Read the following passage and choose the best answer (A, B, C, D):
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. 
3. According to the passage, dating with friends also means ___________________

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That’s all well and good, but if a potential new friend doesn’t see the same joyous  charms in you, it’s (1)_________that anything deep and lasting will come of it. That said, there’s no telling when and where a friendship will develop. Often, they arise from a shared interest or hobby, and people are typically drawn together (2)________ they’re in the same stage of life, like new parents or retirees. People of similar backgrounds and cultures also tend to come together by bonding (3)______ shared lifelong experiences. Although most of these relationships take time to get really deep, occasionally friendship is more like a lightning (4) __________. “Sometimes you can be in a big group of new people and you catch someone’s eye and it’s like ‘boom!’ – instant friendship,” Degges-White says about an experience she’s termed the “clicking phenomenon.” “It’s kind of like that burst of ‘love at first sight,’ but it’s a friendship, not (5)_________ .”

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It’s extremely important for kids of middle childhood to continue, or to start to lead a healthy lifestyle, including eating nutritious meals as well as getting plenty of exercise and adequate sleep every day. These positive health habits will help children grow strong, stay healthy, and decrease the likelihood that they will become obese. Childhood obesity rates have increasing dramatically in recent years. According to the Centers for Disease Control, in 2004, 18.8% of school-aged children were obese, versus 4% of children 30 years before in 1974. Children’s skyrocketing rate of obesity is worrisome because it greatly increases children’s risk for remaining obese in adulthood, which in turn raises their risk for heart disease, stroke, cancer, diabetes, and premature death as adults. Obese children may also develop associated health problems during the middle childhood stage, such as high blood pressure, high cholesterol levels, and respiratory problems. Obesity can also set the stage for problems with self esteem, depression, anxiety and social ostracism, and/or being victimized by bullies Healthy diet and adequate exercise are important in preventing Type II diabetes in childhood as well as obesity. Diabetes is a metabolic disease in which the body cannot properly metabolize the sugars from food. Because the body cannot metabolize sugars, the sugars accumulate in the bloodstream instead and ultimately stress children’s kidneys, heart, circulatory system, and eyes. Insulin, which is created in the pancreas, is the chemical that breaks down blood sugar. In Type II diabetes, the body does not produce enough insulin to deal with all the sugars coming into the body. This medical diagnosis used to be called “adult-onset diabetes” because the disorder primarily affected adults with poor eating and activity habits. Today, however, this illness is now diagnosed in America’s children far more than in adults. It is now referred to as “Type II diabetes”, to reflect this shift in prevalence. In contrast to the many youth in America who overeat and don’t get enough exercise, other children become obsessed with over-controlling their food intake and with exercising too much. With the constant barrage of perfect, photoshopped bodies in the media today, many children are feeling pressure at younger and younger ages to imitate those images. Children as young as 6 are reporting that they are trying to lose weight by dieting. Overemphasis on extreme thinness can put children at risk for poor self-esteem, unhealthy exercise patterns, and eating disorders such as anorexia and bulimia. Children who embrace healthy eating and exercise habits during middle childhood will have a much easier time maintaining a healthy lifestyle through adolescence and adulthood than individuals who try to make the shift later in life. Teaching children to habitually eat moderate portion sizes and to choose healthy foods in preference to junk foods becomes increasingly important as children begin to spend more time away from home and gain more independence over their food and activity choices. Even though parents have less control over their children’s eating habits during middle childhood than when children were younger, it remains vital that parents continue to reinforce children’s healthy habits whenever possible. 
2. What does it mean by the word “skyrocketing” in paragraph 2?

Most Americans still get married at some point in their lives, but even that group is shrinking. Among current generations of adult American - starting with those bom in 1920s - more than 90 percent have married or will marry at some point in their lives. However, based on recent patterns of marriage and mortality, demographers calculate that a growing share of the younger generations are postponing marriage for so long that an unprecedented number will never marry at all.

More Americans are living together outside of marriage. Divorced and widowed people are waiting longer to remarry. An increasing number of single women are raising children. Put these trends together with our increasing life expectancy, and the result is inevitable. Americans are spending a record low proportion of their adult lives married.

Married rates for unmarried men and women have dropped from their post-195Os high to record lows. Part of this fall is due to the change in the age at which people first marry. The median age at first marriage is the age by which half the men or women who will ever marry have done so. It fell almost continuously from the time it was first measured, in 1890, at 22.0 years for women and 26.1 for men, to a low of 20.3 for women and 22.6 for men between 1947 and 1962. Since then, it has risen at a rapid pace, to a record high for 23.8 for women and 26.2 for men in 1994.

The length of time between marriages is also increasing, and more divorced people are choosing not to remarry. In 1990, divorced men had waited an average of 3.8 years before remarrying, and divorced women had waited an average of 3.5 years, an increase of more than one year over the average interval in 1970.

Data on cohabitation and unmarried childbearing suggest that marriage is becoming less relevant to Americans. 2.8 million of the nation's households are unmarried couples, and one-third of them are caring for children, according to the Census Bureau.

Between 1890 and the 1950s, the age at which men first married    

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Stories about how people (1)__________ know when they are being watched have  been going around for years. However, few made have been made to investigate the phenomenon scientifically. Now, with the completion of the largest ever study of the socalled staring effect, there is impressive evidence that this is a recognizable and (2) _______ sixth sense. The study involved hundreds of children. For the experiments, they sat with their eyes covered and with their backs to other children, who were told to either stare at them or look away. The results consistently showed that the children who could not see were able to (3) _______ when they were being stared at. In a total of 18,000 trials carried out worldwide, the children correctly sensed when they were being watched almost 70% of the time. The experiment was repeated with the added precaution of putting the children who were being watched outside the room, (4) _______ from the starters by the windows. The results, though less impressive, were more or less the same. Dr. Sheldrake, the biologist who designed the study, believes that the results are (5) _______ enough to find out through further experiments precisely how the staring effect might actually come about

Choose the best answer:
Reducing the size of classes may improve _______ standards.

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All living things require energy to do the work necessary for survival and  reproduction. But what is energy? Energy is simply the ability to do work, (1) ____ work is  done when a force moves an object. Let’s consider your own needs for a moment. You need energy to turn on and turn off your computer. You need energy to (2) ____ of bed in the morning. And, yes, you need energy to reproduce. So where does energy come from and how do we use it? On Earth, energy ultimately comes from the sun. Plants use the sun’s energy to make sugar. Organisms, in turn, use sugar as a (3) ____ of energy to do work.  Plants use energy from sunlight to make sugar and oxygen from carbon dioxide and water. The process by which carbon dioxide and water are (4) ____ to sugar and oxygen using sunlight is referred to as photosynthesis. This is an endergonic reaction, meaning energy is required by the reaction. Specifically, energy is required to put the carbon dioxide and the water molecules together to form sugar. Sun (5) ____ the energy needed to drive photosynthesis, and some of the energy used to make the sugar is stored in the sugar molecule

Choose the best answer:
The second/ priority/ train/ young people/ job application skills.

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 following questions:
In the United States, presidential elections are held in years evenly divisible by four (1888, 1900, 1964, etc.). Since 1840, American presidents elected in years ending with zero have died in office, with one exception. William H. Harrison, the man who served the shortest term, died of pneumonia only several weeks after his inauguration.
Abraham Lincoln was one of four presidents who were assassinated. He was elected in 1860, and his untimely death came just five years later. James Garfield, a former Union army general from Ohio, was shot during his first year in office (1881) by a man to whom he wouldn’t give a job. While in his second term of office (1901), William McKinley, another Ohioan, attended the Pan-American Exposition in Buffalo, New York. During the reception, he was assassinated while shaking hands with some of the guests. John F. Kennedy was assassinated in 1963 in Dallas only three years after his election.
Three years after his election in 1920, Warren G, Harding died in office. Although it was never proved, many believe he was poisoned. Franklin Roosevelt was elected four times (1932, 1936, 1940 and 1944), the only man to serve so long a term. He had contracted polio in 1921 and eventually died of the illness in 1945.
Ronald Reagan, who was elected in 1980 and reelected four years later, suffered an assassination attempt but did not succumb to the assassin’s bullets. He was the first to break the long chain of unfortunate events. Will the candidate in the election of 2020 also be as lucky?

All of the following presidents were assassinated EXCEPT     .

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Hardly a week goes by without some advance in technology that would have seemed  incredible 50 years ago. And we can expect the rate of change to accelerate rather than slow down within our lifetime. The developments in technology are bound to have a dramatic effect on the future of work. By 2010, new technology will have revolutionized communications. People will be transmitting messages down telephone lines that previously would have been sent by post. Not only postmen but also clerks and secretaries will vanish in a paper-free society. All the routine tasks they perform. will be carried on a tiny silicon chip so that they will be as obsolete as the horse and cart after the invention of the motor car. one change will make thousands, if not millions, redundant.  Even people in traditional professions, where expert knowledge has been the key, are unlikely to escape the effects of new technology. Instead of going to a solicitor, you might go to a computer which is programmed with all the most up-to-date legal information. Doctors, too, will find that an electronic competitor will be able to carry out a much quicker and more accurate diagnosis and recommend more efficient courses of treatment. In education, teachers will be largely replaced by teaching machines far more knowledgeable than any human being. Most learning will take place in the home via video conferencing. Children will still go to school though, until another place is created where they can make friends and develop social skills.  What can we do to avoid the threat of unemployment? We shouldn’t hide our heads in the sand. Unions will try to stop change but they will be fighting a losing battle. People should get computer literate as this just might save them from professional extinction. After all, there will be a few jobs left in law, education and medicine for those few individuals who are capable of writing and programming the software of the future. Strangely enough, there will still be jobs like rubbish collection and cleaning as it is tough to programme tasks which are largely unpredictable.
1. According to the writer, the rate of change in technology______

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Rogue waves are extremely large waves that are more than double the average height of most waves. According to mathematical calculations and various personal accounts, rogue waves can reach remarkable heights. They appear unexpectedly in calm waters and can do major damage, even to large ships. Unlike tsunamis, which are practically undetectable in deep water, rogue waves only occur far out at sea. Stories about rogue waves have circulated amongst sailors for centuries, but it was not until recently that scientists confirmed they actually exist. What they still are not sure of, however, is what causes them. Some instances of rogue waves have been explained by the interactions of normal wave patterns with ocean currents. Scientists believe that it is possible for waves to reach the heights described when they come into contact with strong ocean currents. The wave heights increase significantly when a normal wave reaches a current head on. In other words, the wave is built up by the power of the current. This explanation was first proposed after scientists observed a high incidence of rogue waves in the ocean surrounding the southern tip of Africa. In fact, since 1990, at least twenty ships have encountered the waves, which reportedly reached up to 190 feet. The waves are thought to be caused by wave interactions with the strong Agulhas Current, which runs southbound along the east coast of the continent.  
7. The word "which" in the third paragraph refers to ____

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Mr O’Connor, a volunteer firefighter with the New South Wales Rural Fire Service (RFS), has used all seven weeks of his holiday leave, plus his three weeks of allotted sick leave, to fight fires across the state. Mr O’Connor is among the more than 72,000 members of the RFS, a volunteer force that is the largest firefighting service in the world. These volunteer services have been at the front line of the battle against ferocious bush fires across Australia that have already destroyed more than 10.7 million hectares, an area larger than South Korea. The RFS, which began 120 years ago, not only attends to bush fires and home and building fires but also assists in storms, search and rescue operations and car accidents. In 2018, it attended 26,903 incidents, including 10,036 bush fires and 1,283 building fires. Mr Mick Holton, president of the NSW Volunteer Fire Fighters Association, an organisation which represents volunteers, said people step up for various reasons, including altruism, social factors, a sense of adventure, or a desire to protect their own farms or houses. “People are happy to be part of a group that benefits the community. That is a large part of it for most volunteers. People have a sense that they want to help,” he told The Straits Times. But Australia’s bush fires are becoming more severe and more frequent. This year, many, like Mr O’Connor, have made large sacrifices to protect people and homes. Controversially, Prime Minister Scott Morrison agreed in late December to compensate some of the firefighters after coming under heavy pressure to provide them with support. The compensation scheme allows volunteers who are self-employed or work for small businesses to claim A$300 (S$277) per day if they have served more than 10 days this fire season. The maximum payment is A$6,000. But the move had been opposed by some senior firefighters, including the RFS Commissioner, Mr Shane Fitzsimmons, who has said that “For goodness sake, let’s not take away from the extraordinary spirit that is volunteerism.” But Mr Morrison insisted that: “While I know RFS volunteers don’t seek payment for their service, I don’t want to see volunteers or their families unable to pay bills or struggle financially as a result of the selfless contribution they are making.
3. The word “ferocious” in paragraph 1 is closest in meaning to _______

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Super Size Me is a 2004 film by Morgan Spurlock, in which he (1)____ his experiment to eat only McDonald’s fast food three times a day, every day, for thirty days. Spurlock made himself a short list of rules for the experiment, including an obligation to eat all of the three meals he ordered. He also had to ‘Super Size’, which means (2) ______ a giant portion every time the option was offered to him. He ended up vomiting after the first Super Size meal he finished, after taking nearly twenty minutes to consume it. After five days Spurlock put on almost 5kg, and he soon found himself feeling depressed, with no energy. The only thing that got rid of his headaches and made him feel better was another McDonald’s meal, so his doctors told him he was addicted. More seriously, around day twenty, he started experiencing heart (3)________ and one of the doctors detected liver problems. However, in spite of his doctor’s advice, Spurlock continued to the end of the month and achieved a total weight gain of 11kg. His body mass index also increased from a healthy 23.2 to an overweight 27. It took Spurlock fifteen months to recover (4)_______ his experiment and return to his original weight, but the film also had a wider impact. Just after its showing in 2004, McDonald’s phased out the Super Size option and healthier options like salads appeared on the menu. Unfortunately, McDonald’s denied the connection between the film and the changes, but it is interesting to note how closely they (5)________ with the release of the film

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When it comes to cooking, boomers cook one, Generation X cooks another way and the beat generation does things that must be recorded now, because once they have passed out of fashion, they will never be discovered again. They have weird skills, derived from scarcity in their early years. They keep their spices in brown glass because they last longer. For practical purposes, this means everything is in an old Calpol bottle with “sumac” scrawled over it. Some of them are, and will fish an empty packet of sugar out of the bin, shake a quarter-teaspoon of sugar from it and put it back. They can often make a cake by eye, without weighing anything, which I find incredible, and they know what to do with leaf gelatine, which is great until it isn’t. My mother once made avocado in jelly and then said: “I don’t know, the proportions may have been slightly off.” I said, recklessly: “Don’t worry – I’m sure I’ll choke it down,” but when it came to it, my cutlery bounced off it, like a prank played on a very hungry person in a cartoon. The beat generation canon is Meat at Any Price and Fish at Any and anything to do with mince. The descent of mince from a sacred food to a bolognese-only staple is one of the great mysteries of progress, because it is delicious even when you don’t shove a load of tomato in it. But you can’t just shove cheap meat in a pan and watch while it sweats out watery grey juice. This seems to be something that only wartime generations understand. Hip parents in the 70s, or regular parents in the 80s, or quite trad parents in the 90s had a horror of overcooked carrots and waterlogged cabbage. The very smell of cooked vegetables evoked for them every bad memory of British cuisine, before anchovies and Italians and radicchio arrived, when all dinner was a school dinner. So they would all just tease their vegetables with a hint of boiling water, before turning them out, still basically a salad, only a bit warmer. Then you, their offspring, would leave home, and accidentally encounter a vegetable that had been cooked, and realise how delicious it was and now you probably overcook your vegetables a bit, and your children will go the other way.  
6. The word “hint” in paragraph 4 is closest in meaning to _______

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The idea of life in (1) ____________ space has been talked about for a long time.  Some scientists say that life development on Earth was far too unlikely for it to have happened anywhere else. Things had to be perfect for us to make it on this planet. Other scientists say that space is too big. Stars and other planets are far too numerous for there to be no other life in the universe.   For many years, there have been reports of visitors from other planets. People all around the world have claimed to see alien spaceships or even aliens themselves. There have  been (2)________of these so-called UFOs (unidentified flying objects) flying through the air and they have even been captured on video. Some Americans believe that the U.S. Army found an alien spaceship crashed in the desert and then lied to the press about it. (3)________these sightings may be true, scientists have not found significant evidence that aliens exist.   If you go out into the countryside on a clear night and look up, you can see thousands of stars. Those stars (4)_____a tiny part of our unniverse. There are more stars, planets, and galaxies than we can count. Even the smartest scientists can’t even come close to defining how big space is. The number of possible stars and planets out there is bigger than our ability to count. If we are really on the only planet that can (5)_________life, then we are very special in a universe full of amazing things

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There are many thoughts on the origins of civilization. One of the major factors  involved was the increase in population. The development of techniques, primarily irrigation and food control, which permitted agriculture in special areas such as the flood plain of the Tigris and Euphrates rivers, made possible the support of large population. Once populations reach a certain number, the older pattern of social organization breaks down and new ones develop. Specifically the older system whereby each individual participated in food production and maintained a similar standard of living, and whereby kinship served as the basic method of social organization, was replaced by the occupational division of labor, political and religious hierarchies, public works such as road and public building construction, class systems, codes of law, markets, new forms of warfare, and urban centres. Allied with these important sociological traits are material traits, such as monumental architecture and development of science and, in many cases, metallurgy and writing systems.  The earliest civilization, Sumer, developed in the Middle East. This was the Bronze Age of the Old World, during which people first developed the art of metallurgy, civilization also arose in other parts of the Old World first in Egypt, China and India, and later in Europe and Africa. At this time, civilization also developed independently in the New World, in the Mexican area and in Peru and its neighboring areas.  In the Old World the Bronze Age was followed by the Iron Age, which saw the rise and fall of great empires and the shift of power from the Middle East to Greece and Rome and then to Western Europe. In the 1700s the Industrial Age began, leading directly to the modern civilization of today. 
5. Which of the following is NOT included in the expression “the Old World” used in the passage?

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Love covers a range of strong and positive emotional and mental states, from the most sublime virtue or good habit, the deepest interpersonal affection to the simplest pleasure. An example of this range of (1) ____________________ is that the love of a mother differs from the love of a wife, which also differs from the love of food. Most commonly, it (2) ______________ to a feeling of strong attraction and deep emotional attachment. Love is considered to be both positive and negative; with its virtue representing human kindness, compassion, and affection, as “the unselfish loyal and benevolent concern for the good of another”; and its vice representing human moral flaw, (3) ______________ to vanity, selfishness, amour-propre, and egotism, as it potentially leads people into a type of mania, obsessiveness or codependency. It may also describe compassionate and affectionate actions (4) _____________________ other humans, one’s self or animals. In its various forms, love acts as a major facilitator of interpersonal relationships and, owing to its central psychological importance, is one of the most common themes in creative arts. Love has, supposedly, a function to keep human beings (5) ___________________ against menaces and to facilitate the continuation of the human species

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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.
5. The passage implies that Melville stayed in Tahiti because......

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Money habits matter a lot in a relationship, even if you’re not married or living together, concludes Melissa A Curran, an associate professor at the University of Arizona, in a new study published in the Journal of Family and Economic Issues. That’s why she recommends being picky when it comes to dating. “Young adults should choose their romantic partner wisely,” Curran tells CNBC Make It. She and her colleagues assessed over 500 young twenty-somethings in committed relationships and had them rate their health and overall life satisfaction. She asked them questions related to their partners’ financial responsibility, such as, Do they spend within a budget? And, Do they usually pay off their credit cards in full? The researchers found that the more responsible the participants perceived their partners to be with money, the higher their own sense of well-being and the happier they were with their relationships. The opposite was also true. Participants who thought their partners were bad with money had a lower sense of well-being and felt less committed to the relationship. “This finding makes sense developmentally as the young adults are transitioning to adulthood,” says Curran. “It would make sense for them to draw upon romantic partners in terms of financial socialization agents.” By socialization agents, she means people who can teach and influence the participants on matters related to money. The idea is that the financial habits of whoever you’re dating can rub off on you. If your partner is bad with money, you might become bad with money too, which in turn affects your life overall, since the researchers also confirmed that your own financial habits definitely affect your well-being. For many young adults, parents are the most influential socialization agents. So, in this study, Curran also asked the participants about what their parents expected of them when it came to their finances. Did their parents, for example, expect them to track their spending? The researchers found that high expectations from an involved parent led the participants to perform better on a financial literacy test. But, unlike romantic partners, they did not seem to influence well-being. If you’re bothered by your significant other’s over-spending or general irresponsibility with money, Curran and her colleagues recommends talking things through. “Having discussions about finances and making financial decisions together helps couples become closer and more satisfied with their relationships.”
3. According to paragraph 2, what is NOT correct about the research of Melissa A Curran?

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Plastic bags are used by everybody. From a vegetable vendor to a designer store, everyone seems to use them. Even though they are one of the modern conveniences that we seem to be unable to do without, they are responsible for causing pollution, killing wildlife, and using up the precious resources of the Earth. But, most of us are blissfully unaware of the repercussions that are occurring and will take place in the future because of the plastic bags. Every once in a while, the government passes out an order banning store owners from providing plastic bags to customers for carrying their purchases, with little lasting effect. Plastic bags are very popular with both retailers as well as consumers because they are cheap, strong, lightweight, functional, as well as a hygienic means of carrying food as well as other goods. About a hundred billion plastic bags are used every year in the U.S. alone. And then, when one considers the huge economies and populations of India, China, Europe, and other parts of the world, the numbers can be staggering. The problem is further exacerbated by the developed countries shipping off their plastic waste to developing countries like India. Once they are used, most bags go into landfills. Each year, more and more bags are ending up littering the environment. Once they become litter, plastic bags find their way into our waterways, parks, beaches, and streets. And, if they are burned, they infuse the air with toxic fumes. About 100,000 animals, such as dolphins, turtles, whales, penguins are killed every year due to these bags. Many animals ingest plastic bags, mistaking them for food, and therefore, die. And worse, the ingested plastic bag remains intact even after the death and decomposition of the animal. Thus, it lies around in the landscape where another victim may ingest it. One of the worst environmental effects is that they are non-biodegradable. The decomposition takes about 400 years. No one will live so long to witness the decomposition of plastic! Thus, save the environment for the future generations as well as animals. Petroleum products are diminishing and getting more expensive by the day, since we have used this non-renewable resource increasingly. And to make plastic, about 60-100 million barrels of oil are needed every year around the world. Surely, this precious resource should not be wasted on producing plastic bags, should it? Petroleum is vital for our modern way of life. It is necessary for our energy requirements - for our factories, transportation, heating, lighting, and so on. Without viable alternative sources of energy yet on the horizon, if the supply of petroleum were to be turned off, it would lead to practically the entire world grinding to a halt. So, what can be done? A tote bag can make a good substitute for carrying groceries and the shopping. You can keep the bag with the cashier, and then put your purchases into it instead of the usual plastic bag. Recycling the bags you already have is another good idea. These can come into use for various purposes, like holding your garbage, instead of purchasing new ones. While governments may be working out ways to lessen the impact of plastic bags on the environment; however, each of us should shoulder some of the responsibility for this problem, which ultimately harms us. Plastics are not only nonbiodegradable, but are one of the major pollutants of the sea. For a clean and green environment, try to use alternatives to plastic whenever and wherever possible. Cut down your use of plastic, and do your bit to save our planet  
7. What does the word “it” in the last paragraph refer to?

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 following questions:
The ruined temples of Angkor are perhaps one of the most impressive Seven Wonders of the World. Located in modern day Cambodia near Lake Tonle Sap, the largest freshwater lake in Asia, Angkor was the seat of power for the Khmer Empire for the ninth to the fifteenth century. The ruins of Angkor are documented as some of the most impressive ones in the world, rivaling the pyramids of Giza in Egypt. Why this mighty civilization died out is a question that archaeologists are now only beginning to ponder. The answer, it turns out, may be linked with the availability of fresh water.
One possible explanation for the downfall of the Khmer Empire has to do with the inhabitant’s irrigation system. The temples and palaces of Angkor were constructed around a series of artificial reservoirs and canals which were annually flooded to capacity by the Mekong River. Once filled, they were used to irrigate the surrounding paddies and farmland during the course of the year. Farmers were completely dependent on the water for their crucial rice crop. Without consistent irrigation, the farmers would have been unable to maintain functional crop production.
Scientists speculate that toward the end of the Khmer Empire the hydraulic system of the reservoirs and canals broke down. The construction of hundreds of sandstone temples and palaces required an enormous amount of physical labor. In addition, as the capital of Khmer Empire, Angkor contained upwards of one hundred thousand people who resided in and around Angkor. In order to feed so many people, the local farmers were driven to grow food more quickly and more efficiently. After centuries of continual use, the irrigation system was pushed beyond its capacity. Soil erosion, nutrient depletion, and loss of water led to decrease in the food supply. With the less food available, the people of Angkor slowly began to migrate to other parts of Cambodia, thus leaving the marvelous city of Angkor to be swallowed by the jungle. Therefore, it is speculated that the Khmer Empire may have fallen victim to its own decrepit infrastructure.

The hydraulic system of reservoirs     .