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

Before diamonds can be used as jewels, they must be cut and polish

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At the ____ level, you can join three-year or four-year colleges.

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

 Socially has to be prepared to support its elderly people

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:
Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Pfiesteria in 3,000-year-old sea floor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria.
Lately, however, blooms – or huge, dense populations – of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina’s Neuse River, nearly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fisherman and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment.
For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and waste water from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.

In which enviromnent would you NOT expect a Pfiesteria bloom to develop?

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Global sea level has been rising over the past century, and the rate has increased in recent decades. In 2014, global sea level was 2.6 inches above the 1993 average-the highest annual average in the satellite record (1993-present). Sea level continues to rise at a rate of about one-eighth of an inch per year. Higher sea levels mean that deadly and destructive storm surges push farther inland than they once did, which also means more frequent nuisance flooding. Disruptive and expensive, nuisance flooding is estimated to be from 300 percent to 900 percent more frequent within U.S. coastal communities than it was just 50 years ago. The two major causes of global sea level rise are thermal expansion caused by warming of the ocean since water expands as it warms, and increased melting of land-based ice, such as glaciers and ice sheets. The oceans are absorbing more than 90 percent of the increased atmospheric heat associated with emissions from human activity. With continued ocean and atmospheric warming, sea levels will likely rise for many centuries at rates higher than that of the current century. In the United States, almost 40 percent of the population lives in relatively high-population-density coastal areas, where sea level plays a role in flooding, shoreline erosion, and hazards from storms. Globally, eight of the world’s 10 largest cities are near a coast, according to the U.N. Atlas of the Oceans. Sea level rise at specific locations may be more or less than the global average due to local factors such as land subsidence from natural processes and withdrawal of groundwater and fossil fuels, changes in regional ocean currents, and whether the land is still rebounding from the compressive weight of Ice Age glaciers. In urban settings, rising seas threaten infrastructure necessary for local jobs and regional industries. Roads, bridges, subways, water supplies, oil and gas wells, power plants, sewage treatment plants, landfills-virtually all human infrastructure-is at risk from sea level rise. 
6. The word “relatively” in the paragraph 4 could be best replaced by ______

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The human desire for companionship may feel boundless, but research suggests that  our social capital is finite. Social scientists have used a number of ingenious approaches to gauge the size of people’s social networks; these have returned estimates ranging from about 250 to about 5,500 people. An undergraduate thesis from MIT focusing exclusively on Franklin D. Roosevelt, a friendly guy with an especially social job, suggested that he might have had as many as 22,500 acquaintances. Looking more specifically at friendship, a study using the exchange of Christmas cards as a proxy for closeness put the average person’s friend group at about 121 people.  However vast our networks may be, our inner circle tends to be much smaller. The average American trusts only 10 to 20 people. Moreover, that number may be shrinking: From 1985 to 2004, the average number of confidants that people reported having decreased from three to two. This is both sad and consequential, because whoever has strong social relationships tends to live longer than those who don’t. So what should you do if your social life is lacking? Just follow the research. To begin with, don’t dismiss the humble acquaintance. Even interacting with people with whom one has weak social ties has a meaningful influence on well-being. Beyond that, building deeper friendships may be largely a matter of putting in time. A recent study out of the University of Kansas found that it takes about 50 hours of socializing to go from acquaintance to casual friend, an additional 40 hours to become a “real” friend, and a total of 200 hours to become a close friend. If that sounds like too much effort, reviving dormant social ties can be especially rewarding. Reconnected friends can quickly recapture much of the trust they previously built, while offering each other a dash of novelty drawn from whatever they’ve been up to in the meantime. And if all else fails, you could start randomly confiding in people you don’t know that well in hopes of letting the tail wag the relational dog. The academic literature is clear: Longing for closeness and connection is pervasive. Which suggests that most of us are stumbling through the world pining for companionship that could be easily provided by the lonesome stumblers all around us.
4. The word “dismiss” in paragraph 3 is closest in meaning to _______

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New data from the New York Fed highlights how the job situation for recent  graduates is worsening. While the rest of the labor market trends favorably, fresh graduates are more likely to be unemployed than the base U.S. working population. That has not happened before in the New York Fed data going back to 1990.  While the unemployment rate for all college graduates aged up to 65 is trending lower — currently near its lowest level of this current economic cycle — the market for recent college graduates is bucking the overall trend. With the backdrop of a robust U.S. labor market, this is “an important and worrisome trend to watch because it never dropped to prior cycle lows,” DataTrek’s Jessica Rabe wrote in a note. “Even though those who have graduated from college typically get hired before less educated workers.”  The rates are calculated as a 12-month moving average. Recent college graduates are defined as those between the ages of 22 and 27, with a bachelor’s degree or higher. The unemployment rate for recent college graduates has been inching upwards, from 3.8% in May to 4% in September. In contrast, the unemployment rate for overall workers was 3.6% in September.  Fresh graduates are having a hard time because of the lack of experience and relevant education, according to Brusuelas. “There’s some concern about the unemployment rate … [but] that may have more to do with the level of experience and difficulties in finding entry level work right now for the educated class.” Moody’s Analytics Chief Economist Mark Zandi previously told Yahoo Finance that the trend also “likely reflects in part greater caution by businesses given the slowing economy and uncertainty created by the trade war.” 
5. According to paragraph 4, what is NOT related to the alarming situation of unemployment?

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In today’s fast-paced industry, learning will most likely involve seeking new skills in ways that challenge the norm. But thankfully, there is a promise for such lifelong learning online - the promise that will save your time and money while helping you earn more of both. Provided you have access to a decent computer and the Internet, the barrier to getting started is probably lower than it ever has been. And with those things in place, it is a matter of finding the content you wish to learn. So, to help others who may be looking to maximize their own learning efforts, I have listed some quick tips below. First, set achievable goals. When you start learning, it is a good idea to set goals about what you want to learn or what you might do with your newly acquired knowledge. It might be landing that new job, building a tangible product, or impressing your current management. The goals may vary in size and complexity, but do revisit these goals throughout your learning process. Within a couple weeks, ask yourself: “Am I getting closer to my goal?” or “Am I learning the skills necessary to reach my goals?”. If you are not, then you may need to look elsewhere. Second, learn with others. By yourself, learning anything has a high propensity to become frustrating. Try teaming up with friends or colleagues. They can often be your best resource for maintaining motivation while you learn. Third, make it a habit. Online habits often include scrolling through social media or watching videos on YouTube. If you have the downtime for such activities, then you could spend that downtime learning something. And why not learn something? If you do, then you will have plenty more to talk about on social media anyways. So, make learning your new online habit by making a commitment to learn something new each day. 
1. According to the passage, what are the basic conditions for learning online? 

What is 'extreme' weather? Why are people talking about it these days? 'Extreme' weather is an unusual weather event such as rainfall, a drought or a heat wave in the wrong place or at the wrong time. In theory, they are very rare. But these days, our TV screens are constantly showing such  extreme weather events. Take just three news stories from 2010: 28 centimetres of rain fell on Riode Janeiro in 24 hours, Nashville, USA, had 33 centimetres of rain in two days and there was record  rainfall in Pakistan.

The effects of this kind of rainfall are dramatic and lethal. In Rio de Janeiro, landslides followed,  burying hundreds of people. In Pakistan, the floods affected 20 million people. Meanwhile, other parts of the world suffer devastating droughts. Australia, Russia and East Africa have been hit in the last ten years. And then there are unexpected heat waves, such as in 2003 in Europe. That summer, 35,000 deaths were said to be heat-related.

So, what is happening to our weather? Are these extreme events part of a natural cycle? Or are they caused by human activity and its effects on the Earth's climate? Peter Miller says it's probably a mixture of both of these things. On the one hand, the most important influences on weather events are natural cycles in the climate. Two of the most famous weather cycles, El Niño and La Niña, originate in the Pacific Ocean. The heat from the warm ocean rises high into the atmosphere and affects weather all around the world. On the other hand, the temperature of the Earth's oceans is slowly but steadily going up. And this is a result of human activity. We are producing greenhouse gases that trap heat in the Earth's atmosphere. This heat warms up the atmosphere, land and oceans. Warmer oceans produce more water vapour - think of heating a pan of water in your kitchen. Turn up the heat, it produces steam more quickly. Satellite data tells US that the water vapour in the atmosphere has gone up by four percent in 25 years. This warm, wet air turns into the rain, storms, hurricanes and typhoons that we are increasingly experiencing. Climate scientist, Michael Oppenheimer, says that we need to face the reality of climate change. And we also need to act now to save lives and money in the future.

(Source: © 2015 National Geographic Learning, www.ngllife.com/wild-weather)

The word —that 11 in the third paragraph refers to________.

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In fact, two out of three working Americans are not (1)______ in their work,  according to a Gallup survey. People who send résumés and go to interviews think that they care only about salaries and (2)______. These are important, yes, but they are not enough. To identify a satisfying job, people should be thinking about office morale and doing work that is interesting and fun.  To demonstrate this point, my colleague Kaitlin Woolley and I asked a large group of employees what made them like their present jobs, along with what factors would (3)_____ them to like future jobs.  Unsurprisingly, we found that promotions and raises were important for people both in their current job and in applying for future jobs. What was interesting, (4)______, was that the majority cared a lot about present benefits (such as doing something interesting with people they like) in their current job, but they expected not to care very much about those things in their future jobs. When envisioning themselves in the future, they predicted that they would almost solely be driven by delayed benefits like salaries.  Why are people (5)______ aware that present benefits are important in their current job, and yet expect not to care about those benefits in the future? Why, for example, does a student who cannot sit through a boring two-hour lecture think she would be satisfied by a boring but well-paying job?

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When Gustave Eiffel’s company built Paris’ most recognizable monument for the 1889 World’s Fair, many regarded the massive iron structure with skepticism. Today, the Eiffel Tower, which continues to serve an important role in television and radio broadcasts, is considered an architectural wonder and attracts more visitors than any other paid tourist attraction in the world. In 1889, Paris hosted an Exposition Universelle (World’s Fair) to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance. The commission was granted to Eiffel et Compagnie, a consulting and construction firm owned by the acclaimed bridge builder, architect and metals expert Alexandre-Gustave Eiffel. While Eiffel himself often receives full credit for the monument that bears his name, it was one of his employees - a structural engineer named Maurice Koechlin—who came up with and fine-tuned the concept. Several years earlier, the pair had collaborated on the Statue of Liberty’s metal armature. Eiffel reportedly rejected Koechlin’s original plan for the tower, instructing him to add more ornate flourishes. The final design called for more than 18,000 pieces of puddle iron, a type of wrought iron used in construction, and 2.5 million rivets. Several hundred workers spent two years assembling the framework of the iconic lattice tower, which at its inauguration in March 1889 stood nearly 1,000 feet high, and was the tallest structure in the world - a distinction it held until the completion of New York City’s Chrysler Building in 1930. In 1957, an antenna was added that increased the structure’s height by 65 feet, making it taller than the Chrysler Building but not the Empire State Building, which had surpassed its neighbor in 1931. Initially, only the Eiffel Tower’s second-floor platform was open to the public; later, all three levels, two of which now feature restaurants, would be reachable by stairway or one of eight elevators. Millions of visitors during and after the World’s Fair marveled at Paris’ newly erected architectural wonder. Not all of the city’s inhabitants were as enthusiastic, however: Many Parisians either feared it was structurally unsound or considered it an eyesore. The novelist Guy de Maupassant, for example, allegedly hated the tower so much that he often ate lunch in the restaurant at its base, the only vantage point from which he could completely avoid glimpsing its looming silhouette.  
4. According to paragraph 2, which of the following is NOT mentioned as Alexandre-Gustave Eiffel’s occupation?

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Most of the viewers imagine that the presenter does little (1)______arrive at the  studio a few minutes before the broadcast, read the weather, and then go home. In fact, this image is far from the truth. The two-minute (2) ____ which we all rely on when we need to know tomorrow’s weather is the result of a hard day’s work by the presenter, who is actually a highly-qualified (3)_______. Every morning, after a weather forecaster arrives at the TV studios, his/her first task of the day is to collect the latest data from the National Meteorological Office. The information is very detailed and includes predictions, satellite and radar pictures, as well as more technical data. After gathering all the relevant material from this office, the forecaster has to (4)________ the scientific terminology and maps into images and words which viewers can easily understand. The final broadcast is then carefully planned. The presenter decides what to say and in what order to say it. Next a “story board” is drawn up which lays out the script word for word. The time allocated for each broadcast can also alter. This is because the weather report is screened after the news, (5)__________ can vary in length. The weather forecaster doesn’t always know how much time is available, which means that he/she has to be thoroughly prepared so that the material can be adapted to the time available.

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Social networking sites such as Facebook and MySpace do not help you make more  genuine close friends, according to a survey by researchers who studied how the websites are changing the nature of friendship networks. Although social networking on the internet helps people to collect hundreds or even thousands of acquaintances, the researchers believe that face to face contact is nearly always necessary to form truly close friendships.  “Although the numbers of friends people have on these sites can be massive, the actual number of close friends is approximately the same in the face to face real world,” said psychologist Will Reader, from Sheffield Hallam University. Social networking websites such as Facebook, Bebo and MySpace have taken off rapidly in recent years. Facebook was launched initially in 2004 for Harvard University members but has since expanded to more than 34 million users worldwide. MySpace, which was set up in 2003, has more than 200 million users and was bought by Rupert Murdoch’s News Corporation in 2005 for $580m (£285m). Previous research has suggested that a person’s conventional friendship group consists of around 150 people, with five very close friends but larger numbers of people whom we keep in touch with less regularly. This figure is so consistent that scientists have suggested it is determined by the cognitive constraints of keeping up with large numbers of people. But Dr. Reader and his team have found that social networking sites do allow people to stretch this figure. The team asked more than 200 people to fill in questionnaires about their online networking, asking for example how many online friends they had, how many of these were close friends and how many they had met face to face. The team found that although the sites allowed contact with hundreds of acquaintances, as with conventional friendship networks, people tend to have around five close friends. Ninety per cent of contacts whom the subjects regarded as close friends were people they had met face to face. “People see face to face contact as being absolutely imperative in forming close friendships,” added Dr. Reader. He told the British Association Festival of Science in York that social networking sites allow people to broaden their list of nodding acquaintances because staying in touch online is easy. “What social network sites can do is decrease the cost of maintaining and forming these social networks because we can post information to multiple people,” he said.  But to develop a real friendship we need to see that the other person is trustworthy, said Dr. Reader. "What we need is to be absolutely sure that a person is really going to invest in us, is really going to be there for us when we need them … It’s very easy to be deceptive on the internet."
7. What does the author imply in the last paragraph?

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Graphic novels, as the name suggests, are books written and illustrated in the style of a comic book. Adults may feel that graphic novels do not help children become good readers. They believe that this  type of  reading material  somehow prevents  "real"   reading. (1)_____ , many quality graphic novels are now being seen as a method of storytelling on the same level as novels, films or audiobooks. Many librarians and teachers are now accepting graphic novels as proper literature for children as they (2)____ young people and motivate them to read. This has been especially true with children who are not (3)_________to read, especially boys.Language learners are also motivated by graphic novels because the pictures provide clues to the meaning of the words. Therefore, they will (4)______ new vocabulary more quickly. Many teachers have reported great success when they used graphic novels with their students, especially in the areas of English, social studies and art. The idea that graphic novels are too simple to be regarded as serious reading is no longer valid. Reading them can, undoubtedly, help students develop the skills (5) _____ are necessary to read more challenging works

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:
Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a  peaceful scene that electric light just cannot match.
Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.
In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle- making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.
Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.
For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle- making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects – some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.
Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.
Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

What does the passage warn readers not to do?

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City/ children/ have/ more/ interesting life/ country ones.

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Herman Melville, an American author best known today for his novel Moby Dick, was actually more popular during his lifetime for some of his other works. He traveled extensively and used the knowledge gained during his travels as the basis for his early novels. In 1837, at the age of eighteen, Melville signed as a cabin boy on a merchant ship that was to sail from his Massachusetts home to Liverpool, England. His experiences on this trip served as a basis for the novel Redburn (1849). In 1841, Melville set out on a whaling ship headed for the South Seas. After jumping ship in Tahiti, he wandered around the islands of Tahiti and Moorea.This South Sea island sojourn was a backdrop to the novel Omoo (1847). After three years awayfrom home, Melville joined up with a U.S. naval frigate that was returning to the eastern United States around Cape Horn. The novel White Jacket (1850) describes this lengthy voyage as a navy seaman. With the publication of these early adventure novels, Melville developed a strong and loyal following among readers eager for his tales of exotic places and situations. However, in 1851, with the publication of Moby Dick, Melville's popularity started to diminish. Moby Dick, on one level the saga of the hunt for the great white whale, was also a heavily symbolic allegory of the heroic struggle of humanity against the universe. The public was not ready for Melville's literary metamorphosis from romantic adventure to philosophical symbolism. It is ironic that the novel that served to diminish Melville's popularity during his lifetime is the one for which he is best known today.
4. The word "basis" in paragraph 1 is closest in meaning to: 

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The Colosseum was constructed over a short decade, between 70-80 AD, by up to  100,000 slaves. Its building was overseen by different emperors who ruled under the Imperial Flavian dynasty, lending the structure its original name. Emperor Vespasian began the construction of the Flavian Amphitheater and his son Titus oversaw the construction of an additional tier after his death in 79 AD. His youngest son Domitian constructed the underground tunnels and added an extra level to increase its seating capacity. The amphitheater takes its more commonly attributed name from the Colossus of Nero, an enormous bronze statue of the Emperor which was located beside the structure.  The Colosseum was a recreational and gathering space that was used for gladiatorial contests, public spectacles, historical re-enactments, mythological theatrical performances and of course, executions. It could hold between 50,000 to 80,000 spectators and the seating arrangements reflect the stratification of Roman society: senators were seated closest to the stage while the poorest Roman citizens (and women) stood at the highest level. Its skilled architects developed an ingenious design which included 80 entrances and exits with a numbering system to allow access in and out of the structure. Unlike most ancient amphitheaters which were built into hillsides for support, the Colosseum is so impressive because it is a freestanding structure: it is made of travertine stone that was sourced from the nearby Tivoli area and held together with iron clamps.  The Colosseum is most closely associated with its gladiatorial shows, although often the combatants were not skilled professionals but rather unlucky slaves and criminals pitted against each other for the enjoyment of the public. In fact the venatio, or animal hunt, was one of the most popular shows for its novelty and shock appeal. Always in pursuit of ostentatious displays of wealth and power, the Romans procured exotic animals such as elephants, giraffes, lions, bears and crocodiles from the far reaches of the empire and sent them out into the pit, often along with unfortunate souls who would be torn to pieces. During the inaugural games of the Colosseum, most likely held in 80 AD, over 9,000 animals are believed to have been killed. The Romans also constructed elaborate stage sets on the arena floor, simulating forests and other natural environments, as backdrops to the events taking place. 
2. The word “tier” in paragraph 1 can be replaced by_______

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Hamams, or bath houses, are a traditional part of Turkish culture. They represent an important piece of Turkey’s long history and serve as a window into the past. However, these bath houses are quickly disappearing because of the changing habits of the Turkish people. Hamams hold a strong place in the history of Turkey and many date back hundreds of years. Traditionally, all kinds of people went to hamams because Islam has strict laws for cleanliness. Believers must wash themselves regularly, particularly before their daily prayers. As most people in Turkey didn’t have access to running water in their homes, the hamam was the perfect to get clean, relax, and catch up with friends. Today, however, the tradition of going to the humam is quickly dying out for many young people. Now almost everyone has running water in their bathrooms, so they prefer to bathe at home. As a result, Turkish people are not going to humans as often as they used to. These days, instead of relying on locals, many hamams are trying to attract foreign tourists. Some of the best hamams in Turkey are located in Istanbul, the country’s largest city. The Cagaloglu hamam is a great example. It was a gift to the people from the Sultan in 1741 and is one of the last old hamams to be built during the Ottoman Empire. Many visitors are impressed by the high domed ceilings, marble floors, and marble walls used throughout. A typical session at a hamam can last well over an hour. Visitors will be welcomed into camekan, or entrance hall. There they will be able to relax with friends and chat over a cup of tea. They will also be able to change into the customary pestemal, or Turkish towel, which wraps around the waist like a skirt. When ready, visitors will head into the hararet, or hot room. There they will lie on the hot floor and be scrubbed clean and massaged by one of the in-house masseurs or masseuses. Men and women always bathe separately, but their experience are very similar. Although many hamams are in danger of closing, they will always remain a part of Turkish culture. An experience in one of Istanbul’s famous bath houses is not to be misses on any visit to Turkey. It will certainly leave you refreshed, relaxed, and squeaky clean for your next adventure
7. Which of the following is true about hamams?

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A new method for analyzing DNA collected from waterways which can help identify endangered bird species has been developed with the help of researchers from The University of Western Australia. The DNA analysis method developed also with researchers from Charles Darwin University and the Northern Territory’s Department of Environment and Natural Resources provides a new way of understanding the distribution of endangered birds by analyzing DNA collected in the waterways where they drink. The research, which will be published in Endangered Species Research Journal, offers new possibilities to support conservation efforts and increase understanding of birds that are scarce and otherwise hard to capture data on. The team developed a probe to locate DNA in water samples of the critically endangered Gouldian Finch (Erythrura gouldiae), a rainbowcolored grassfinch endemic to the savanna woodlands of northern Australia. UWA Professor Simon Jarman from the School of Biological Sciences said the researchers thought it would be hard to detect bird DNA in tropical conditions where the rate of DNA breakdown was high. “We were also sampling from pools where the water was not flowing and there was a lot of sediment and algal and bacterial growth,” Professor Jarman said. “However we were really pleased to get reliable bird detections from our methods showing DNA can be used to detect many species from the poles to the equator.” Professor Jarman said the Gouldian Finch was a beautiful and iconic species that was endangered due to habitat loss from being hunted extensively. "The DNA method will help to map where the finches are currently found with great accuracy, which will help persuade people to conserve the areas where they live," he said.  
1. Which best serves as the title for the passage?

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According to the American Red Cross, there’s a 97% chance that someone you know will need a blood transfusion. Blood donors — especially donors with certain blood types — are always in demand. To donate blood, the American Red Cross requires that people be at least 17 years old and weigh more than 110 pounds. (In some states, the age is 16 with a parent’s permission.) Donors must be in good health and will be screened for certain medical conditions, such as anemia. Donors who meet these requirements can give blood every 56 days. Blood donation starts before you walk in the door of the blood bank. Eat a normal breakfast or lunch — this is not a good time to skip meals — but stay away from fatty foods like burgers or fries. And be sure to drink plenty of water, milk, or other liquids. Before donating, you’ll need to answer some questions about your medical history, and have your temperature, pulse, blood pressure, and blood count checked. The medical history includes questions that help blood bank staff decide if a person is healthy enough to donate blood. They’ll probably ask about any recent travel, infections, medicines, and health problems. Donated blood gets tested for viruses, including HIV (the virus that causes AIDS), hepatitis B, hepatitis C, syphilis, and West Nile virus. If any of these things are found, the blood is destroyed. Because blood can be infected with bacteria as well as viruses, certain blood components are tested for contamination with bacteria as well.  Are there any risks? A person can’t get an infection or disease from giving blood. The needles and other equipment used are sterile and they’re used only on one person and then thrown away. The U.S. Food and Drug Administration (FDA) regulates U.S. blood banks. All blood centers must pass regular inspections in order to keep operating. Sometimes people who donate blood notice a few minor side effects like nausea, lightheadedness, dizziness, or fainting, but these symptoms usually go away quickly. The donor’s body usually replaces the liquid part of blood (plasma) within 72 hours after giving blood. It generally takes about 4–8 weeks to regenerate the red blood cells lost during a blood donation. An iron-fortified diet plus daily iron tablets can help rebuild a donor’s red blood supply. The Red Cross estimates that 15% of all blood donors in the United States are high school or college students — an impressive number when you consider you have to be 16 or 17 to donate blood. If you are eligible and want to donate blood, contact your local blood bank or the American Red Cross for more information on what’s involved. You could save someone’s life.  
3. According to the passage, which sentence is TRUE about blood donation?