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The Invention of the Periodic Table
If you are looking to gain a better understanding of the world around you, chemistry is the perfect subject to study. It is an examination of matter, its properties, and its interactions with everything around it. Where physics often deals with concepts and theories that are difficult to test and observe, chemistry principles can easily be applied to medicine, cooking, and several other areas. At the heart of all these discoveries is one vital chart that organizes elements based on their atomic number and chemical properties: the periodic table. Although the first periodic table was published in 1869, it was a work in progress for hundreds, if not thousands of years. Since ancient times, people have been fascinated with elements such as gold, tin, and copper in their natural forms. They were mined and used to make jewellery, weapons, coins, and many other things. Over time, people became more curious about these metals and how they were composed. In ancient Greece, Aristotle and other philosophers claimed things were made from the elements of earth, water, fire, and air. For years, this theory was accepted. Then people began to reevaluate this concept during the Age of Enlightenment. In 1661, Irish scientist Robert Boyle defined an element as something that “cannot be broken down into a simpler substance by a chemical reaction”. Over a century later, French chemist Antoine-Laurent Lavoisier would publish the first modern textbook on chemistry. In it, he listed several substances which he believed should be classified as elements into two categories: metals, and non-metals. Although his work wasn’t completely accurate, it represented a major step forward at the time. Over the next century, scientists started to classify the elements into different groups depending on their properties and atomic weights. However, it is Russian chemist Dmitri Mendeleev who is usually credited as the first person to make a periodic table. Although other scientists had submitted tables, they were eventually rejected by the scientific community for a lack of detail. Mendeleev arranged all of the elements according to their atomic mass. He was even smart enough to leave empty spaces for elements which hadn’t been discovered at the time. Although Mendeleev’s periodic table wasn’t perfect, it set the format which is similar to the one used today.
3. Why did people first become interested in elements?

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Cholera, a highly infectious disease, has resulted in millions of deaths time after time over centuries. It is caused by the bacterium Vibrio cholera, first isolated by Robert Koch in 1883. The organism enters the body through the digestive tract when contaminated food or water is ingested.The bacteria multiply in the digestive tract and establish infection. As they die, they release a potent toxin that leads to severe diarrhea and vomiting. This results in extreme dehydration, muscle cramps, kidney failure, collapse, and sometimes death. If the disease is treated promptly, death is less likely. In many countries, a common source of the organism is raw or poorly cooked seafood taken from contaminated waters. The disease is especially prevalent after a natural disaster or other destruction that results in a lack of fresh water. Sewer systems fail, and waste travels into rivers or streams; piped water is not available so people must take their drinking and cooking water from rivers or streams. Because people frequently develop communities along waterways, the disease can be spread easily from one community to the next community downstream, resulting in serious epidemics
5. According to the passage, what is a symptom of the infection?

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Getting Closer to Nature at National Parks
In modern times, we seem to be getting more separate from nature with each passing day. Most of us spend the majority of our time indoors, typing away at computers and fiddling with digital devices. All the while, we are destroying the planet’s natural beauty by cutting down forests and building cities in their place. In an effort to preserve nature for future generations, national parks were created. The primary function of national parks is conservation. In many cases, it is a matter of national pride for countries to protect their indigenous species. Although several nations considered opening national parks, the US was the first country to officially do so when Yellowstone Park opened in 1872. This designation made the federal government responsible for taking care of the territory. Soon after, national parks started to open in Australia, New Zealand, Europe, and eventually across the globe. Today, almost 100 countries have established their own national parks. In total, there are over 6,500 worldwide. There are several incredible national parks that have a lot to offer. Kruger National Park in South Africa at 19,633 square kilometers is one of the largest game reserves. Tourists can go on safari and witness elephants, rhinoceroses, lions, and several other large mammals in their natural environments. At 75,000 square miles, the Northeast Greenland National Park is the world’s largest. In fact, it is larger than all but 30 countries in the world. Despite differences in names, location, and rules, most natural parks have certain traits in common. For one, they are usually open to visitors throughout the year. Those who come to the park can take part in a wide scope of outdoor activities including hiking, camping, cycling, bird watching, and fishing. Other options may include horseback riding, rafting, or scuba diving if the territory is suitable. In most places, visitors are encouraged not to feed the animals. The purpose for this law is twofold: to protect the animals as well as those who might feed them. Animals also have strict dietary needs, so feeding them exotic foods could make them sick. Feeding wild animals could also cause them to aggressively pester humans they encounter in the future for food. However, as long as you follow the rules, you are assured of having a great time at whichever national park you visit.
2.  What is the main idea of the second paragraph?

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The Brain: Myths and Facts
There are a lot of myths about the human brain. We are going to tell you a little about these myths, and we are also going to give you the truth. One of the biggest myth is that we only use 10 percent of our brains. The next part of that myth is that if we can learn to use the rest of our brains, then we will be much smarter. People say this all the time, but it is absolutely not true. The truth is that although we don’t know everything about the human brain, we know that each part of it has an important function. Modern scientists call the “10 percent myth” ridiculous. The other most popular myth is about being “right brained” or “left brained”. According to this myth, people who use the right side of their brains tend to be more artistic and creative. People who use the left side of their brains tend to be better at maths and science. This myth is as popular as the 10 percent myth, and it is also wrong. In 2013, a study at an American university examined the right brain and left brain myth. According to the study, we use both sides of our brains equally. It is true that we use different parts of our brains for different things: We use our left side for language more, and our right side when we need to pay attention. But there is no evidence that creative people use the right side more, or that scientific people use the left side more. We have talked about myths, so let’s look at a few interesting facts about the brain. First of all, the brain feels no pain. Second, about 75 percent of the brain is made of water. It is also the fattest organ in your body. Another interesting fact about the brain is that around the time you turn 18 years old, it stops growing.
5. The word “_ridiculous_” in paragraph 2 is closest in meaning to ________

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I close friend gave me a wonderful present on my birthday.

---139--- the past week you may have experienced increased wait times for our C-level elevators, which service floors 25 through 36. We have contacted Higwam, our elevator maintenance contractor, who ---140--- repairs in the elevator shafts. This is to alert all residents that beginning tomorrow and through the end of the week, you are likely to see Higwam technicians working in the lobby. They are planning to work on one unit at a time in order to keep the others operational while repairs are in progress, so for the next few ---141---, there may continue to be prolonged wait times. ---142---.

140.................

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
People travel for a lot of reasons: Some tourists go to see battlefields or religious shrines. Others are looking for culture, or simply want to have their pictures taken in front of famous places. But most European tourists are looking for a sunny beach to lie on.

Northern Europeans are willing to pay a lot of money and put up with a lot of inconveniences for the sun because they have so little of it. Residents of cities like London, Copenhagen, and Amsterdam spend a tot of their winter in the dark because the days are so short, and much of the rest of the year in the rain. This is the reason why the Mediterranean has always attracted them. Every summer, more than 25 million people travel to Mediterranean resorts and beaches for their vacation. They all come for the same reason, sun!

The huge crowds mean lots of money for the economies of Mediterranean countries. Italy’s 30,000 hotels are booked solid every summer. And 13 million people camp out on French beaches, parks and roadsides. Spain’s long sandy coastline attracts more people than anywhere else. 37 million tourists visit yearly, or one tourist for every person living in Spain.

But there are signs that the area is getting more tourists than it can handle. The Mediterranean is already one of the most polluted seas on earth. And with increased tourism, it’s getting worse. The French can’t figure out what to do with all the garbage left by campers around St. Tropez. And in many places, swimming is dangerous because of pollution.

None of this, however, is spoiling anyone’s fun. The Mediterranean gets more popular every year with tourists. Obviously, they don’t go there for clean water and solitude. They tolerate traffic jams and seem to like crowded beaches. They don’t even mind the pollution. No matter how dirty the water is, the coastline still looks beautiful. And as long as the sun shines, it’s still better than sitting in the cold rain in Berlin, London, or Oslo.

The latter half of the last sentence in paragraph 3, “or one tourist for every person living in Spain” means .

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Getting Curious about Curiosity’s Mission to Mars
The topic of space exploration reached a high point during the 1960s, as Soviets and Americans competed for dominance. Yet after the Soviets put the first man in space and Americans landed the first men on the moon, many people lost interest as nothing else could compare to these groundbreaking accomplishments. Recently, a robotic rover on a mission to Mars has generated massive interest the public. Curiosity is a robotic car-sized rover that is part of NASA’s long-term plan to learn more about the terrain and conditions on the Red Planet. One of its main goals was to determine whether or not it was possible for life to develop on Mars. Using mechanical arms, Curiosity can gather soil and rock samples from the ground and analyze them to determine their chemical composition. Since transporting around Mars was vital to the success of the mission, a lot of effort was put into Curiosity’s transportation abilities. Mars’ terrain is not smooth, so designers enabled Curiosity to roll over bumpy areas. Once Curiosity left the Earth, there would be no opportunities to repair it, so engineers also had to be spot on about Curiosity’s power solution. Therefore, they devised a system that can generate power internally from a radioisotope generator. Finally, to capture stunning pictures of Mars, Curiosity was equipped with several state-of-the-art cameras. The cameras also help the rover avoid hazards, navigate, and detect information about the atmosphere. After a 350-million-mile journey, Curiosity landed on Mars in 2012, an impressive 1.5 miles away from its initial target. Upon arrival, NASA’s website crashed due to an overload of visitors. People just couldn’t seem to get enough information on the mission. But the real thrills came in the weeks and months that followed, as people got their first real glimpse about what life was really like on Mars. The mission was originally supposed to last for two years, but scientists are now optimistic that it could continue for up to 15 years, depending on Curiosity’s condition. No matter what happens at this point, it is safe to say that Curiosity’s mission to Mars has been a smashing success.
4. All of the following are the difficulties that Curiosity had to overcome EXCEPT that __________.

No one can predict the future exactly. Things may happen ____

(309)______

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I was born to dance. I've been dancing all my life, ever since my mother, who gave up a dancing career on the stage when she married my father, picked me up and twirled me around as an infant. As much as I loved dancing with her, her greatest gift to me was her “unconditional love” during her lifetime.

My parents divorced after only 5 years of marriage, but my father remarried a lovely lady who also loved to dance. They used to take me to a dancing club where I would listen to the music and watch them dance-occasionally my step-mother, Mary, invited me to dance.

I also met my wife, Charlotte, in a dancing party. I danced with her for about 15 minutes, and during that brief span, I realized that I fell in love with her. We kept dancing throughout our marriage. My earliest memories of dancing with my daughters started when I came home from work to our small home in Marblehead, Massachusetts, and my daughter Laura was about 3 years old. It was very relaxing for me to turn on the record player, pick up Laura in my arms, and dance her around the room!

Our family danced a lot. My daughters, Laura and Anne, and I continued to dance on every occasion. One favorite memory I have of dancing with Laura and Anne was when I took each of them when they were seniors in high school to the Daddy-Daughter dance. We won both dance competitions!

As their father, I have tried to provide my daughters with unconditional love, as my Mother provided to me, endless emotional and loving support, and good educations and life experiences which have helped prepare them for happy and successful adult lives. Being a father who is worthy of their love and respect, I consider fatherhood a privilege, not an entitlement.

In 1994, my oldest daughter Laura gave me a lovely book, which I still have, entitled “Fathers and Daughters.” My Father’s Day suggestion to every father is to dance with your daughters at every opportunity. It will not only bring you closer, it will give them memories of you “to hang onto” long after we are gone.

The writer _____.

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It is ..................... in the countryside than in a city.

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'Let's break for lunch,' said Mathew.

Rewrite sentences without changing the meaning
Obesity may be considered a serious health problem.

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I have known her _________ two years.

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The Most Powerful Force in Space
A black hole is a spot in space that has incredibly powerful gravity. A hole’s gravity is so strong that it pulls everything nearby into it. It can pull stars, planets, and other things. Nothing can escape a black hole. In fact, they are so powerful that even light cannot escape them. Scientists first started talking about black holes in the year 1783. That year, one scientist said that in the universe, there might be places with gravity strong enough to trap light. However, that scientist didn’t use the term “black hole”. The term “black hole” was invented in 1967. Black holes are formed when a star dies. When a star dies, it collapses. When that happens, a huge amount of matter crowds into a very small space. The matter becomes very, very dense. How much matter are we talking about? Imagine a star that is the size of ten suns. Imagine fitting that amount of matter into New York City. That is what a black hole is like. Its gravity is so powerful because it has so much matter. However, not all black holes are huge. Scientists believe that some black holes are the size of atoms. Although these black holes are tiny, they might have the same amount of matter that a mountain has. We can’t see black holes because they don’t have any light. They are completely invisible. Scientists can guess where black holes are by studying nearby stars and planets. If gravity seems to be pulling the stars and planets to one spot, then scientists believe that the spot is a black hole. Some people wonder if a black hole could ever destroy the Earth. We do not need to worry about that. There is no black hole that is close enough to destroy the Earth. The closest black hole is about 7,800 light years away. In addition, the sun is not big enough to create a black hole.
3. Which statement is NOT true?

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Fighting Back against Bullying
It is often said that childhood is the most joyful period in a person’s life. This is supposed to be a time when children can focus on their studies and enjoy their free time with friends. However, these days more and more children are experiencing a stressful and miserable adolescence due to bullying. Bullying occurs when one student, or a group of students, uses aggression to harm another child and try to make them feel bad. This abuse can either be physical, such as pushing or beating another student, or it could take the form of mental abuse, such as taunting and teasing the student. Although it may seem harmless to some, studies show that bullying can greatly impact a child’s life and have long-lasting negative effects. People who have been bullied may experience self-esteem issues and start to lack confidence in almost everything they do. These traits can make it difficult to manage relationships and even cause them to have trouble holding down a steady job. One of the most harmful types of bullying that is on the rise is cyberbullying. The bullied student is targeted in cruel or threatening e-mails, instant messages, or hateful public posts about them. In many cases, bullies will post embarrassing pictures of the victim or spread nasty rumors about them through social media. In some tragic cases, children have even turned to suicide, feeling that they can’t deal with the humiliation. If you are being bullied by another student, you don’t have to accept it or suffer. There are some steps you can take to deal with the problem. At first, you may try to ignore the bully, as they will often lose interest in bothering you if you don’t react. If the bullying persists, however, you should tell a trusted adult as soon as possible. This could be a parent, a family friend, a teacher, a school guidance counselor, or even the school principal. Until recently, many teachers and school officials turned a blind eye to bullying, believing that the students would eventually sort it out by themselves. But this mindset has changed in recent years in light of some of the tragedies that have occurred. If for any reason you feel that your complaints are not being taken seriously, there are other groups available online who will help you deal with bullying. By dealing with bullying at an early stage, you can stop it before it gets much worse.
5. The phrase “turned a blind eye to” in the last paragraph is closest in meaning to ________.

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Some technological developments are the results of years of diligent work. Others are stumbled upon by accident. The discovery of X-rays is in the second category. In 1895, X-ray radiation was accidentally discovered by a physicist named Wilhelm Rontgen, while he was working in his lab. Rontgen discovery greatly advanced medical science. One night in 1895, Wilhelm Rontgen was working with an electric device called a Crookes tube. A Crookes tube is a glass tube with metal components inside it. When turned on, the tube produces a stream of electrons. Rontgen and other scientists observed a new form of energy escaping from the front end of the Crookes tube. Rontgen wanted to be the first to discover this new mysterious energy. To do this, he needed to make sure the tube was covered with black cardboard. This would make the room completely dark and allow him to better see this new form of energy. Rontgen was hoping to observe this new energy on a special screen that would be placed right in front of the Crookes tube. Amazingly, before the screen was placed near the Crookes tube, Rontgen already noticed the screen was glowing. He bought the screen closer, and the glow became brighter. (1) He then placed a book between the end of the tube and the screen-the glow was still there. (2) Rontgen realized that a new and different form of radiation must be causing the screen to glow. (3) As he didn't know what kind of radiation it was, he named it "X". (4) Rontgen soon started studying the new type of radiation. He designed experiments which allowed him to test how far X- rays could penetrate. He also had the bright idea of trying to take photographs with X-rays. One day, he tested his theories by asking his wife to put her hand between a photographic plate and a Crookes Tube. Sure enough, the resulting image of the bones in his wife's hand was the first ever X-ray photograph of the human body. After taking that first photograph, Rontgen understood how X-rays could benefit doctors and patients. He shared his discovery, and soon X-ray machines were appearing in hospitals. X-rays were very useful for medicine because they let doctors see a patient's bones. If a patient had a broken bone, it was made visible by the X-ray image. This let doctors know the right way to repair the fracture. Wilhelm Rontgen's accidental discovery has now been helping people for over one hundred years. Thanks to X-rays, broken bones can be repaired reliably and effectively. We should be grateful to Wilhelm Rontgen for making his discovery freely available and greatly advancing medical science. Because of this, we humans are able to live longer, healthier lives.
1. What was Wilhelm Rontgen's job?

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
                          CYBERFASHION
Most of us own modern gadgets such as mobile phones, or digital cameras. We may carry them round in our pockets, or attach them to our bodies. But not for much longer! So far designers have succeeded  in  (1)........................ tiny  bits  of  technology  di–rectly  into  our  clothing.  In  actual  fact “cyberfashion” is the latest trend! One example, the Musical Jacket, is already in the shops and stores. This jacket is silk. It is (2)................. by a keyboard, also manufactured from fabric, which is connected to a tiny device (3)......... plays music.
At present, you have to touch a shoulder pad to hear the music. But in the future, you will be able to operate the device just by turning your wrist or walking! For many athletes, scientists have invented a smart shirt which measures your heart rate, body temperature and respiration rate! (4).............. , the most romantic piece of cyberfashion must be the Heartthrob Brooch. This item of jewellery, made from diamonds and rubies, has two miniature transmitters. They make the brooch glow in time to the beating of its wearer’s heart. If you meet someone (5)..................... , your heart will beat faster – and your brooch will let everyone know how you feel!

(3)................................

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Glenbrook South (GBS) High School is in a suburb of Chicago, lllinois, in the United States. It is an award-winning school with a highly competent teaching staff. It has over 400 Asian Pacific American students-over 17 percent of the students in the school. Of these, the majority are Korean American. This is very unusual in a state where Korean Americans are less than 1 percent of the population. The interactions of the Korean American students at GBS were the subject of an article in Asian Week magazine. Different Korean American students react differently to being in a high school where most students are white. Professor Pyong Gap Min, an expert on Korean life in America, believes that Korean Americans in this situation can sometimes feel inhibited or ashamed of their Korean identity. Asian Week interviewed a number of GBS students, and each had a different attitude. Eighteen-year-old Alice said that she used to spend time only with Korean American friends. Although she felt secure with those friends, she found herself motivated to form closer relationships with non-Koreans, too. She said that she felt she was missing out on new experiences and challenges. Seventeen-year-old John moved in the opposite direction. In junior high school, most of John's friends were white. After coming to GBS, his sense of his Korean American identity was restored, and he decided to have mainly Korean American friends. He feels that he and his Korean American friends understand each other better. For example, they understand about severe parental pressures to succeed at school; John felt his white friends couldn't really understand. Sixteen-year-old Paul has some Korean American friends, but he says he spends most of his time with his white friends. He is often the only Asian American in the group, but he doesn't mind. What Paul likes about the white culture is that he can be more radical - he can be as loud and funny as he wants to be. He says he doesn't see as much of that among the Asian students. Without belittling the importance of what these students had to say, it's important to remember that their opinions at this phase of their lives are bound to change as they grow into adulthood. But these honest opinions can help US better understand issues of cultural relations, and their honesty might help Americans from different cultural groups to get along better in the future. 
7. The phrase "For example" in paragraph 3 introduces a sentence that gives examples of: 

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Learn/ English/ help/ us/ get over/ the/ language barriers.