Choose the best answer:
A hydroelectric dam ______________ in this area now.

 

Read the following passage and choose the best answer (A, B, C, D):
Although experts agree that traditional meetings are essential for making certain decisions and developing strategy, many employees view them as one of the most unnecessary parts of the workday. The result is not only hundreds of billions of wasted dollars, but the worsening of what psychologists call “meeting recovery syndrome”: time spent cooling off and regaining focus after a useless meeting.  It’s isn’t anything novel that workers feel fatigued after a meeting, but only in recent decades have scientists deemed the condition worthy of further investigation. Meeting recovery syndrome (MRS) is most easily understood as a slow replenishment of our limited mental resources. When an employee sits through an ineffective meeting their brain power is essentially being drained away, says Joseph A. Allen, a professor at the University of Utah. If they last too long, fail to engage employees or turn into lectures with little to no personal interactions, meetings will significantly diminish employees’ psychological stamina. Taking time to recover a must, but doing so comes at the expense of productivity.  As humans, when we transition from one task to another – such as from sitting in a meeting to doing normal work – it takes an effortful cognitive switch. We must make a big mental effort to stop the previous task and then expend significant mental energy to move on to the other. Some can bounce back from horrible meetings rather quickly, while others carry their fatigue until the end of the workday. It’s even worse when a worker has several meetings that are separated by only 30 minutes.  While no counter-MRS measures have been tested, Allen says one trick that might work is for employees to identify things or locations that quickly change their mood from negative to positive. As simple as it sounds, finding a personal happy place, going there and then coming straight back to work might be the key to reducing recovery time. Another solution is to ask ourselves if our meetings are even necessary in the first place. If all that’s on the agenda is a quickly catch-up, or some non-urgent information sharing, it may better for managers to send an e-mail to his or her subordinates instead. Most important, however, if for organizations to awaken to the concept of meetings being flexible, says Allen. We have to get rid of the acceptance of meetings as sites of pain, when they should be places of gain.” Allen says. 
5. The word “bounce back” in paragraph 4 can be best replaced by ___________

Read the following passage and choose the best answer (A, B, C, D):
A Tidal Stream Generation system reduces some of the environmental effects of tidal barrages by using turbine generators beneath the surface of the water. Major tidal flows and ocean currents, like the Gulf Stream, can be exploited to extract its tidal energy using underwater rotors and turbines. Tidal stream generation is very similar in principle to wind power generation. Water currents flow across a turbines rotor blades which rotates the turbine, much like how wind currents turn the blades for wind power turbines. In fact, tidal stream generation areas on the sea bed can look just like underwater wind farms. Unlike off-shore wind power which can suffer from storms or heavy sea damage, tidal stream turbines operate just below the sea surface or are fixed to the sea bed. Tidal streams are formed by the horizontal fast flowing volumes of water caused by the ebb and flow of the tide as the profile of the sea bed causes the water to speed up as it approaches the shoreline. As water is much more denser than air and has a much slower flow rate, tidal stream turbines have much smaller diameters and higher tip speed rates compared to an equivalent wind turbine. Tidal stream turbines generate tidal power on both the ebb and flow of the tide. One of the disadvantages of Tidal Stream Generation is that as the turbines are submerged under the surface of the water they can create hazards to navigation and shipping. Other forms of tidal energy include tidal fences which use individual vertical-axis turbines that are mounted within a fence structure, known as the caisson, which completely blocks a channel and force water through them. Another alternative way of harnessing tidal power is by using an “oscillating tidal turbine”. This is basically a fixed wing called a Hydroplane positioned on the sea bed. The hydroplane uses the energy of the tidal stream flowing past it to oscillate its giant wing, similar to a whales flipper, up and down with the movement of the tidal currents. This motion is then used to generate electricity. The angle of the hydroplane to the flow of the tide can be varied to increase efficiency. Tidal energy is another form of low-head hydro power that is completely carbon neutral like wind and hydro energy. Tidal power has many advantages compared to other forms of renewable energy with its main advantage being that it is predictable. However, like many other forms of renewable energy, tidal energy also has its disadvantages such as its inflexible generation times dependant upon the tides and the fact that it operates in the hostile conditions of the oceans and seas
7. The word “renewable” in the last paragraph mostly means ______

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks
CARE was (1)......... in 1945 to help people after World War II. It distributed over 100 million food (2)........... . Meanwhile, it was starting self-help programs. Today it has development programs in 37 countries. CARE gives equipment and (3)........people how to build water systems, roads, schools and   health centers. It also teaches people how to increase production on farms, how to reforest areas, and how to (4).......... small village industries. Doctors and nurses volunteer to go to villages. They provide health  care for the people. They also teach people how to improve their health. They train people to provide (5).................medical care. CARE also provides food for about 30 million people every year. Most of them are children. It gives special help where there is a flood, an earthquake, a drought or a war.

(3)...............................

Choose the best answer:
Annie love doing sports. She’s ___________.

Read the following passage and choose the best answer (A, B, C, D):
In addition to improved physical health, sport plays a primarily positive role in youth  development, including improved academic achievement, higher self-esteem, fewer behavioral problems, and better psychosocial development. Many studies focus on the effects of sport on the five “C’s” - competence, confidence, connections, character, and caring. The many facets of playing sport - the discipline of training, learning teamwork, following the leadership of coaches and captains, learning to lose - provide lifelong skills for athletes.  The literature on youth sport stresses the positive effects of participation in learning the important life skills of goal setting and time management combined with enjoyment; the development of a strong sense of morality; and the development of an appreciation of diversity. Studies have shown that children and youth participating in sport, when compared to peers who do not play sport, exhibit higher grades, expectations, and attainment; greater personal confidence and self-esteem; greater connections with school – that is, greater attachment and support from adults; stronger peer relationships, more academically oriented friends, greater family attachment and more frequent interactions with parents; more restraint in avoiding risky behavior; and greater involvement in volunteer work.  Sport provides opportunities for children and youth to engage in valuable and positive relationships with adults. Thus, it is a missed opportunity for children who are "gated" - or not included in sport - during early stages of childhood because they are less well behaved than other children. These children are being prevented from participating in the very thing that could help them learn to control and regulate their behavior. Sport provides an opportunity for children to safely navigate and negotiate between right and wrong as they learn to interact with peers and adults. Research by Taliaferro et al. suggests that playing sport can even protect against suicide risk in youth. Compared to non-athletes, male athletes exhibit lower levels of hopelessness and suicidal ideation. Young males involved in multiple sports seem to garner even more protection in this regard. Similar results were found for girls. Research on the role of exercise in adults confirms that it improves mood and alleviates many forms of depression. Bartko and Eccles les found that youth who are highly involved in sport are more “psychologically resilient,” that is, better able to recover from problems. Eccles et al. found that sport participation protects young athletes against social isolation
3. According to the passage, sport players benefit from

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

Farming now use 10 percent of the earth’s land to produce food

Read the following passage and choose the best answer (A, B, C, D):
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. 
6. Which of the following statements is TRUE, according to the passage?

Read the following passage and choose the best answer (A, B, C, D):
Australia has a well-organized and well-structured education system. The education starts at the age of five or six, but it may differ by a narrow margin between states. It starts with the preschool education which is not compulsory and can be offered within a school or separately. The primary and secondary school encompasses the compulsory education for Australians. There are a large number of primary and high school across the country with most of them being public schools. It is estimated that public schools amount to 60% of scholars as opposed to 40% in private settings. All these education providers must be licensed by the government and must fulfill certain requirements including infrastructure and teaching. Universities, on the other hand, are mainly public institutions. The Australian education system has established a standard curriculum so all scholars will be given the same quality of education. Despite there may be some states at which this curriculum is modified a bit, but the change is not that significant. The actual curriculum set  out in Australia education system is based on important abilities one must have in his life: Literacy, Numeracy, Information and communication technology, Critical and creative thinking, personal and social capability, ethical understanding, intercultural understanding. Vocational and Technical schools prepare students that want to skip the university and want to move directly to the job market. Actually, here it stands the difference between universities and colleges: the Vocational and Technical Schools are more oriented in teaching practical skills while university courses are mainly theory-based to lead students to different academic careers. There are hundreds of other schools out there that provide technical and further education (TAFE) and vocational education and training (VET). These schools offer short courses, certificates I through IV, diplomas, and advanced diplomas. They focus on training their students in a particular vocation or just to help their students get out into the workplace. These schools offer a wide variety of courses and qualifications attained by these courses can lead to different career pathways to follow afterward  Australian higher education modernity and reputation relies on a huge number of educational providers including universities and different training organizations. Currently, there are 43 universities across the country. The vast majority of universities are public except two private universities. The world-class teaching offered is surely undisputed. Seven Australian universities are traditionally found at the top 100 best universities in the world which is a sufficient indicator to highlight their quality. Besides universities, more than 5,000 training organizations are registered and accredited. Actual figures show that the number of enrolled students is around 3.8 million with international students sharing more than half a million. There are also 3 self-accrediting higher education institutions. Furthermore, dozens of smaller schools do not grant any degrees or have an accreditation – these are private schools that focus on theology, business, information technology, natural therapies, hospitality, health, law, and accounting.  
5. The word “They” in paragraph 3 refer to _________

Read the following passage and choose the best answer (A, B, C, D):
The Internet is very much like television, in which it takes time away from other pursuits, provides entertainment and information, but in no way can compare with the warm, personal experience of reading a good book. This is not the only reason why the Internet will never replace books, for books provide the in-depth knowledge of a subject that sitting in front of a computer monitor cannot provide. We can download text from an Internet source, but the aesthetic quality of sheets of downloaded text leave much to be desired. A welldesigned book enhances the reading experience. The book is still the most compact and inexpensive means of conveying a dense amount of knowledge in a convenient package. The easy portability of the book is what makes it the most user-friendly format for knowledge ever invented. The idea that one can carry in one’s pocket a play by Shakespeare, a novel by Charles Dickens or Tom Clancy, Plato’s Dialogues, or the Bible in a small paperback edition is mind-boggling. We take such uncommon convenience for granted, not realizing that the book itself has undergone quite an evolution since the production of the Gutenberg Bible in 1455 and Shakespeare’s First Folio in 1623, just three years after the Pilgrims landed at Plymouth to colonize the New World. Not only has the art and craft of printing and book manufacturing been greatly improved over the centuries, but the great variety of subject matter now available in books is astounding, to say the least. In fact, the Internet requires the constant input of authors and their books to provide it with the information that makes it a useful tool for exploration and learning.  Another important reason why the Internet will never replace books is because those who wish to become writers want to see their works permanently published as books - something you can hold, see, feel, skim through, and read at one’s leisure without the need for an electric current apart from a lamp. The writer may use a word processor instead of a typewriter or a pen and pad, but the finished product must eventually end up as a book if it is to have value to the reading public. The writer may use the Internet in the course of researching a subject just as he may use a library for that purpose, but the end product will still be a book.
5. The word “astounding” in paragraph 3 could be best replaced by ___________

Choose the best answer:
We'll have lunch outside in the garden, _____ it's too cold.

Read the following passage and choose the best answer (A, B, C, D)
In the 1930s, a lot of people in the USA were out of work. Among these people was a man named Alfred Butts. He always had an interest in word games and so, to fill his time, he planned a game which he called “Lexico”. However, he was not completely satisfied with the game, so he made a number of changes to it and, in time, changed its name from “Lexico” to “Alph” and then to “Criss Cross”. He wanted to make some money from his new game but he didn’t have any real commercial success. In 1939, Butts happened to meet a man called Jim Brunot who showed an interest in the new game. The two men worked together on developing the game and in 1948 it was offered for sale in the United States under its new name - “Scrabble”. At first, it didn’t sell very well. In the first year it sold just 2,250 sets and by 1951 it had only reached 8,500 sets a year. Then, in 1952 the manager of Macy’s department store in New York, Jack Strauss, happened to play “Scrabble” while he was on holiday. He thought it was a wonderful game and, when he went back to work after his holiday, he insisted that Macy’s should stock the game and make an effort to call the public’s attention to it. As a result, “Scrabble” became a big success in the United States and it soon spread to Australia and then to other English-speaking countries
5. From the passage we can learn that ____

Read the following passage and choose the best answer (A, B, C, D):
In 1860 the United States was predominantly rural. Most people were engaged in  agriculture, and about 80 percent of the population actually resided on farms or in small villages. Only 20 percent lived in towns and cities of 2,500 or more, the census definition of an urban area after 1880. New York alone in 1860 had more than 1 million people, and only 8 cities could boast about a population of more than 100,000. Thereafter the transition from a rural to a predominantly urban nation was especially remarkable because of its speed. By 1900, urbanization, with all of its benefits, problems, and prospects for a fuller life, became the mark of modern America The changing physical landscape reflected the shift to an urbanized society. Railroad terminals, factories, skyscrapers, apartment houses, streetcars, electric engines, department stores, and the increased pace of life were all signs of an emerging urban America. Indeed, the vitality, dynamic quality, variety, and restless experimentalism in society centered in the urban communities where the only constant factor was change itself.  Urbanization did not proceed uniformly throughout the nation. New England and the Middle Atlantic states contained the highest percentage of city dwellers. In the Middle West, the growth of cities such as Chicago, Milwaukee, Cleveland, and St. Louis showed the importance of urbanization in that region. The three West Coast states also experienced rapid urban growth. In the South, urbanization developed much more slowly, although by 1910 the expansion of transportation, commerce, and industry had greatly increased the population of older cities such as New Orleans and stimulated the growth of new urban centers such as Birmingham. However, the South remained predominantly rural. Only somewhat more than 20 percent of the population in that region was urban by 1910.  In some regions the urban impact had a depressing effect upon the surrounding rural communities. Much of New England in the late nineteenth century presented a discouraging picture of abandoned farms and sickly villages as people forsook the countryside and rushed to the larger towns and cities. In the Middle West, particularly Ohio and Illinois, hundreds of townships lost population in the 1880’s.
6. Which of the following areas of the United States can be inferred to be the most urbanized at the end of the 1800’s?

Read the following passage and choose the best answer (A, B, C, D):
As the world’s population continues to grow, so does the amount of garbage that people produce. On-the-go lifestyles require easily (1) ___________ products, such as soda cans or bottles of water, but the accumulation of these products has led to increasing amounts of plastic pollution around the world. As plastic is composed of major (2) ______________ pollutants, it has the potential to cause great harm to the environment in the form of air, water and land pollution. Put simply, plastic pollution is when plastic has gathered in an area and has begun to (3) _________ impact the natural environment and create problems for plants, wildlife and even human population. Often this includes killing plant life and posing dangers to local animals. Plastic is an incredibly useful material, but it is also made from toxic compounds known to cause illness, and because it is meant for (4) _______, it is not biodegradable. Next time you go for a shopping, don’t forget to carry a paper or cloth bag. Also, try to (5) ______ bringing plastic bags at home and purchasing items with too much of packing. This way you can help in contributing towards the environment in the form of reducing plastic pollution whose ill effects are irreversible

Choose the best answer:
Yuri Gagarin became the first person to eat and drink in …………

Read the following passage and choose the best answer (A, B, C, D):
We find that bright children are rarely held back by mixed- ability teaching. On the contrary, both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming pupils. It does not take into account the fact that children develop at different rates. It can have a bad effect on both the bright and the not-so-bright child. After all, it can be quite discouraging to be at the bottom of the top grade! Besides, it is rather unreal to grade people just according to their intellectual ability. This is only one aspect of their total personality. We are concerned to develop the abilities of all our pupils to the full, not just their academic ability. We also value personal qualities and social skills, and we find that mixed- ability teaching contributes to all these aspects of learning. In our classrooms, we work in various ways. The pupils often work in groups; this gives them the opportunity to learn to co-operate, to share, and to develop leadership skills. They also learn how to cope with personal problems as well as learning how to think, to make decisions, to analyze and evaluate, and to communicate effectively. The pupils learn from each other as well as from the teachers. Sometimes the pupils work in pairs; sometimes they work on individual tasks and assignments; and they can do this at their own speed. They also have some formal class teaching when this is appropriate. We encourage our pupils to use the library, and we teach them the skills they need in order to do this effectively. An advanced pupil can do advanced work; it does not matter what age the child is. We expect our pupils to do their best, not their least, and we give them every encouragement to attain this goal.
9. According to the passage, "streaming pupils" ......

 Read the following passage and then choose the best answer.

Communication in general is process of sending and receiving messages that enables humans to share knowledge, attitudes, and skills. Although we usually identify communication with speech, communication is composed of two dimensions - verbal and nonverbal.

Nonverbal communication has been defined as communication without words. It includes apparent behaviors such as facial expressions, eyes, touching, tone of voice, as well as less obvious messages such as dress, posture and spatial distance between two or more people.

Activity or inactivity, words or silence all have message value: they influence others and these others, in turn, respond to these communications and thus they are communicating.

Commonly, nonverbal communication is learned shortly after birth and practiced and refined throughout a person's lifetime. Children first learn nonverbal expressions by watching and imitating, much as they learn verbal skills.

Young children know far more than they can verbalize and are generally more adept at reading nonverbal cues than adults are because of their limited verbal skills and their recent reliance on the nonverbal to communicate. As children develop verbal skills, nonverbal channels of communication do not cease to exist although become entwined in the total communication process.

According to the writer, …………….

Read the following passage and choose the best answer (A, B, C, D):
Environmentalists often fear that tourists will trample all over sensitive natural resource areas, but tourism may bring the needed and only economic incentives to help drive conservation, said Bynum Boley. Ecotourism and natural resource conservation already have a mutually beneficial relationship that is ideal for creating a sustainable partnership. “Ecotourism destinations benefit in the form of enhanced tourism competitiveness from the protection of quality natural resources,” he said. "Meanwhile, the conservation of these natural resources is increasingly valued since these pristine natural resources are the foundation of the ecotourism industry and the driver of all economic benefits associated with ecotourism." Tourism is a $7.6 trillion global industry, provides 277 million jobs and is a primary income source for 20 of the world’s 48 least-developed countries. It also subsidizes environmental protection and helps protect, conserve and value cultural resources that might otherwise be undervalued by the host community, Boley said. In the newpaper, Boley and coauthor Gary Green said that despite past tension between the tourism industry and environmentalists, the two should team up as allies to fight off increasing conversion of land away from its natural state. Ecotourists not only provide a boost to the economy in such places, they can also motivate landowners into keeping the environment in its natural state instead of converting it into something unsustainable. They could also influence the public perception of conservation, Boley explained, which does not often favor environmental protection. “The public has become increasing less prone to respond to environmental messages,” he said. “Economic messages are needed in order to attract the public’s interest.” Too often, Boley and Green said, unique natural resource areas are converted into urban, suburban and agricultural developments without considering their ecotourism potential. In addition to the lost ecotourism revenue, there are a host of negative environmental consequences such as biodiversity loss, water and food shortages and the land being unable to mitigate the effects of climate change. These areas are not valued for their unique attributes or the valuable natural resources they provide, Green said, “so we lose them.” Tourists have historically been seen as having a negative impact on the environment. Critics complain that they violate fragile and threatened natural environments while contributing to greenhouse gases from the increased number of flights to these exotic and often remote locales. While these criticisms are justified, Boley and Green said responsible programs promote education of ecological conservation and environmental sustainability, fostering a greater understanding and appreciation of these exotic areas  
2. The word “pristine” is closest in meaning to __________

Read the following passage and choose the best answer (A, B, C, D):
There are many strange superstitions in the world. The most common one is related to black cats, (1) ____ are the source of hundreds of unlucky superstitions. It’s a sign of bad luck (2) ____ they walk in front of you or you step on their tails. They even bring bad luck into a house if they sneeze inside! This superstition dates (3) ____ to the Middle Ages when they became associated with witches and evil spirits.  Another common superstition is about walking under a ladder. A more (4) ____ explanation can be traced back to ancient Egypt. The (5) ____ Egyptians believed that the shape of the Pyramids had a special power. It was considered very bad luck to break the “power” of this shape and that’s exactly what walking under a ladder would do!  In addition, in Roman times, people (6) ____ the habit of looking at themselves in pools of water. Some believed that these reflections were in fact “glimpses of the soul”. Any disruption to the water in the pool would bring bad luck to the person looking in it. This superstition lives on with the fear of bad luck from breaking a mirror

Read the following passage and choose the best answer (A, B, C, D):
Practical experience is a must-have for today’s job seekers. According to Brazen Life’s Huffington Post article titled “Why Gaining Work Experience Is More Important Than Your Education,” many colleges and universities report that students who have completed an internship or gained work experience during their studies have higher rates of getting hired. For example, at Iowa State University, of all students who completed a co-op program to earn a BS in engineering, an astounding 90 percent got jobs after graduation. Why is practical experience so important? There are a number of reasons why you need practical work experience. First, it’s simply the smart thing to do when you’re preparing for a career in a specific field. Let’s say it’s your dream to work as a consultant for an international corporate relocation company because you love international travel and you like organizing things. So you get a part-time job working as an office assistant at a corporate relocation company… and you find out it’s very different from what you expected. In short, you realize this isn’t the job for you-and you can concentrate on finding another job where you can put your passion and skills to work, for example in the tourism industry. Alternatively, you might find out that you enjoy the corporate relocation business. That means you’re gaining invaluable industry experience that will look great on your resumé when you apply for a full-time job.  Second, practical work experience teaches valuable soft skills, such as discipline, perseverance, teamwork, leadership skills, communication skills and problem solving. Employers will look for these in candidates and they’ll want to see proof. If you’ve spent a month as a team leader at Homes for Heroes, the leadership skills, teamwork experience and problem-solving abilities you developed there can add significant value to your candidacy. Third, working helps you build your network and can provide you with contacts in your chosen field. These contacts can be extremely useful when it comes to hearing about job leads and interesting opportunities. In addition, if you’ve impressed someone, he or she might be willing to write you a letter of recommendation for a job or a place in a graduate program.  Finally, the company you’re working for might offer you a position after you’ve graduated. Your employer already knows your skills and abilities, and you’re already acquainted with the company-so it’s a win-win situation! 
7. The word “acquainted” in paragraph 4 is closest in meaning to _______

Read the passage carefully and choose the correct answer.

Communication in general is process of sending and receiving messages that enables humans to share knowledge, attitudes, and skills. Although we usually identify communication with speech, communication is composed of two dimensions - verbal and nonverbal. Nonverbal communication has been defined as communication without words. It includes apparent behaviors such as facial expressions, eyes, touching, tone of voice, as well as less obvious messages such as dress, posture and spatial distance between two or more people. Activity or inactivity, words or silence all have message value: they influence others and these others, in turn, respond to these communications and thus they are communicating. Commonly, nonverbal communication is learned shortly after birth and practiced and refined throughout a person's lifetime. Children first learn nonverbal expressions by watching and imitating, much as they learn verbal skills. Young children know far more than they can verbalize and are generally more adept at reading nonverbal cues than adults are because of their limited verbal skills and their recent reliance on the nonverbal to communicate. As children develop verbal skills, nonverbal channels of communication do not cease to exist although become entwined in the total communication process.

Human beings ________.