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We couldn't hear anything because of the ____ noise of the drums the next-door neighbours were playing.

 

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Certainly no creature in the sea is odder than the common sea cucumber. All living creature, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that, among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets? For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to such up mud or sand and digest whatever nutrients are present. Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-color and nearly white. One form even has vivid purple tentacle. Usually the creatures are cucumber-shaped-hence their name-and because they are typically rock inhabitants, this shape, combine with flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents. Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become quiescent and live at a low metabolic rate-feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence. But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs, when attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attached or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted.
7. What can be inferred about the defense mechanisms of the sea cucumber?

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 It is reported that about 7 billion dollars is spent each year to treat the diseases related to be overweight

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Anna Gomez is a successful TV sports presenter, but most people still think of her as the famous women’s ice-skating champion who won several important competitions when she was younger. “As a child, my dream was actually to become a ballet dancer – I didn’t own any skates until I was nine, and didn’t become really keen on skating until I was fourteen,” says Anna. She went on to university, where, despite ice-skating almost all the time, she left with an excellent degree. “I felt I owed it to my parents. They supported me through university, and expected me to do well there – I didn’t feel I could disappoint them.” In a sport where most stars become famous as teenagers, Anna was unusual in being in her twenties before she won any major titles. “When I was younger, I got very angry at competitions, shouting at judges if I disagreed with them. That made me unpopular, especially with other skaters. My technique was just as good as theirs and I had a very encouraging coach at the time. The problem was in my head – I just didn’t think I had what it takes to be a champion. That changed as I won more competitions, and I was performing at my best by the age of twenty-five.” Anna retired from professional ice-skating five years later, having accomplished great success during that period. “It was a difficult decision. As you get near the end of your career, people always ask when you’re going to stop. At the time, I wasn’t sure that I was actually ready to give up. But, looking back, I’m glad I stopped when I did. You shouldn’t think too much about the past – just move on to the next thing.”  
1. What is the writer doing in the text?

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Once restricted to luxury or super-tech buildings, home automation is proving to be an increasingly fundamental and affordable addition to architectural projects. The idea is to connect devices, which in turn connect and talk through a centralized control unit, accessible by computers, tablets, and mobile phones. For example, home automation users can turn the lights on or off at specific times each day, adjust the heater or air conditioner to turn on a few minutes before they arrive home. In addition to these immediate effects, monitoring applications can also provide accurate home information by generating detailed reports on equipment that could be working better or spending less. That is, in addition to smartphones and personal computers, appliances and sensors are able to identify patterns, process information, and perform tasks both through commands and automatically. Although it sounds like a science fiction script, these are technologies that are not so far from us.  Artificial intelligence can be used to automate threat detection and perhaps more proactively alert us if something looks wrong, such as heat sensors and video cameras setting off alarms and calling firefighters in the event of a short circuit. Through facial recognition algorithms on social media, the system itself can tell if someone outside your circle of acquaintances is trying to access your space and send a message to your mobile phone. This type of technology can improve the efficiency of security systems and reduce false alarms. Automation can be useful for people with disabilities and for the elderly. People with Parkinson’s disease or other motor diseases can trigger switches without touching them, and motion sensors can trigger safety lights automatically. Blood pressure sensors and blood sugar levels can be incorporated into these systems, providing peace of mind to close relatives. The ability to automate repetitive housekeeping can free time for more important things. For example, an internet-connected refrigerator can check for missing items and make purchases online. It is important to mention that these systems must be highly protected, as a single attempt to break into this centralized system can lead to the invasion of privacy and the loss of valuable confidential information. Still, most people who have experienced life in an automated space will likely be uncomfortable returning to traditional systems  
8. The passage implies that ______

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The print media includes newspapers, magazines, brochures, newsletters, books and even leaflets and pamphlets. Visual media like photography can also be mentioned under this sub-head, since photography is an important mass media, which communicates via visual representations. Although it is said that the electronic or new media have replaced the print media, there exists a majority of audiences who prefer the print media for various communication purposes. Public speaking and event organizing can also be considered as a form of mass media. For many people, it is impossible to imagine a life without their television sets, be it the daily news dose or even the soap operas. This mass media includes television and radio. This category also included electronic media like movies, CDs and DVDs as well as the new hottest electronic gadgets.  With the advent of new technologies like Internet, we are now enjoying the benefits of high technology mass media, which is not only faster than the old-school mass media, but also has a widespread range. Mobile phones, computers and Internet are often referred to as the new-age media. Internet has opened up several new opportunities for mass communication which include email, websites, blogging, Internet television and many other mass media which are booming today. Mass media was developed as a means of social responsibility at the beginning. However, in the course of time, they have attained the status of an industry. Besides the social and industrial nature of mass media, the following common points may also be mentioned. Specifically, it is highly impersonal, because the masses are not identifiable based on perfectly defined audio, visual or written messages. In addition, it is never likely to reach 100 percent of the target nor to have more than 10 percent effectiveness in most of the cases. Contents are generally based on the broad social issues and aspiration of the target audience which may be designed to achieve some specific goals; and all in all, modern mass media draw heavily on technology  
3. Which of the following is mentioned as a favourite TV programme?

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Though it was writing for children, Alice in Wonderland appeals to many adult readers

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Would you believe that your diet can make a big difference in keeping a youthful appearance? It seems strange to think that the food we take in could result in fewer wrinkles. Wouldn’t it be better to put things on our skin rather than in our mouths? Well, according to one scientific theory, our bodies start aging because of oxidation. This is caused by certain oxygen-containing molecules in our cells, called free radicals. Free radicals have the capability to attach to and damage parts of our cells, including our DNA. Our bodies have the ability to repair this damage. However, as we get older, these repair mechanisms start to break down, resulting in signs of aging, such as wrinkles. Free radicals are actually produced by our bodies, but their numbers can also increase because of the food we eat. Besides avoiding foods that could potentially produce more free radicals, eating foods that contain certain vitamins and micro-nutrients can also keep us looking young. These vitamins help produce molecules called antioxidants, which actually help reduce the production of free radicals. Even better, foods containing antioxidants are not rare. Common antioxidants, like vitamins A and E, can be found in many dark-colored vegetables. For example, carrots, seaweed, spinach, and broccoli are all excellent sources of these helpful vitamins. Also, you can eat orange-colored fruits like apricots and peaches. Vitamins A and E are particularly good for helping your skin remain young-looking. These nutrients strengthen your skin and make it soft. However, if you really want to stock up quickly on nutrients that benefit your skin, you should eat cow’s liver. One small piece of cooked cow’s liver contains twice as much vitamin A as half a cup of cooked carrots.  More recently, green tea has also been tentatively added to the list of youthpromoting substances. Research on green tea’s effects on our bodies is still in the early stages. Scientists certainly believe that it is good for us, but they are cautious about predicting its ability to keep us looking youthful. However, recent experiments seem to show that green tea’s antioxidant properties can repair cell damage already sustained as well as prevent damage in the future. In fact, green tea works even better if you apply it directly to your skin as an ingredient in facial cream. “You are what you eat.” The more we find out about how our bodies work, the more this old proverb seems to be true. Think about that the next time you sit down at the table.  
7. The word “tentatively” in paragraph 4 is closest in meaning to ___________

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Perfectly smart adults feel intimidated by numbers and aren’t ashamed to say, “I hate math.” The new book “Math Art” could help change that by making the dreaded topic relevant and accessible to naturalists, artsy types, the philosophically inclined, and committed calculators alike. It illuminates an old lesson your math teachers probably tried to convey when you were a kid: Math dominates our lives even while we try with all our might to ignore it. In Math Art, released in April, science writer Ornes examines creative works inspired by math. It’s an aesthetically pleasing book with a delightfully tactile cover and satisfyingly thick and glossy pages that make it as fun to flip through as a fashion magazine. Chapters are dedicated to different concepts like pi, the golden ratio, equations in nature, and hyperbolic geometry. All of which may sound scary to the uninitiated but gain appeal when illustrated through sculpture, crochet, and painting. As Ornes explains in the introduction, math art isn’t new. Since ancient times, humans have visualized math in creative works. He argues that what is new is the mutual recognition that mathematicians and artists now show each other, increasingly gathering together at events dedicated to the intersection of aesthetics and numbers. “This is art by way of math and math by way of art, beauty at the crossroads,” Ornes writes.  His exploration begins with pi, the irrational mathematical constant 3.14159, plus some, ad infinitum. Pi, the ratio of the circumference of a circle to its diameter, represents mystery itself. Because the sequence never repeats, pi hints at the vastness of the universe. “It speaks to a world without bounds, since its digits go on forever,” Ornes explains. Pi is used for calculations in math and physics, and employed by math artist John Sims to make music, videos, drawings, paintings, quilts, clothing, and stories. Sims created and taught a math curriculum for students at the Ringling College of Art and Design in Sarasota, Florida, and has spent much of his career at the intersection of math and creativity. In Ornes’ book, he explains how he’s also used this fascination to connect with other people he might not otherwise meet, such as the Amish quilters who joined him to make pi quilts with each colored panel representing a number in the mathematical sequence.  
2. The word “illuminates” in paragraph 1 is closest in meaning to _______

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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.  
4. The word “that” in paragraph 3 refers to _____________

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The town of Chichen-Itza was established during the Classic period close to two natural cavities (cenotes or chenes), which gave the town its name “At the edge of the well of the Itzaes”. The cenotes facilitated tapping the underground waters of the area. The dates for this settlement vary according to subsequent local accounts: one manuscript gives 415-35 A.D., while others mention 455 A.D. The town that grew up around the sector known as Chichen Viejo already boasted important monuments of great interest: the Nunnery, the Church, Akab Dzib, Chichan Chob, the Temple of the Panels and the Temple of the Deer. They were constructed between the 6th and the 10th centuries in the characteristic Maya style then popular both in the northern and southern areas of the Puuc hills. The second settlement of Chichen-Itza, and the most important for historians, corresponded to the migration of Toltec warriors from the Mexican plateau towards the south during the 10th century. According to the most common version, the King of Tula, Ce Acatl Topiltzin Quetzalcoatl, or Kukulkan as the Maya translated the name, reportedly took the city between 967 A.D. and 987 A.D. Following the conquest of Yucatán a new style blending the Maya and Toltec traditions developed, symbolizing the phenomenon of acculturation. Chichen-Itza is a clear illustration of this fusion. Specific examples are, in the group of buildings to the south, the Caracol, a circular stellar observatory whose spiral staircase accounts for its name, and, to the north, El Castillo. Surrounding El Castillo are terraces where the major monumental complexes were built: on the north-west are the Great Ball Court, Tzompantli or the Skull Wall, the temple known as the Jaguar Temple, and the House of Eagles; on the north-east are the Temple of the Warriors, the Group of the Thousand Columns, the Market and the Great Ball Court; on the south-west is the Tomb of the High Priest. After the 13th century no major monuments seem to have been constructed at Chichen-Itza and the city rapidly declined after around 1440 A.D. From its abandonment during the 15th century, Chichen-Itza underwent a process of gradual deterioration until the first excavations at the site began more than a century ago. Nevertheless, the excellent materials and building techniques used by the Maya in the construction of the buildings secured that the architectonic, sculptural and pictorial essence of Chichen-Itza would be conserved through the centuries  
1. Which best serves as the title for the passage?

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Nuclear family, also called elementary family, in sociology and anthropology, is a group of people who are united by ties of partnership and parenthood and consisting of a pair of adults and their socially recognized children. Typically, but not always, the adults in a nuclear family are married. Although such couples are most often a man and a woman, the definition of the nuclear family has expanded with the advent of same-sex marriage. Children in a nuclear family may be the couple’s biological or adopted offspring.  Thus defined, the nuclear family was once widely held to be the most basic and universal form of social organization. Anthropological research, however, has illuminated so much variability of this form that it is safer to assume that what is universal is a “nuclear family complex” in which the roles of husband, wife, mother, father, son, daughter, brother, and sister are embodied by people whose biological relationships do not necessarily conform to the Western definitions of these terms. In matrilineal societies, for example, a child may be the responsibility not of his biological genitor but of his mother’s brother, who fulfills the roles typical of Western fatherhood.  Closely related in form to the predominant nuclear-family unit are the conjugal family and the consanguineal family. As its name implies, the conjugal family is knit together primarily by the marriage tie and consists of mother, father, their children, and some close relatives. The consanguineal family, on the other hand, typically groups itself around a unlineal descent group known as a lineage, a form that reckons kinship through either the father’s or the mother’s line but not both. Whether a culture is patrilineal or matrilineal, a consanguineal family comprises lineage relatives and consists of parents, their children, and their children’s. Rules regarding lineage exogamy are common in these groups; within a given community, marriages thus create cross-cutting social and political ties between lineages.  The stability of the conjugal family depends on the quality of the marriage of the husband and wife, a relationship that is more emphasized in the kinds of industrialized, highly mobile societies that frequently demand that people reside away from their kin groups. The consanguineal family derives its stability from its corporate nature and its permanence, as its relationships emphasize the perpetuation of the line.
4. In which societies, a father may not be the one taking responsibility for his child?

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Culture has a strong influence on non–verbal communication. Even the simple act of looking someone in the eye is not at all that simple. In the USA, Americans are (1) ______ to look directly at people when speaking to them. It shows interest in what they are saying and is thought to carry a (2) ______ of honesty. Meanwhile, in Japan and Korea, people avoid long periods of eye contact. It is considered more polite to look to the side during a conversation. The Lebanese, (3) ______, stand close together and look intensely into each other's eyes. The action shows sincerity and gives people a better sense of what their counterparts want. Given such differences with even the most common expressions, people (4) ______ travel or work abroad have a real need to learn the other culture's body language. People tend to be unaware of the messages they are sending to others. So, it is (5) ______ to consider your own body language before dealing with people from other cultures. Knowing about the body language of friends, clients, and colleagues can be very helpful in improving understanding and avoiding miscommunication.

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Nuts could be the key to keeping slim, according to new research. Scientists from Harvard University and Harvard Medical School say that replacing and unhealthy snack with half a daily _____ (1) of nuts could slow weight gain in people as they get older. Walnuts ____________ (2) particular appeared to offer good results and were linked to a 15% lower risk of obesity. Researchers conducted a long-term study which followed 51,529 male health professionals aged 40 to 5, 121,700 nurses aged 35 to 55 and 16,686 nurses aged 24 to 44. Participants had their weight ____________ (3) every four years and were asked how often they had eaten nuts. They also had to report their exercise every two years. The findings, ___________________ (4) in the online journal BMJ Nutrition, Prevention and Health, showed that increasing nut consumption was associated with less risk of putting on two or more kilos over a four-year period. However, the researchers say the study is ________ (5) and therefore cannot establish a definite cause

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If you want to spend your time effectively, you can try the following tips. First, make a to-do list every day. Put the most important tasks at the top, even if  they’re things you’re dreading, and tackle them first. Include things you want to do on your list too, so you have items you’re looking forward to. Try motivating yourself with a reward if you get to everything on your list.  Once you know what you need to do, keep your work with you. That way, if you find yourself with extra time – while in the train or bus or waiting for an appointment – you can get something done.  Additionally, don’t be afraid to say no. It’s OK to say no if your friend asks you to go to a movie one night but you have a test the next morning. Instead, find a time that works for both of you and go to see the movie then.  Managing your time also includes finding you productive time. Are you a morning person or a night person? You’ll be more efficient of you work when you’re at your best.  Last but not least, create a dedicated study time. Set up a time devoted only to studying or homework. Shut off you phone and respond to calls or texts when your work is finished. Don’t check email or surf the web (except when you need to for the work you’re doing) during this time either. 
2. Which of the following best replaces the word “extra”?

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Advertising helps people recognize a particular brand, persuades them to try it, and tries to keep them loyal to it. Brand loyalty is perhaps the most important goal of consumer advertising. Whether they produce cars, canned foods or cosmetics, manufacturers want their customers to make repeated purchases. [2] The quality of the product will encourage this, of course, but so, too, will affect advertising. Advertising relies on the techniques of market research to identify potential users of a product. [3] Are they homemakers or professional people? Are they young or old? Are they city dwellers or country dwellers? Such questions have a bearing on where and when ads should be placed. By studying readership breakdowns for newspapers and magazines as well as television ratings and other statistics, an advertising agency can decide on the best way of reaching potential buyers. Detailed research and marketing expertise are essential today when advertising budgets can run into thousands of millions of dollars. [4] Advertising is a fast-paced, high-pressure industry. There is a constant need for creative ideas that will establish a personality for a product in the public’s mind. Current developments in advertising increase the need for talented workers. In the past, the majority of advertising was aimed at the traditional white family - breadwinner father, non-working mother, and two children. Research now reveals that only about 6 percent of American households fit this stereotype. Instead, society is fragmented into many groups, with working mothers, single people and older people on the rise. To be most successful, advertising must identify a particular segment and aim its message toward that group. Advertising is also making use of new technologies. Computer graphics are used to grab the attention of consumers and to help them see products in a new light. The use of computer graphics in a commercial for canned goods, for instance, gave a new image to the tin can  
4. According to paragraph 2, market research includes __________

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Taking piano lessons and solving math puzzles on a computer significantly improve specific math skills of elementary schoolchildren, according to a new study. The results, (1)______ were published in the journal Neurological Research, are the latest in a series that links musical training to the development of higher brain functions. Researchers worked with 135 second-grade students at a school in Los Angeles after (2)______ a pilot study with 102 students. Children that were given four months of piano training as well as time playing (3)______ newly designed computer software scored 27 percent higher on math and fraction tests than other children. Piano instruction is thought to enhance the brain's "hard wiring" for spatial-temporal reasoning, or the ability to visualise and transform objects in space and time, says Professor Gordon Shaw, who led the study. At the same time, the computer game allows children to solve geometric and math puzzles that boost their ability to (4)______ shapes in their mind. The findings are significant (5)______ a grasp of proportional math and fractions is a prerequisite to math at higher levels, and children who do not master these areas of math cannot understand more advanced math that is critical to high-tech fields.

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England has had a democracy for a long time. Until 1918, however, women were not allowed to vote in it. The right to vote is called ‘suffrage’ and the English women who fought (1) ____ and won that right were called “suffragettes”. The suffragette movement was led by Emmiline Pankhurst. In 1903, she founded an organization called the Women’s Social and Politica Union (WSPU). Members of the WSPU went to the Prime Minister to (2) ____ suffrage, but he told them to “be patient”. The suffragettes were not (3) ____.They wanted change immediately. The fight for the vote for women became intense and sometimes violent. In 1908, two suffragettes (4) ____ themselves to the fence outside the Prime Minister’s front door! They were arrested and spent weeks in jail. In 1912, hundreds of women took to the streets of London. They broke shop windows and even threw Stones at the Prime Minister’s house. Thousands of suffragettes were jailed for this and similar actions over the years. World War I (1914-1918) proved to be an important event for the women’s movement. Women contributed so much to the war effort as nurses’, factory workers, and at other jobs that more people became convinced of their right to vote. Women were (5) ____ given that right in January, 1918

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Ask about “the population problem” to people of a certain age, and the first and perhaps only thing that comes to mind is the “population bomb” or “population explosion.” And they would be right - for their time. In the second half of the 20th century, rapid population growth - especially but not exclusively in the developing countries - created unprecedented increases in the number of people on the earth. And this growth was accompanied by crowding, malnutrition, disease, and poverty. Indeed, for many Americans, the coming “population explosion” was, along with the Cold War, the most unsettling fact about our world. But “population problems” have been part of American discourse for over 100 years. In the 1930s and 1940s, for instance, many observers feared that depopulation due to plummeting birth rates would cause chronic economic depression as the numbers of U.S. consumers and workers declined. In the 1920s, the U.S. “population problem” was rapid urbanization, reflected in a 1920 census count showing that for the first time more than onehalf the population lived in urban areas. Rural incumbents in the House of Representatives, fearing they would be voted out of office by their new urban constituents, succeeded in blocking reapportionment of the House’s seats on the basis of the census counts as mandated by the U.S. Constitution. The century’s first “population problem” was mass xenophobia about immigration. Beginning in 1880, wave after wave of European immigrants was creating congestion and social change at an unprecedented rate. In response to widespread anxiety and anger, Congress in 1924 passed the country’s most restrictive immigration legislation ever. Each problem was based in hard numbers. Each generated private emotions and public fears. Each suffered exaggeration and manipulation. And each commanded the attention of opinion leaders and elected officials.  
5. The word “unprecedented” in paragraph 3 refers to _______

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Most of the roughly 1,400 active volcanoes around the world, including many in the  United States, do not have on-site observatories. Lacking ground-level data, scientists are turning to satellites to keep tabs on volcanoes from space. Now using artificial intelligence, scientists have created a new satellite-based method of detecting warning signs of when a volcano is likely to erupt.  Every time one of the satellites passes over a given volcano, it can capture an InSAR image of the volcano from which ground movement away from or toward the satellite can be calculated.  InSAR can often pick up the ominous expansion of the ground that occurs when magma moves within a volcano’s plumbing, but it is difficult to continuously monitor the huge number of images produced by the latest generation of SAR-equipped satellites. In addition, some volcanoes exhibit long-lasting deformation that poses no immediate threat, and new images must be compared with older ones to determine whether a deformation at a volcano is a warning sign or just business as usual. To solve these issues, the researchers turned to machine learning, a form of artificial intelligence that can glean subtle patterns in vast quantities of data. They developed an algorithm that can rapidly analyze InSAR data, compare current deformation to past activity, and automatically create an alert when a volcano’s unrest may be cause for concern.  To test the algorithm’s viability, the team applied it to real data from the period leading up to the 2018 eruption of Sierra Negra, a volcano in the Galápagos Islands. The algorithm worked, flagging an increase in the ground’s inflation that began about a year before the eruption. Had the method been available at the time, the team writes, it would have accurately alerted researchers that Sierra Negra was likely to erupt.
4. What is the method of paragraph development being employed in paragraph 3?