advice, "Write letters to companies and government officials. Put pressure on leaders to make changes and to stop the misuse of children."
One solution to the child-labor problem in poor countries is education. "The future of these countries," Secretary Reich declared, "depends on a work force that is educated. We are prepared to help build schools."
Education has helped to make the world a brighter place for one youth, Aghan of India. When he was nine, Aghan was kidnapped from his home and sold to a carpet maker. Aghan's boss was very cruel. "I was always crying for my mother," he recalls. Aghan's dream was to learn to write so that he could send letters to his parents. Fortunately, a group that opposes child labor rescued Aghan from the factory. He was sent to a shelter in New Delhi where he worked hard to learn to write.

Why do families allow young children to go to work?

Read the following passage and choose the best answer (A, B, C, D)
Gender inequality remains an everyday reality for the world’s women and girls. It can begin right at the moment of birth and continue throughout the course of a woman’s life. Despite critical advances over the course of recent history, women in all countries and across all socioeconomic levels in society can face various forms of unfair treatment, including discrimination, harassment, domestic violence and sexual abuse. Other forms of abuse that are particularly prevalent in certain countries or cultural contexts include forced marriage, honor killings, deprivation of education, denial of land and property rights, and lack of access to work and to health care. Women may experience human rights abuses at different points in their working lives, including during recruitment, hiring, promotion and termination processes, as well as in daily interactions with colleagues and supervisors. Outside of the workplace, women are often particularly vulnerable to the social and environmental impacts of business activities. For example, in many developing countries, women and girls are primarily responsible for fetching and hauling water. When company operations contaminate local sources, it is they  who carry the burden of walking, often for hours, to the nearest substitute, which can prevent them from working or going to school. According to the UN Entity for Gender Equality and the Empowerment of Women, gender “refers to the social attributes and opportunities associated with being male and female and the relationships between women and men and girls and boys, as well as the relations between women and those between men. These attributes, opportunities and relationships are socially constructed and are learned through socialization processes.” Furthermore, gender equality “refers to the equal rights, responsibilities and opportunities of women and men and girls and boys. Equality does not mean that women and men will become the same but that women’s and men’s rights, responsibilities and opportunities will not depend on whether they are born male or female.” Women and girls comprise half of the planet’s population; their empowerment is essential in expanding economic growth and promoting social development in a sustainable way. Evidence from around the world shows that gender equality advancements have a ripple effect on all areas of sustainable development, from reducing poverty, hunger and even carbon emissions to enhancing the health, well-being and education of entire families, communities and countries. In fact, “Equality between women and men is seen both as a human rights issue and as a precondition for, and indicator of, sustainable people-centered development.”  
3. Which of the following about the hardships of women in working activities is NOT stated, according to paragraph 3?

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Until the twentieth century cigarettes were not an important threat to public health. Men used tobacco mainly in the form of cigars. They chewed tobacco, piped tobacco, and snuffed. Most women did not use tobacco at all. The cigarette industry began in 1870s with the development of the cigarette manufacturing machine. This made it possible to produce great numbers of cigarettes very quickly, and it reduced the price. Today cigarette smoking is a widespread habit. About forty-three percent of the adult men and thirty-one percent of the adult women in the United States smoke cigarettes regularly. It is encouraging to note, however, that millions of people have quits smoking. Seventy-five percent of the male population and forty-six percent of the female population have smoked cigarettes for some time during their lives, but twenty-six percent of these men and eleven percent of women have stopped smoking. The number of persons who have given up smoking is increasing. Men as a group smoke more than women. Among both men and women the age group with the highest proportion of smokers is the age group 24-44. Income, education, and occupation all play a part in determining a person’s smoking habit. City people smoke more than people living on farms. Well-educated men with high incomes are less likely to smoke cigarettes than men with fewer years of schooling and lower incomes. On the other hand, if a well-educated man with a higher income smokes, he’s likely to smoke more packs of cigarettes per day. The situation is somewhat different for women. There are slightly more smokers among women with higher family incomes and higher education than among the lower income and lower educational groups. These more highly educated women tend to smoke more heavily. Among teenagers the picture is similar. There are fewer teenager smokers from upper-income, well-educated families, and also fewer from families living in farm areas. High school students who are preparing for college are less likely to smoke than those who don’t plan to continue their education after high school. Children are most likely to start smoking if one or both of their parents smoke  
1. The underlined word “it” in the second paragraph refers to ________________

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

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

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:
We have all heard the expression, “you can’t judge a book by its cover.” However, it seems that is exactly what most people do. The human brain seems to be wired in such a way that we make very strong, lasting judgments about the people we meet within the first 30 seconds. And it is true, you may be able learn a lot about a person by their first impression. But can you really learn all you need to know?
May be there is something affecting your first impression. Possibly the person is nervous or upset. Maybe you are in a bad mood or not feeling well. All of these factors and more could influence a first impression, so should people place so much weight on it?
Many people feel that a first impression is extremely important. Once those people form an idea of you, it is often difficult for them to get beyond it. If someone feels that you are something you really aren’t because of your first impression, then that is obviously not a good thing.
Yet many people really do still rely deeply on first impressions. One good example is the job interview. We dress nicely for job interviews for a very good reason: to make a good first impression. In addition to our outward appearance, many people tend to put on something of an act. By being extremely polite and showing interest, we feel that we will make a good first impression and have a better chance getting the job.
Is this the way things should be? Probably not. Will this situation ever change? The answer to that question is the same - probably not. It is just human nature to rely on a first impression. Everyone knows that they do it and most people know that it's not the right thing to do.AQ

According to the article, once people form an opinion of you, it is    .

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An American game that has traveled well is basketball, now played by more than 250 million people worldwide in an organized fashion, as well as by countless others in “pick-up” games. Basketball originated in 1891 when a future Presbyterian minister named James Naismith (1861-1939) was assigned to teach a physical education class at a Young Men’s Christian Association (YMCA) training school in Springfield, Massachusetts. The class had been noted for being disorderly, and Naismith was told to invent a new game to keep the young men occupied. Since it was winter and very cold outside, a game that could be played indoors was desirable.  Naismith thought back to his boyhood in Canada, where he and his friends had played “duck on a rock,” which involved trying to knock a large rock off a boulder by throwing smaller rocks at it. He also recalled watching rugby players toss a ball into a box in a gymnasium. He had the idea of nailing up raised boxes into which players would attempt to throw a ball. When boxes couldn’t be found, he used peach baskets. According to Alexander Wolff, in his book 100 Years of Hoops, Naismith drew up the rules for the new game in “about an hour.” Most of them still apply in some forms today.  Basketball caught on because graduates of the YMCA school traveled widely, because Naismith disseminated the rules freely, and because there was a need for a simple game that could be played indoors during winter. Naismith’s legacy included the first great college basketball coach, Forrest “Phog” Allen (1885-1974), who played for Naismith at the University of Kansas and went on to win 771 games as a coach at Kansas himself. Among Allen’s star players was Wilt Chamberlain, who became one of professional basketball’s first superstars – one night in 1962, he scored a record 100 points in a game.  The first professional basketball league was formed in 1898; players earned $2.50 for home games, $1.25 for games on the road. Not quite 100 years later, Juwan Howard, a star player for the Washington Bullets (now called the Washington Wizards), had competing offers of more than $100 million over seven seasons from the Bullets and the Miami Heat.  Many teams in the National Basketball Association now have foreign players, who return home to represent their native countries during the Olympic Games. The so-called Dream Team, made up of the top American professional basketball players, has represented
the United States in recent Olympic Games. In 1996 the Dream Team trailed some opponents until fairly late in the games. In Athens in 2004 Argentina took home the gold, the first time a Latin American country won the basketball honor. 
3. The phrase “nailing up” in paragraph 2 mostly means ______

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It’s required that you have to follow netiquettes in this chat room.

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The era of “smart cities”, controlled by an ecosystem of sensors, cameras and  algorithms, is fast approaching. In China, state media claim 500 are under construction. In Canada, Alphabet has plans for turning parts of Toronto into a timber-framed tech town as a prototype. Incremental steps are also making cities smarter. Last week, Transport for London announced plans to track Tube passengers through WiFi to monitor congestion. In the US, fast-food drive-throughs will trial number plates scanners to make ordering faster. Individually these services can improve daily life. Integrating them will create something more powerful than the sum of its parts.  Though convenience and safety are the end goals, serious questions about how city authorities will both store and share vast bodies of data must be answered. The fact that surveillance is built into key transport infrastructure will also make it increasingly difficult to avoid without disrupting daily life. The smart city risks creating a panopticon in the name of an easier and better life. The risks of anonymity disappearing will be increased by the use of different data sets, making it more likely that identifiable characteristics may appear. Closely linked to this is the question of data storage and sharing. The treasure trove of personal information will be a tempting target for hackers. This information might also be used by law enforcement, feeding into the existing dangers of mass surveillance and profiling, as is already the case in China.  These concerns have long been levelled at social media and internet-enabled home appliances. Smart city surveillance can be even more insidious. Users can avoid Facebook or hardware such as Alexa. Avoiding basic infrastructure will be near impossible without seriously affecting day-to-day life. TfL has put up signs warning customers of the WiFi tracking, yet the only choice is between tracking and having no signal. Reports on the facial recognition at airports in America suggest that avoiding being automatically scanned will be tough as well. As these systems become more closely enmeshed, avoiding snooping will become increasingly tricky.  The inevitable rise of smart cities is not inherently negative. Harnessing the power of technology and data can potentially help urban environments adapt to challenges such as climate change and overcrowding. Politicians, programmers and academics must work to ensure that does not come at the cost of all-seeing, 24-hour surveillance. 
1. Which best serves as the title for the passage?

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Set aside time each day Most of us can find 15 minutes or half an hour each day for some specific regular activity. It may be a free period or a regular wait, stay in the queue for a bus or meal - even while eating breakfast. One famous surgeon always made it a rule to spend at least 15 minutes on general reading before he went to sleep each night. Whether he went to bed at 10:00 p.m or 2:30 a.m. made no difference. Even if you cannot keep to this kind of discipline, it is a good idea to make sure you always have a general interest book in your pocket. Don’t forget it should be a book which entertains you and the English must not be too difficult for you. Checking your progress through pacing Nearly all speed reading courses have a "pacing element - some timing device which lets the student know how many words a minute he is reading. You can do this simply by looking at your watch every 5 or 10 minutes and noting down the page number you have reached. How do you know when 5 minutes have passed on your watch if you are busy reading the book? Well, this is difficult at first. A friend can help by timing you over a set period. Pace yourself every three or four days, always with the same kind of easy, general interest book. You should soon notice your habitual w. p. m rate creeping up. Check comprehension Obviously there is little point in increasing your w. p. m rate if you do not understand what you are reading. When you are consciously trying to increase your reading speed, stop after every chapter (if you are reading a novel) or every section or group of ten or twelve pages (if it is a textbook) and ask yourself a few questions about what you have been reading. If you find you have lost the thread of the story, or you cannot remember clearly the details of what was said, re-read the section or chapter. “Lightening speed” exercise Take 4 or 5 pages in the general interest book you happen to be reading at the time. Read them as fast as you possibly can. Do not bother about whether you understand or not. Now go back and read them at what you feel to be your normal w. p. m rate, the rate at which you can comfortably understand. After a “lightening speed” read through (probably around 6 w. p. m) you will usually find that your normal speed has increased -  perhaps by as much as 50 -100 w. p. m.
2. One famous surgeon always made it a rule to read ____

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The International Monetary Fund (IMF) is an organization of 189 member countries.  It stabilizes the global economy in three ways. First, it monitors global conditions and identifies risks. Second, it advises its members on how to improve their economies. Third, it provides technical assistance and short-term loans to prevent financial crises. The IMF’s goal is to prevent these disasters by guiding its members. These countries are willing to give up some of their sovereign authority to achieve that aim.  The IMF has the rare ability to look into and review the economies of all its member countries. As a result, it has its finger on the pulse of the global economy better than any other organization. The IMF produces a wealth of analytical reports. It provides the World Economic Outlook, the Global Financial Stability Report, and the Fiscal Monitor each year. It also delves into regional and country-specific assessments. It uses this information to determine which countries need to improve their policies. Hence, the IMF can identify which countries threaten global stability. The member countries have agreed to listen to the IMF’s recommendations because they want to improve their economies and remove these threats.  Since the Mexican peso crisis of 1994–95 and the Asian crisis of 1997–98, the IMF has taken a more active role to help countries prevent financial crises. It develops standards that its members should follow. For example, members agree to provide adequate foreign exchange reserves in good times. That helps them increase spending to boost their economies during recessions. The IMF reports on members countries’ observance of these standards. It also issues member country reports that investors use to make well-informed decisions. That improves the functioning of financial markets. The IMF also encourages sustained growth and high living standards, which is the best way to reduce members’ vulnerability to crises.  The IMF provides loans to help its members tackle balance of payments problems, stabilize their economies, and restore sustainable growth. Because the Fund lends money, it’s often confused with the World Bank. The World Bank lends money to developing countries for specific projects that will fight poverty. Unlike the World Bank and other development agencies, the IMF does not finance projects. Traditionally, most IMF borrowers were developing countries. They had limited access to international capital markets due to their economic difficulties. An IMF loan signals that a country’s economic policies are on the right track. That reassures investors and acts as a catalyst for attracting funds from other sources. All that shifted in 2010 when the Eurozone crisis prompted the IMF to provide short-term loans to bail out Greece. That was within the IMF’s charter because it prevented a global economic crisis.  The role of the IMF has increased since the onset of the 2008 global financial crisis. In fact, an IMF surveillance report warned about the economic crisis but was ignored. As a result, the IMF has been called upon more and more to provide global economic surveillance. It’s in the best position to do so because it requires members to subject their economic policies to IMF scrutiny. Member countries are also committed to pursuing policies that are conducive to reasonable price stability, and they agree to avoid manipulating exchange rates for unfair competitive advantage.
1. What does the passage mainly discuss?

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In the future, maybe all cars that run on petrol will be replaced by solar cars, which  have been around for a while, but with recent (1)__________ in solar car design and the measurement of photovoltaic cells becoming smaller, the dream of a truly efficient solar car is more reality than fantasy.  A solar car is a vehicle (2)__________ by photovoltaic cells, also called solar cells, which convert sunlight (light energy) into electrical energy.  As a source of energy on earth, there is nothing like the sun: in a mere one thousandth of one second (.001), the sun emits enough energy to fulfill our planet’s (3)_______ needs for the next 5,000 years. It is a staggering fact, and an exciting one. Since the energy from the sun is responsible for renewable resources such as wind, tides, and heat, solar energy seems to offer the brightest future for not only cars, but for the entire energy crisis. Despite the appearance that solar energy may be the least feasible among the current crop of (4)_________ fuel propositions, new solar powered devices and more specifically solar powered cars are beginning to be developed. How do solar cars work?  The photo-voltaic cells absorb photons from sunlight. This action generates heat, which the cells then convert into electrical energy and stores in an on-board battery. This process of conversion is called the photovoltaic effect. Not surprisingly, such a vehicle has zero emissions, and is very (5)________ friendly. Unfortunately, at the moment photovoltaic cells are extremely inefficient, yet as time progresses the efficiency of these cells will grow. This will make solar energy and solar cars the fuel and car of the future-a closer reality

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:
The difference between the nuclear family and the extended family is that a nuclear family refers to a single basic family unit of parents and their children, whereas the extended family refers to their relatives such as grandparents, in-laws, aunts and uncles, etc. In many cultures, and particularly indigenous societies, the latter is the most common basic form of social organization. A nuclear family is limited, according to Kristy Jackson of Colorado State University, to one or two parents (e.g. a father and mother) and their own child, or children, living together in a single house or other dwellings. In anthropology, they only must be related in this fashion; there is no upper or lower limit on the number of children in a nuclear family.
The extended family is a much more nebulous term, but in essence refers to kin or relations not covered by the above definition. In historical Europe and Asia as well as in Middle Eastern, African, and South American Aboriginal cultures, extended family groups were typically the most basic unit of social organization. The term can differ in specific cultural settings, but generally includes people related in age or by lineage. Anthropologically, the term “extended family” refers to such a group living together in a household, often with three generations living together (grandparents, parents, and children) and headed in patriarchal societies by the eldest man or by some other chosen leadership figure. However, in common parlance, the term “extended family” is often used by people simply to refer to their cousins, aunts, uncles, and so on, even though they are not living together in a single group.
Historically, most people in the world have lived in extended family groupings rather than in nuclear families. This was even true in Europe and in the early United States, where multiple generations often lived together for economic reasons. During the 20th century, average income rose high enough that living apart as nuclear families became a viable option for the vast majority of the American population. In contrast, many indigenous societies and residents of developing countries continue to have multiple generations living in the same household. The rise of the nuclear family in the modern West does not necessarily mean that family arrangements have stabilized, either. The rapid growth in single-parent households, for instance, also represents a substantial change in the traditional nuclear family. More couples are also choosing not to have children at all.

According to the passage, single-parent households     .