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Scientists have developed a new bionic computer chip that can be mated with human cells to combat disease. The tiny device, smaller and thinner than a strand of hair, combines a healthy human cell with an electronic circuitry chip. Doctors can control the activity of the cell by controlling the chip with a computer.
It has long been established that cell members become permeable when exposed to electrical impulses. Researchers have conducted genetic research for years with a trial-and-error process of bombarding cells with electricity in an attempt to introduce foreign substances such as new drug treatments or genetic material. They were unable to apply a particular level of voltage for a particular purpose. With the new invention, the computer sends electrical impulses to the chip, which triggers the physicians to open a cell‘s pores with control.
Researchers hope that eventually they will be able to develop more advanced chips whereby they can choose a particular voltage to activate particular tissues, whether they be muscle, bone, brain, or others. They believe that they will be able to implant multiple chips into a person to deal with one problem or more than one problem.

The author indicates that it is expected doctors will be able to     .

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Hunting Down the Truth about Killer Whales
Hearing that killer whales are in the area is sure to strike fear in the heart of anyone at sea. The thought of coming across a creature with a menacing name like that is a surefire sign you are on a path to destruction. As it turns out, killer whales, orcas, are actually highly sophisticated creatures that are usually harmless to humans. The title “killer whale” may actually be a mistranslation of the Spanish term “ballena asesina”, which means assassin whale. Orcas were nicknamed this due to their well-coordinated attacks on marine life, not for the danger they pose to humans. At nearly five to seven metres in length and a weight of over six tons, orcas are one of the largest creatures on the Earth. There are about 50,000 orcas worldwide that are spread out in several oceans. Orcas are classified as an Apex predator, which means no other creature hunt them for food. Scientists believe that there are between three to five different types of orca and they are all quite distinctive. The most frequently seen of these are Residents. They live in close-knit family units called pods, which can contain over 50 members, and their diet consists mainly of fish. Transient whales, however, prefer to travel in smaller groups of two to six whales. Meanwhile, Offshore whales were only recently discovered in 1988. They prefer to swim farther away from land than the others and several pods may come together to form groups as large as 200 whales. Although these orca groups may seem similar to the naked eye, they are extremely different in many ways, and scientists believe they haven’t interbred in thousands of years. Researchers also acknowledge that their knowledge of orcas is limited, and even more groups may exist. Male orcas have an average lifespan of about 30 years, while the average age for females is 50. However, there have been cases of females living up to 90 years. Yet when kept in captivity at marine entertainment parks, their life expectancies drop dramatically. In fact, it seems that the biggest threat to orcas these days is humans. Between the practices of hunting orcas, polluting their environments, and capturing them for entertainment purposes, we are making it very difficult for them to survive. Perhaps the killer whales aren’t the real killer after all.
2. What can be said about the different types of killer whales?

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Overpopulation, the situation of having large numbers of people with too few resources and too little space, is closely associated with poverty. It can result from high population density, or from low amounts of resources, or from both. Excessively high population densities put stress on available resources. Only a certain number of people can be supported on a given area of land, and that number depends on how much food and other resources the land can provide. In countries where people live primarily by means of simple farming, gardening, herding, hunting, and gathering, even large areas of land can support only small numbers of people because these labor-intensive subsistence activities produce only small amounts of food.
In developed countries such as the United States, Japan, and the countries of Western Europe, overpopulation generally is not considered a major caus of poverty. These countries produce large quantities of food through mechanized farming, which depends on commercial fertilizers, large-scale irrigation, and agricultural machinery. This form of production provides enough food to support the high densities of people in metropolitan areas.
A country’s level of poverty can depend greatly on its mix of population density and agricultural productivity. Bangladesh, for example, has one of the world’s highest population densities, with 1, 147 persons per sq km. A large majority of the people of Bangladesh engage in low – productivity manual farming, which contributes to the country’s extremely high level of poverty. Some of the smalleer countries in Western Europe, such as the Netherlands and Belgium, have high population densities as well. These countries practice mechanized farming and are involved in high-tech industries, however, and there fore have high standards of living.
At the other end of the spectrum, many countries in sub-Saharan Africa have population densities of less than 30 persons per sq km. Many people in these countries practice manual subsistence farming; these countries also have infertile land, and lack the economic resources and technology to boost productivity. As a consequence, these nations are very poor. The United States has both relatively low population density and high agricultural productivity; it is one of the world’s wealthiest nations.
High birth rates contribute to overpopulation in many developing countries. Children are assets to many poor families because they provide labor, usually for farming. Cultural norms in traditionally rural societies commonly sanction the value of large families. Also, the governments of developing countries often provide little or no support, financial or political, for family planning; even people who wish to keep their families small have difficulty doing so. For all these reasons, developing countries tend to have high rates of population growth.
(From “Poverty” by Thomas J. Corbett)

Which of the following is TRUE, according to the passage?

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Getting Curious about Curiosity’s Mission to Mars
The topic of space exploration reached a high point during the 1960s, as Soviets and Americans competed for dominance. Yet after the Soviets put the first man in space and Americans landed the first men on the moon, many people lost interest as nothing else could compare to these groundbreaking accomplishments. Recently, a robotic rover on a mission to Mars has generated massive interest the public. Curiosity is a robotic car-sized rover that is part of NASA’s long-term plan to learn more about the terrain and conditions on the Red Planet. One of its main goals was to determine whether or not it was possible for life to develop on Mars. Using mechanical arms, Curiosity can gather soil and rock samples from the ground and analyze them to determine their chemical composition. Since transporting around Mars was vital to the success of the mission, a lot of effort was put into Curiosity’s transportation abilities. Mars’ terrain is not smooth, so designers enabled Curiosity to roll over bumpy areas. Once Curiosity left the Earth, there would be no opportunities to repair it, so engineers also had to be spot on about Curiosity’s power solution. Therefore, they devised a system that can generate power internally from a radioisotope generator. Finally, to capture stunning pictures of Mars, Curiosity was equipped with several state-of-the-art cameras. The cameras also help the rover avoid hazards, navigate, and detect information about the atmosphere. After a 350-million-mile journey, Curiosity landed on Mars in 2012, an impressive 1.5 miles away from its initial target. Upon arrival, NASA’s website crashed due to an overload of visitors. People just couldn’t seem to get enough information on the mission. But the real thrills came in the weeks and months that followed, as people got their first real glimpse about what life was really like on Mars. The mission was originally supposed to last for two years, but scientists are now optimistic that it could continue for up to 15 years, depending on Curiosity’s condition. No matter what happens at this point, it is safe to say that Curiosity’s mission to Mars has been a smashing success.
5. Why did NASA’s website crash in 2012?

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Voluntary work helps foster independence and imparts the ability to deal with different situations, often simulaneously, thus teaching people how to (1)____ their way through different systems. It therefore brings people into touch with the real worls; and, hence, equips them for the future. Initially, young adults in their late teens might not seem to have the expertise or knowledge to impart to others that say a teacher or an agriculturalist or a nurse would have, (2)____ they do have many skills that can help others. And in the absence of any particular talent, their energy and enthusiasm can be harnessed for the benefit (3) ____ their fellow human beings, and ultimately themselves. From all this, the gain to any community no matter how many voluntees are involved is (4)_____ Employers will generally look favorably on people (5)_____ have shown an ability to work as part of a team. It demonstrates a willingness to learn and an independent spirit, which would be desirable qualities in any employee.

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Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive.
Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'.

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.
It is true that digital manufacturing does cut out the middle-man. More and more routine, repetitive assembly tasks will be taken (1).......... by machines. But as certain jobs disappear, new ones open up in other parts of the factory. Germany in many ways exemplifies this trend. Today, German manufacturers (2)........... three times more robots than U.S. companies, but they also still employ more humans. Relative to the size of our economies, German's manufacturing workforce is twice the size of America's.
From its very beginning, the fourth Industrial revolution has never presented manufacturers with an either-or choice - robots or humans. It has always been about combining the talents of (3)........... (4)..........., it is the convergence of artificial and human intelligence that will enable manufacturers to achieve a new era of speed, flexibility, efficiency and connectivity in the 21st century. Machines have the ability to assemble things faster than any human ever could, but humans possess the analytics, domain expertise and valuable knowledge (5).......... to solve problems and optimize factory floor production.

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

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Traveling in the Future
These days, if you want to travel from New York to Beijing, the flight takes about 16 hours. You also have to wait at the airport, and sometimes you have to transfer onto a different airplane. If you add all of that extra time, the trip takes at least 20 hours. But in the future, the trip from New York to Beijing might only take two hours. Right now, a private company is developing something called ET3. ET3 stands for “evacuated tube transport technology”. Here is how it works. A tube goes all the way from New York to Beijing. The tube is only a few meters wide. Capsules move through the tube. Six people can sit in one capsule. The capsules use electricity instead of gasoline. For international travel, the capsules can travel at about 6,500 kilometers per hour. That is much faster than airplane – most modern airplanes usually only fly at about 800 kilometers per hour. So how is this possible? How can these capsules travel so fast? The answer is that there is no air inside the tube. When airplanes fly, they have to move through the air. The air slows the airplanes down. Because there is no air in the ET3 tubes, the capsules are able to move at a very high speed. Besides, the capsules are quite light. They only weigh 183 kilograms. There are other advantages to ET3. Because it uses electricity, it is quite clean. In addition, it is much quieter than airplanes and cars. Finally, ET3 tubes and capsules don’t require very much building material. Of course, ET3 doesn’t exist yet. The technology is still being developed. Developers still have to solve a lot of problems. The biggest problem is that right now, ET3 would be far too expensive. In order to make ET3 cheaper, we will need much better technology. It is exciting to think of how ET3 will change travel in the future. Maybe someday, you will be able to have lunch in New York and dinner in Beijing.
6. According to the passage, which statement is true?

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He does not know much about the project but he is very ______.

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Eat / healthy/ be / important / part / maintain / good / health.

Music, artful arrangement of sounds (1) _______ time. This definition is obviously very broad, but a narrower one would exclude (2) _______ much. Music is part of virtually every culture on (3) _______, but it varies widely among cultures in style and structure. Definitions of music can (4) _______ dramatically over a short time, as they have across the world during the 20th (5) _________.

(35)_________

The first relief assistance mission organized by the League was an aid mission for the _____ of a famine and subsequent typhus epidemic in Poland.

(463)______

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The _______ of policy is not our business - our job is to put it into practice.

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Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age

Thank you for taking the time to meet with me today. I ---135--- our conversation, and I remain very interested in the position of the cost accountant. I would welcome the opportunity to return for the third and final round of ---136---.I am confident my years of accounting experience would benefit your firm. As discussed, over the last ten years, I have helped many companies save a ---137--- the amount of money. I am especially adept at analyzing the day-to-day operations of a business and helping to determine more cost-effective methods. I checked regarding your question about a potential start date.---138---. I hope to hear from you in the near future. 

137..........

Up to now, ______ space exploring still remains _____ very risky, complex, and expensive endeavor.

(324)______

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The host nation was Uruguay and it __________ Argentina in the final.

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Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

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Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like. What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important. The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem. Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two. Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.
4. It can be inferred from paragraph 3 that

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Animals have an intuitive awareness of quantities. They know without analysis the difference between a number of objects and a smaller number. In his book "The Natural History of Selboure" (1786), the naturalist Gilbert White tells how he surreptitiously removed one egg a day from a plover's nest, and how the mother laid another egg each day to make up for the missing one. He noted that other species of birds ignore the absence of a single egg but abandon their nest if more than one egg has been removed. It has also been noted by naturalists that a certain type of wasp always provides five - never four, never six - caterpillars for each of their eggs so that their young have something to eat when the eggs hatch. Research has also shown that both mice and pigeons can be taught to distinguish between odd and even numbers of food pieces.
These and similar accounts have led some people to infer that creatures other than humans can actually count. They also point to dogs that have been taught to respond to numerical questions with the correct number of banks, or to horses that seem to solve arithmetic problems by stomping their hooves the proper number of times.
Animals respond to quantities only when they are connected to survival as a species - as in the case of the eggs - or survival as individuals - as in the case of food. There is no transfer to other situations of from concrete reality to the abstract notion of numbers. Animals can "count" only when the objects are present and only when the numbers involved are small - not more than seven or eight. In lab experiments, animals trained to "count" one kind of object were unable to count any other type. The object, not the numbers, are what interest them. Animals' admittedly remarkable achievements simply do not amount to evidence of counting, nor do they reveal more than innate instincts, refined by the genes of successive generations, or the results of clever, careful conditioning by trainers.

According to information in the passage, which of the following is LEAST likely to occur as a result of animals' intuitive awareness of quantities?

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Scientists ____ on the site found many ancient tools, tombs and pottery, and made some important archaeological discoveries.