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

When children get their first pair of glasses, they are often surprise to see that trees and flowers have sharp clear outlines

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Most sources of illumination generate light over an appreciable period, and indeed if  an object is lit for a very brief time(less that 1/25 second), the human eye will not react in time to see the object. A photographic emulsion - that is, a light-sensitive coating on photographic film, paper, or glass - will, however, record much shorter bursts of light. A photographic flash can therefore be used to capture high-speed movement on film as well as to correct deficiencies of the normal surrounding lighting. Photoflash is now generated electronically, but the earliest form, first used in 1864, was a paper bag containing magnesium wire and some oxygen-rich substance, such as potassium chlorate. When the bag was ignited, the metal burned with an intense flash. A contemporary observer reported that “this quite unsafe device seems to have done nothing worse that engulf the room in dense smoke and lead to pictures of dubious quality and odd poses.”  The evolution of the photoflash was slow, flashbulbs, containing fine wire made of a metal, such as magnesium or aluminum, capable of being ignited in an atmosphere of pure oxygen at low pressure, were introduced only in the 1920’s. In the earliest type, the metal was separated from the oxygen by a thin glass bulb. The flash was fired by piercing the bulb and allowing the oxygen to come into contact with the metal, which ignited spontaneously. Later bulbs were fired by an electric battery, which heated the wire by passing a small current through it. Other combinations, such as the pairing of oxygen difluoride with zirconium, have also been used. In each case enough energy is given out to heat the oxidizable metal momentarily to a white hot emission of visible light. The smoke particles are so small that they cool rapidly; but since they are white, they contribute to the brilliance by reflecting the light from their still glowing neighbors. A slightly bigger form of the metal will burn for a longer time. 
7. According to the passage, what helps a flashbulb burn longer?

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After inventing dynamite, Swedish-born Alfred Nobel became a very rich man. However, he foresaw its universally destructive powers too late. Nobel preferred not to be remembered as the inventor of dynamite, so in 1895, just two weeks before his death·, he created a fund to be used for awarding prizes to people who had made worthwhile contributions to humanity. Originally there were five awards: literature, physics, chemistry, medicine, and peace. Economics was added in 1968, just sixty-seven years after the first awards ceremony.
Nobel's original legacy of nine million dollars was invested, and the interest on this sum is used for the awards which vary from $30,000 to $125,000. Every year on December 10, the anniversary of Nobel's death, the awards (gold medal, illuminated diploma, and money) are presented to the winners. Sometimes politics plays an important role in the judges' decisions. Americans have won numerous science awards, but relatively few literature prizes.
No awards were presented from 1940 to 1942 at the beginning of World War 11. Some people have won two prizes, but this is rare; others have shared their prizes.

In the first paragraph, “worthwhile” is closest in meaning to     .

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Since 2015, the annual Women in the Workplace benchmarking report has covered over 600 of the largest U.S. companies employing more than 20 million people, and has individually surveyed more than a quarter-million employees. That research base shows us how better sponsorship and improved training to counter unconscious bias can speed our progress to gender equality. And it reveals the changes that have—and haven’t—happened over the past few years. There are some bright spots. In 2019, nearly 90% of respondent companies say that gender equality is a top priority. Almost half report having at least three women on their leadership team And greater openness to flexible working is allowing many more women— and men—to work remotely. But some areas are proving stubbornly difficult to improve. Most strikingly, it’s much harder for women than men to achieve their first promotion. Indeed, for every 100 men who step up from an entry level position to a management role, only 78 women—and just 52 black women—will receive the same promotion. Over five years, that gap adds up to a difference of one million promoted women, with lasting repercussions further along the talent funnel: only 1 in 5 C-suite members are women, and only 1 in 25 are women of color. Moving up the ladder, the 21% figure for women in the C-suite is also less encouraging than it seems. Women are much more likely to have a staff role—chief human resources officer, general counsel, or CFO—while men take more of the line roles, running the largest business units with their own P&L lines. It’s rare for any leader in a staff role to be promoted to CEO.  
2. According to paragraph 1, what is NOT mentioned about the findings of Women in the Workplace?

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The aviation industry, especially the commercial aviation sector, is constantly striving to improve both the way it works and its customer satisfaction. It has begun using artificial intelligence. Though AI in the aviation industry is still in the nascent stage, some progress has been made already as certain leading carriers invest in AI. To make a long story short, AI can redefine how the aviation industry goes about its work. In 2017, American Airlines conducted an app development competition with the goal of having an app developed for making baggage screening easier for passengers. The competition, named HackWars, was themed upon artificial intelligence, drones and augmented and virtual reality. The winner, known as “Team Avatar,” developed an app that would not only allow passengers determine their baggage size before arriving at the airport, but also prepay any potential baggage-related expenses. United Airlines is using Amazon’s Alexa to have certain common customer queries answered. In September 2017, United announced a collaboration with Alexa. The feature is known as the United skill. To get started, all passengers need to do is to  add the United skill to their Alexa app and then start asking questions. Alexa answers common queries correctly, such as the status of a flight by number, check-in requests and availability of Wi-Fi on a flight. The reviews so far have been mixed, which points to the fact that there is a learning curve, and it is still a long way to go before AI can fully handle customer assistance. Tracking progress is an enormous challenge that airlines will face. The first thing they need to do is to develop analytics that will help them develop and process accurate data. However, that in itself is a challenge. What kind of analytics will help? For example, customer satisfaction is going to be one of the most important factors in success. What kind of analytics will determine that airlines have been improving on customer satisfaction parameters? AI needs huge investments, and probably the biggest risk in this is smaller, especially budget airlines are going to miss out on reaping the benefits of AI fully. Does that mean that the performance of the smaller carriers will be impacted? That might not be the case, because we might be moving toward more acquisitions and mergers. Bigger airlines will have a massive appetite for acquiring smaller airlines with an eye on the market. It is not all gloom and doom though, because smaller airlines like Southwest have already shown some initiatives toward embracing AI. It is surprising that a sector as important as aviation has woken up to AI so late. As AI in aviation picks up its pace, there could probably be a few mergers, acquisitions or even closure of small airlines which will not be able to afford the investments. Now, AI seems the best option to take aviation to the next level.
5. According to paragraph 3, Amazon’s Alexa is ______

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Individual differences in temperament or behavioral styles are important in family life  in several ways because they affect the nature of the interactions among family members. Some children adapt quickly and easily to family daily routines and get along well with their siblings. Others, especially highly active, intense and “prickly” children have a more difficult time adjusting to everyday demands, and their interactions with parents and siblings may lead to friction and stress. Consider how an active, impulsive child can bother an older sibling who is trying to complete a school project, or how a distractible child who is low in persistence can frustrate parents’ efforts to get him to complete his homework or to finish a household chore.  It is important to note that parents, like children, also differ in temperament. Some are quick reacting and intense, while others are quiet and slow to respond; some are flexible and adaptable, and others are not. The “mix” between parents’ and children’s temperaments has a strong effect on family life, sometimes leading to positive interactions, sometimes to frustrations, and sometimes even to conflicts. It is interesting to note that parents also differ in the expectations they have about their children’s behavior, and how they view and tolerate differences in temperaments. For example, certain constellations of temperament such as high activity, intensity, and persistence may be tolerated and valued in boys, but not in girls. Conversely, shyness and sensitivity may be viewed as acceptable in girls, but not in boys.  This leads to the notion of “goodness of fit”, which can be a useful framework for helping parents figure out how temperament affects relationships in the family. “Goodness of fit” refers to the match or mismatch between a child and other family members. For example, a high-activity, intense child may upset and irritate a quiet, slow-paced, reflective parent. An active, quick-responding parent may be impatient with a slow-to-warm-up child, whom the parent may see as lazy or indifferent. Sparks may fly when both parent and child are intense and quick responding.  Life in a family is not the same for all children, and temperament is one of the ingredients in the “fit” between child and family. Don’t assume family friction is a result of your child having LD or ADHD. It could be because of your child’s temperament — and yours! 
8. Which of the following can be inferred from the passage? 

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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
8. Which of the following is NOT true about hamams?

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An integral part of human life is the sports. As we all know, many competitive and  entertaining activities are engaged in sports. A sport is a way to stay fit and healthy. If we want to be physically fit we have to have an active life to stay healthy, so it is always a good idea to participate in sports and games.  The sport has inherent discipline and physical demands so that enthusiasts tend to maintain a healthy lifestyle. Weight loss, more energy, better mobility and a lot of things can come from the sport. All of this can describe a good person’s health. People are taught by sports and games to appreciate their health. The energy and vitality necessary to participate cannot be sustained without health. For professional athletes, their fitness and health depend on their livelihood. Sport also aims to keep individuals in good health and endurance.  Water is the most important nutrient that we cannot live without. If you do sports, you tend to sweat more thus increase your metabolic rate. If you do not replace these fluids, you can have very serious health problems or you can even die. To have a healthy and active body we need to eat essential nutrients. Participating in sports activities will encourage you to drink more water since we develop the urge to do so when we participate in physical activities.  When participating in sports activities we come to learn new things. It makes us learn how to tackle things the difficult situation. Sports develop a sense of unity and brotherliness. It develops team spirit in us. It helps in developing mental and physical toughness. It improves our efficiency. With our day-in-day-out activities, we tend to become exhausted the more reason we need sports in our lives to help us forget stressful things we go through. Everybody should always play a sport once a week to keep themselves fit and healthy. Sport is a fundamental phase for a child who is learning. In education, it helps the students keep their value in life, students are taught various games in the very early stage of life at school. Nurturing sports talents from school encourages a lot of talented children and it affirms the sportsmanship in them. Those students who perform well are promoted to play at the national and international level. Sports can be a carrier developing option for many students.  As we know, a physical activity governed by a set of rules or habits is called sport. Sport is often involved in the competition. The sport was originally developed for recreation. When people want to do the distraction or recovery, they usually do sports, sports games or skill tests. From this, we can conclude that sport has large and varied manifestations.  Sport can be played indoors or outdoors. It can be done by individual or team, with or without competition. And we know that sport requires skill and physical effort. The growth and development of sport and its related industries were witnessed by modern sport. Because we know that a healthy person is a wealthy person, the sport is the secret of both health and prosperity. 
7. Which of the following about sport is NOT mentioned in the passage?

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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."
8. Which of the following most accurately reflects the author’s opinion of making a close online friend?

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Seniors in China are still highly likely to believe rumors and pseudoscience, according to reports. In recent years, China has seen more scientists and science communicators using digital platforms to combat pseudoscience, which is classified as rumors, statements, beliefs, ideas or practices that are stated as fact, but are often fabricated and scientifically untested. Despite that, many young Chinese have experienced difficulties when trying to pass on that message to older people. For example, last year, Dingxiang Doctor, a digital platform that debunks medical rumors online, released 101 articles that disproved common, inaccurate claims. However, many netizens said that when they forwarded the articles to family chat groups, they were questioned, scolded and even removed from the group by older family members. An online survey last year by Tencent, one of China’s biggest online businesses, indicated that nearly 40 percent of middle-aged and senior people had experienced online fraud, mostly related to healthcare products. Yun Wuxin, a food engineering expert who has popularized food science for more than 10 years, believes that, in general, members of the older generation lacked training in logical or critical thinking when they were young, so they have an exaggerated belief in personal experience, tradition or superstition. He said young people, especially today’s younger generation, have received better training and tend to hold skeptical or critical attitudes toward convention. He added that new media that popularize science in fresh, innovative ways － such as short videos, video blogs and animations － are very effective with young people. However, traditional methods, including television, community visits by scientists, neighborhood exhibitions and science columns in newspapers, are very important for middle-aged and elderly people who really need to understand science  
4. The word “fraud” in paragraph 2 is closest in meaning to ______

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Vietnamese women are very proud _________ the ao dai.

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An astronaut living in space begins a day in much the same way as he would on Earth.  The astronaut is able to brush his teeth and use the toilet in space. It is, however, rather challenging as the water droplets will (1) _________ around. The astronaut will also have to make to do with sponge baths.  There is a special plan for the astronaut on (2) _______ a spaceship which includes beverages and food items. The astronaut is allowed to have a maximum of three main meals a day. The meal varies each day until the sixth day. On that day, the menu is (3) _______ and the astronaut eats the meals he had on the first day. The food that is brought on a shuttle mission can be dehydrated, in natural (4) _________ for fresh. Sometimes, they are kept in thermostabilized cans or sealed pouches. It takes only thirty minutes to cook a delicious meal for a (5) ____________ of up to seven people on a space mission. However, astronauts have to eat slowly and carefully or the food will float away

Rewrite the sentence:
to/ Mary/ likes/ visit/ the/ best/ pagoda.

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My mom is a pretty talented pianist. She reads music very well and loves to play  Chopin and various other classical artists. One of my earliest memories involves sitting under her piano bench while she played. It gave her a lot of joy and a lot of personal pride, I think. I trust that she naturally wanted those things for me when she enrolled me in piano lessons when I was about seven years old.  I hated them. I was scared of my teacher. I hated practicing. I hated the songs I was being forced to learn. I hated reading music. I was a young kid, and there were other things I wanted to do instead. It just didn’t interest me, and no amount of begging and pleading on my mother’s part could get me to enjoy practicing. One thing in particular that she used to say as she was begging me to practice was, “One day, when you’re older, you will cherish the ability to sit down and play.” Nevertheless, after a couple years of once-a-week torture, she finally allowed me to quit.  Years went by. I switched schools when I was 11 years old, got a new best friend, and got interested in music. This was a critical turning point. My best friend loved the band Bush and lots of other alternative bands of the ‘90s, and listening to them unlocked a whole new sonic world for me. I fell in love, fell completely and totally in love, with rock music.  My friend taught me the form for a power chord on her acoustic guitar. If you know how to play a power chord, you can play or at least convincingly fake pretty much every single rock song in the world. It was like someone had given me my first hit of a powerful opiate.  I spent hours practicing in my room. Hours sounding out my favourite songs. More hours playing along with those songs in front of my mirror, pretending I was Scott Weiland, Dolores O’Riordan, Chris Cornell, or my personal favourite Louise Post (of Veruca Salt). I unlocked a talent within myself that had gone obscenely undiscovered and undeveloped when I was a young child banging my head against a piano keyboard, trying and failing to read a piece of music - I could play the guitar by ear. I just hadn’t had the time to figure that out because my mom was trying so hard to get me to do something that did not come naturally to me and that I had no desire to do.
2. The writer wrote she disliked all of the following EXCEPT ____

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Go is a game that has been around for 3000 years. It is widely accepted as the most challenging strategy game that exists. It takes years of playing for several hours every day to master the game. In other words, even though it has simple rules, it is not a simple game to excel at. Surprise! Deep Mind managed to create a machine that could master the game, without being programmed with explicit rules and without being taught by a professional Go player. AlphaGo mainly played against itself and learned from this self-play. At its core, it learned like a human learns, by looking at the board, evaluating the options, making moves, and learning from mistakes - it just did it a lot faster than any human can. This is extremely exciting because, at its core, what it means is that computer scientists have had all the tools they needed to do this for years. Neural networks have been known about and discussed since the middle of the last century. All it really took was simply getting creative with them, applying them in new ways. AlphaGo beating the world’s best Go player proves that AI has the potential to do anything. It can learn anything and understand anything, and from that learning and understanding it can accomplish what humans can accomplish in a much shorter period of time. You’re probably wondering what this all means. We’re much closer to the dream of an AI best friend than most of us would have dared to imagine a few years ago. AlphaGo can learn the most complex, intuition and creativity based logic game known to man and it didn’t do so through a finite database or search trees alone. It learned from practice and experience, just like we do, and the ability to create amazing new solutions to ancient puzzles suggests a realm of digital creativity never before fathomed. AlphaGo is not like other game playing AIs that have come before it. It is the future of intelligent and intuitive machines, one that we plan to turn toward more than just board games. From practical applications to that friend you’ve been hoping for, AlphaGo is sure to be the first of a new generation of self-learning intuitive AIs that go above and beyond the limited calculating capacities of its older siblings and contemporaries. The AI winter is over.
5. The word “realm” in paragraph 3 is closest in meaning to _______

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A new study shows that urbanization shifts this seasonal cue in nuanced ways, with cities in cold climates triggering earlier spring plant growth and cities in warm climates delaying it. The study also found that the urban heat island effect, the phenomenon in which cities are warmer than their surroundings, is not the only culprit behind the shift, suggesting that other aspects of urbanization, such as pollution, changes in humidity and fertilizer runoff, may also influence plants’ seasonal patterns.  Researchers analyzed millions of observations of 136 plant species across the U.S. and Europe to study how regional temperature and the local density of people-a proxy for urbanization—affect when plants sprout leaves and blossoms. Their results revealed a complex story: Separately, warmer temperatures and higher population density each spurred earlier springs. A 3.6-degree Fahrenheit increase in temperature bumped up plants’ production of leaves and flowers by about five and six days, respectively. A fourfold increase in human population density advanced flowering and leaf production dates by about three days. But the team found that when these two factors worked together, local temperature had an outsized influence. In cold regions—areas with an average November-to-May temperature of about 18 degrees-plants produced leaves and flowers about 20 days earlier in locations with about 26,000 people per square mile, compared with equally frigid wildland. When an area’s average November-to-May temperature jumped to 68, however, leaves and flowers appeared four and six days later, respectively, in locations with about 26,000 people per square mile, compared with equally balmy wildland. In New York, for example, plants are likely sprouting leaves about 9.5 days earlier and blossoms eight days earlier than uninhabited regions with the same temperature. Jacksonville, in contrast, is likely pushing leaf production later by about one day and flowers by about half a day, with leaves appearing two days later and flowers a day later in Houston.  Even after accounting for urban heat islands, the team’s models revealed cities significantly affect plants’ springtime growth. “Not only are there other things going on, but they actually matter quite a lot,” said study co-author Brian Stucky, Florida Museum research scientist. Plants may not be the only organisms affected by seasonal shifts, he added. “Seasons are such a big part of our lives. We define our world around seasonal things. Those rhythms are what we think of as the normal way the world works.” 
3. The word “it” in paragraph 1 refers to _____

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Although experts agree that traditional meetings are essential for making certain decisions and developing strategy, many employees view them as one of the most unnecessary parts of the workday. The result is not only hundreds of billions of wasted dollars, but the worsening of what psychologists call “meeting recovery syndrome”: time spent cooling off and regaining focus after a useless meeting.  It’s isn’t anything novel that workers feel fatigued after a meeting, but only in recent decades have scientists deemed the condition worthy of further investigation. Meeting recovery syndrome (MRS) is most easily understood as a slow replenishment of our limited mental resources. When an employee sits through an ineffective meeting their brain power is essentially being drained away, says Joseph A. Allen, a professor at the University of Utah. If they last too long, fail to engage employees or turn into lectures with little to no personal interactions, meetings will significantly diminish employees’ psychological stamina. Taking time to recover a must, but doing so comes at the expense of productivity.  As humans, when we transition from one task to another – such as from sitting in a meeting to doing normal work – it takes an effortful cognitive switch. We must make a big mental effort to stop the previous task and then expend significant mental energy to move on to the other. Some can bounce back from horrible meetings rather quickly, while others carry their fatigue until the end of the workday. It’s even worse when a worker has several meetings that are separated by only 30 minutes.  While no counter-MRS measures have been tested, Allen says one trick that might work is for employees to identify things or locations that quickly change their mood from negative to positive. As simple as it sounds, finding a personal happy place, going there and then coming straight back to work might be the key to reducing recovery time. Another solution is to ask ourselves if our meetings are even necessary in the first place. If all that’s on the agenda is a quickly catch-up, or some non-urgent information sharing, it may better for managers to send an e-mail to his or her subordinates instead. Most important, however, if for organizations to awaken to the concept of meetings being flexible, says Allen. We have to get rid of the acceptance of meetings as sites of pain, when they should be places of gain.” Allen says. 
2. Which of the following is NOT TRUE, according to paragraph 2?

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You can learn a lot __________ the local area by talking to local people.

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Most sources of illumination generate light over an appreciable period, and indeed if  an object is lit for a very brief time(less that 1/25 second), the human eye will not react in time to see the object. A photographic emulsion - that is, a light-sensitive coating on photographic film, paper, or glass - will, however, record much shorter bursts of light. A photographic flash can therefore be used to capture high-speed movement on film as well as to correct deficiencies of the normal surrounding lighting. Photoflash is now generated electronically, but the earliest form, first used in 1864, was a paper bag containing magnesium wire and some oxygen-rich substance, such as potassium chlorate. When the bag was ignited, the metal burned with an intense flash. A contemporary observer reported that “this quite unsafe device seems to have done nothing worse that engulf the room in dense smoke and lead to pictures of dubious quality and odd poses.”  The evolution of the photoflash was slow, flashbulbs, containing fine wire made of a metal, such as magnesium or aluminum, capable of being ignited in an atmosphere of pure oxygen at low pressure, were introduced only in the 1920’s. In the earliest type, the metal was separated from the oxygen by a thin glass bulb. The flash was fired by piercing the bulb and allowing the oxygen to come into contact with the metal, which ignited spontaneously. Later bulbs were fired by an electric battery, which heated the wire by passing a small current through it. Other combinations, such as the pairing of oxygen difluoride with zirconium, have also been used. In each case enough energy is given out to heat the oxidizable metal momentarily to a white hot emission of visible light. The smoke particles are so small that they cool rapidly; but since they are white, they contribute to the brilliance by reflecting the light from their still glowing neighbors. A slightly bigger form of the metal will burn for a longer time. 
3. The word “ignited” in paragraph 1 is closest in meaning to __________

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What does your family do to __________ ends meet?

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People have five senses. We have a sense of sight, hearing, smell, touch, and taste. Believe (1) _______ , your sense of smell is very important. Our nose tells us about our environment. When your nose smells something, it sends information to our brain. Smells tell us if there is danger nearby, or if there is something to eat. Of course, these tools were more useful in the past, but they still come (2) _______ today. The things you smell can affect your (3) _______ If you smell something nice, you are more likely to be happy. On the other hand, if you smell something unpleasant, you are more likely to be unhappy. That is (4) _______ there are so many businesses that work to create nice scents. Businesses also work on the best ways to deliver scents to people’s noses. Candles (5) _______. a whole room smell better. Oils and soaps also have health benefits.