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

With as few as 5,000 tigers remaining in the world today, time is running quick out for this power animal

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Globally we use more energy than ever before, and the demand is rapidly growing. Economic expansion of emerging market economies, population growth and our increasing use of energy-consuming devices are among the most important contributing factors. About one-third of the radiation hitting Earth’s atmosphere is reflected back out into space by clouds, ice, snow, sand and other reflective surfaces. The other two-thirds is absorbed by the Earth’s surface and the atmosphere. As the land, oceans and atmosphere heat up, they re-emit energy as infrared thermal radiation, which passes through the atmosphere. Heat-trapping gases like carbon dioxide (CO2) absorb this infrared radiation and prevent it from dissipating into space, giving rise to what we know as the greenhouse effect. The accumulation of CO2 and other greenhouse gases in the atmosphere is the dominating driver of recent climate change. CO2 is estimated to be responsible for 64 % of man-made global warming. Other greenhouse gases are released in much smaller amounts but still contribute significantly to the overall warming effect, as they are much more potent heat-trapping gases than CO2. The EU is taking action on many levels. One example is on fluorinated gases that are contributing less than CO2 but still a particular point of concern in addressing climate change. They are used in several types of products, such as in refrigeration, air-conditioning and heat pump equipment. While fluorinated gases are released into the atmosphere in smaller quantities than other greenhouse gases, they are extremely potent – they produce a warming effect 23 000 times greater than CO2. For this reason the EU has decided to control their use. The EU’s regulation on fluorinated greenhouse gases aims at cutting the Union’s emissions by two-thirds compared to 2014 levels. Chemicals are not only part of the problem – they are also part of the solution. Sustainable energy sources like solar power rely on chemical innovation using, for example, nanomaterials. One of the main challenges with renewable energy is how to increase its viability with the help of energy storage solutions. For example, solar panels have the best conditions in the desert, but that is not where most people live. Windmills also produce power during the night, which is when our energy consumption is at its lowest. In other words, technologies to improve energy storage and transportation is one of the important areas of research where innovation is needed  
1. The passage mainly discusses_________.

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

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The demand was so great. They had to reprint the book immediately.

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College is a new and different experience for me. I’m away from home, so I have  many things to adjust to. Being on my own, talking with friendly people, and having Fridays off - these are just some things I like about college.  Living at college, first of all, gives me a sense of responsibility, of being on my own. My parents are not around to say, “No, you’re not going out tonight.” Or “Did you finish your homework?” Everything I do has to be my decision, and that gives me the responsibility of handling my own life. During the second week I was at college, I had to go out and look for a bank where I could open an account. Before that I looked in the phone book since I had no clue about any banks around here or where they were located. Someone told me to go to a bank named Continental Federal Savings. And I had to make my own decision - whether to have a checking or saving account and whether or not to get a card. I’m on my own to make my own decisions.  I also love to have Fridays off. I wouldn’t be able to deal with five days of classes in a row. I love to sleep in. One Thursday night, my roommates and I went to Georgetown. We got in rather early the next morning, and my roommates and I decided to sleep in, something I couldn’t do in high school.  I do like things about college - being on my own and having Fridays off, but this doesn’t mean I don’t think about things at home. Although I like college, I can still get homesick: New York is a pretty good place, too. 
5. The author of the passage seems to be proud of___ 

Find mistakes:
When Andrew saw the question, he were knowing the answer immediately.

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Thunderstorms, with their jagged bursts of lightning and roaring thunder, are actually one of nature’s primary mechanisms for transferring heat from the surface of the earth into the atmosphere. A thunderstorm starts when low-lying pockets of warm air from the surface of the earth begin to rise. The pockets of warm air float upward through the air above that is both cooler and heavier. The rising pockets cool as their pressure decreases, and their latent heat is released above the condensation line through the formation of cumulus clouds. What will happen with these clouds depends on the temperature of the atmosphere. In winter, the air temperature differential between higher and lower altitudes is not extremely great, and the temperature of the rising air mass drops more slowly. During these colder months, the atmosphere, therefore, tends to remain rather stable. In summer, however, when there is a high accumulation of heat near the earth’s surface, in direct contrast to the considerably colder air higher up, the temperature differential between higher and lower altitudes is much more pronounced. As warm air rises in this type of environment, the temperature drops much more rapidly than it does in winter; when the temperature drops more than 4 degrees Fahrenheit per thousand feet of altitude, cumulus clouds aggregate into a single massive cumulonimbus cloud, or thunderhead. In isolation, a single thunderstorm is an impressive but fairly benign way for Mother Earth to defuse trapped heat from her surface; thunderstorms, however, can appear in concert, and the resulting show, while extremely impressive, can also prove extraordinarily destructive. When there is a large-scale collision between cold air and warm air masses during the summer months, a squall line, or series of thunderheads, may develop. It is common for a squall line to begin when an advancing cold front meets up with and forces itself under a layer of warm and moist air, creating a line of thunderstorms that races forward at speeds of approximately forty miles per hour. A squall line, which can be hundreds of miles long and can contain fifty distinct thunderheads, is a magnificent force of nature with incredible potential for destruction. Within the squall line, often near its southern end, can be found supercells, long-lived rotating storms of exceptional strength that serve as the source of tornadoes.
2. The word “mechanisms” in paragraph 1 is most likely ________

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All students ____ wear uniforms at school because it is a rule.

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Allowing adolescents to make more of their own choices was found to be the most common strategy used to encourage independence. Many parents also reported that they are pushing their teenager by no longer doing certain things for them. Regardless of their effort, one quarter of parents surveyed still believe they are the main barrier to their teen’s independence because they are failing to hand over more responsibility. “As children become teenagers, the role of parents shifts to helping them gain the knowledge and experience they will need for being independent adults,” explained poll codirector Sarah Clark. “This process of transitioning from childhood to adulthood includes everything from preparing for work and financial responsibility, to taking care of one’s health and well-being. Our poll suggests that parents aren’t letting go of the reins as often as they could be to help teens successfully make that transition.” The new survey from the University of Michigan involved nearly 900 parents with at least one teenager between the ages of 14 and 18. Overall, 60 percent of the respondents attributed their child’s lack of independence to characteristics such as not being mature or knowledgeable enough to take on more responsibility. By contrast, 25 percent of parents admitted that it is faster and less of a hassle to do things themselves. “It is clear that parents recognize tension in helping teens move toward independence, and they agree that valuable learning experiences often result from a poor decision,” said Clark. “Some parents justify taking control over certain responsibilities because they don’t believe their teen is ‘mature enough.’ Parents need to carve out more time for supporting teens in their transition to adulthood.”  
3. The word “them” in paragraph 2 refers to _______

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Scientists have uncovered a new threat to the world’s endangered coral reefs. They  have found that most are incapable of growing quickly enough to compensate for rising sea levels triggered by global warming. The study suggests that reefs – which are already suffering serious degradation because the world’s seas are warming and becoming more acidic – could also become overwhelmed by rising oceans.  The research – led by scientists at Exeter University and published in Nature this week – involved studying growth rates for more than 200 tropical western Atlantic and Indian Ocean reefs. It was found only 9% of these reefs had the ability to keep up with even the most optimistic rates of sea-level rises forecast by the Intergovernmental Panel on Climate Change. “For many reefs across the Caribbean and Indian Ocean regions, where the study focused, rates of growth are slowing due to coral reef degradation,” said Professor Chris Perry, of Exeter University. “Meanwhile, rates of sea-level rise are increasing – and our results suggest reefs will be unable to keep up. As a result, water depths above most reefs will increase rapidly through this century.”  Sea levels rose by several inches over the past century and measurements indicate the speed of this increase is now rising significantly. Two key factors are involved: climate change is making ocean water warmer and so it expands. And as ice sheets and glaciers melt, they increase amounts of water in the oceans.  At the same time, reefs are being weakened by ocean warming and also by ocean acidification, triggered as the seas absorb more and more carbon dioxide. These effects lead to bleaching events that kill off vast stretches of coral and limits their ability to grow.  “Our predictions, even under the best case scenarios, suggest that by 2100, the inundation of reefs will expose coastal communities to significant threats of shoreline change,” said co-author Prof Peter Mumby of Queensland University. This point was backed by US marine scientist Ilsa Kuffner writing in a separate comment piece for Nature. “The implications of the study are dire. Many island nations and territories are set to quickly lose crucial natural resources.” 
7. The author implies in the last paragraph that _____________

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.

The phrase “to be wired" in paragraph 1 means     .

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If/ people/ breath/ contaminate/ air, they/ have/ breathing problems.

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I’m going to stay with my uncle for about 3 weeks.

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Most households in the UK will have a broadband connection and a lot of those  houses will also have experienced connection or speed issues. But what if there was a way to connect to the internet and benefit from a direct connection with much faster speeds? Enter Li-Fi.  Li-Fi stands for Light Fidelity and is a Visible Light Communications (VLC) system which runs wireless communications that travel at very high speeds. With Li-Fi, your light blub is essentially your router. It uses common household LED light bulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.  Li-Fi and Wi-Fi are quite similar as both transmit data electromagnetically. However, Wi-Fi uses radio waves, while Li-Fi runs on visible light waves. This means that it accommodates a photo-detector to receive light signals and a signal processing element to convert the data into “streamable” content. For example, data is fed into an LED light bulb, it then sends data at rapid speeds to the photo-detector. The tiny changes in the rapid dimming of LED bulbs is then converted by the “receiver” into electrical signal. The signal is then converted back into a binary data stream that we would recognise as web, video and audio applications that run on internet-enabled devices.  While some may think that Li-Fi with its 224 gigabits per second leaves Wi-Fi in the dust, Li-Fi’s exclusive use of visible light could halt a mass uptake. Li-Fi signals cannot pass through walls, so in order to enjoy full connectivity, capable LED bulbs will need to be placed throughout the home. Not to mention, Li-Fi requires the light bulb is on at all times to provide connectivity, meaning that the lights will need to be on during the day. Additionally, where there is a lack of light bulbs, there is a lack of Li-Fi internet so Li-Fi does take a hit when it comes to public Wi-Fi networks.  However, using Li-Fi instead of Wi-Fi, you’ll negate lots of security problems associated with shared and often overloaded broadband networks. It will also be advantageous in areas where radio frequency waves do not reach. Due to its impressive speeds, Li-Fi could make a huge impact on the internet of things too, with data transferred at much higher levels with even more devices able to connect to one another. 
5. The word “It” in paragraph 2 refers to _____

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The field of 3-D printing comes with a new set of legal questions hospitals using the  technology will need to consider, said Bruce Kline, a technology licensing manager who oversees patents for new technology developed at Mayo Clinic. For starters, he said the STL file printers use are a lot like MP3 music files, in that they can be protected under copyright and require licensing to use. Copyright violations can occur if a purchased STL anatomical model file for rare disease is illegally shared with another institution that did not purchase the file from the vendor that created the file.  Under the law, if a device has a functional use it falls under patent law. If it is not functional, it falls under copyright law. Kline said most medical 3-D printing for educational models and complex anatomy evaluation currently falls under copyright. But, he said that will rapidly change in the coming years as customizable 3-D printable medical devices see wider use.  Additive manufacturing (AM) allows the creation of patient-specific devices at the point of care. Kline said an interesting fact is that these devices are FDA 510(k)-exempt if produced by a hospital instead of a medical device vendor. He said this blurs the lines between traditional vendor relationships, since the hospital can now become the manufacturer. However, if a hospital makes a device, it also becomes liable for it. He advised that it might be better for a commercial vendor to make the device for the hospital so the vendor assumes the liability of the device. Custom-made medical devices are also exempt under FDA regulations, Kline said. So, if a physician creates or modifies a device to meet the clinical needs of a specific patient’s anatomy, he said it is acceptable to use under current FDA rules. This may leave the door wide open for use of 3-D printed devices that are customized for each patient using their own 3-D imaging datasets.  It is possible printable device files may become available in the next few years to customize and print on demand. However, Kline said it will be much more difficult to enforce patents on these types of devices. He explained if someone makes one or two devices, there is no economical way for the creator of those device files to go after the user/maker of of unlicensed copies of the device to claim lost profits.
5. The word “liable” in paragraph 3 is closest in meaning to _______

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College is usually the first time young people are on their own without parents’ guidance or rules. Students learn to participate (1) _____ a responsible member of various groups within the college environment: fellow students, roommates, teachers, college staff, sports teammates, religious groups, study groups, romantic partners or extracurricular clubs. You’ll also learn how to grow your sense of (2)_____ identity. “Socialization is a process of learning what it means to be a member of a group and navigating one’s sense of self as (3) _____ of that process. Because there are many different groups on a college (4)_____ socialization might include finding like-minded peers on campus to differentiate one’s self from others and (5) _____ closer bonds with some group members (as in fraternities and sororities),” explained Karen Sternheimer, Associate Professor of Sociology at the University of Southern California

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The research on tourism was .................... by scientists at the most famous national university.

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When you volunteer, it might be one of the best ways to gain hands-on experience for  a future career. And giving a (1) ________________ hand to a community won’t just result in great networking opportunities but the experience can also be a great addition to your skill set and CV. With each new volunteering job comes training with a different (2) ________________ of skills. These skills might seem basic and unhelpful while training but can become a great benefit soon. If you develop new abilities, it’ll help set you (3) _______________ in the job market. It can also make you more productive and successful. Volunteering broadens your experience and exposure to life. And it won’t just help you make a difference in a community, it’ll (4) _________ help you on a personal level. Are you planning on becoming a nurse or doctor? Volunteer at your local hospital. Are you following a career in environmental science? Find a (5)______________________ restoration programme. This is the perfect opportunity to gain essential leadership experience that all employers want to see

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

   As viewed from space, Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million kilometers (93 million miles), Earth is the third planet from the Sun and the fifth largest planet in the solar system.

   Our planet’s rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Earth’s atmosphere protects us from meteors as well, most of which burn up in the Earth’s atmosphere before they can strike the surface. The planet active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it formed about 4.6 billion years ago. The Earth has a single natural satellite – the moon.

Approximately how much of the Earth’s atmosphere is nitrogen?

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My uncle _______ a visit to Germany in 2005.

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Many countries in Asia agreed to _____ diplomatic relations.