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Obesity may be considered a serious health problem.

 

Sometimes forest fires have caused serious damage to both private and public property. They destroy many houses and cause deaths, particularly when they have reached villages which are close to the forests. It is more dangerous if a destructive fire burns away plants and trees that prevent erosion. If heavy rains occur after such a fire, landslides, ash flows, and flash floods can occur. This can result in property damage in the immediate fire area, and can affect the water quality of streams, rivers and lakes. Wind sometimes makes contributions to forest fires. In southern California, under the influence of Santa Ana winds, fires could move at tremendous speeds, up to 40 miles (60 km) in a single day, consuming up to 1,000 acres (4 km2) per hour.

What is the main idea of the text? 

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The cartoon is prohibited because it contains a lot of ___________ scenes

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Have you ever noticed that our machines are getting smaller? Cell phones, cameras, computers and everything else look smaller every year. One kind of new science involves machines that are smaller than we can imagine. The name of this science is nanotechnology. Nanotechnology means doing science, engineering, and technology at a very very small level. In other words, nanotechnology is the science of tiny things. But how tiny is the science of nanotechnology? In nanotechnology, scientists work with things that are the size of a nanometer. One meter has one billion nanometers. Here is another way to describe nanotechnology: it is the science of observing and controlling individual atoms and molecules. Nanotechnology is a new word, but the idea of studying atoms and molecules has existed for a long time. In 1959, an American scientist Richard Phillips Feynman gave a speech in which he claimed that we can see and control molecules and atoms. About ten years later, a Japanese professor came up with the term “nanotechnology”. Because nanotechnology is so new, we are only starting to understand how we can use it. Nanotechnology could be very useful in medicine. In the future, doctors may use nanotechnology to help with organ transplants. An organ transplant is the act of putting an organ into another person’s body. Scientists think that with nanotechnology, they might be able to make a person’s body accept a foreign organ. Nanotechnology might also help doctors fight infections, find diseases in patients, and deliver medicine to the right spot in patients’ bodies. Nanotechnology might also be useful in protecting the environment. It might be able to help us save energy, reduce waste, and keep water clean. For example, nanotechnology might be able to make some materials such as steel stronger. If we have stronger steel, we will be able to use it longer. That way, we can produce less steel and save our resources. Nanotechnology might be useful in so many ways. This science of studying tiny things could change the world.
2. The word “_which_” in paragraph 3 refers to _________.

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Incredible Shrinking Microchips
There is a popular old saying that “bigger is better”. Although this may be true in some regards, the exact opposite often applies in technology. As electronic components get smaller, it allows companies to manufacture tinier devices with more features. Thus began the never-ending quest to create the smallest microchips on the planet. Yet as these vital electronic components get smaller, they are also getting stronger and clever inventors are finding new ways in which to use them to do incredible things. Currently, the biggest limitation microchip producers face when trying to reduce chips’ size is the copper wires that provide electrical current throughout the chip. Although they can be made smaller, this can cause a whole host of problems such as melting and overheating. Thanks to the work of a few scientists from the UK though, this problem may soon be a thing of the past. Their solution is getting rid of the copper wiring altogether and using carbon nanotubes instead. Not only would this allow for smaller sizes but it would also increase the power that microchips can generate. In the end, this would translate into smaller and more powerful devices much to the delight of consumers all over the world. Corporate powerhouse Intel® has announced plans to create a line of tiny, low power chips that can be used in bracelets, smart watches, and other tiny devices. The chips will be called Intel® Quark, and they are being designed primarily to fit in biomedical devices. A key selling point to biomedical technology is that the devices have to be nonintrusive because people don’t want to carry around heavy equipment to monitor their health. If they can do this, Intel® will likely find several tablet and smartphone manufacturers who are willing to corporate Quark microchips into their devices. In a somewhat unusual project, researchers are working on a special microchip that will serve as miniature human organs in experiments. These “organ” chips could be used to test different medicines and study diseases. If realized, the technology could put an end to the use of lab mice and other animals for testing. Everyone from the largest pharmaceutical companies to the US military has shown interest in the project. Currently, the research team in charge of the project believes that within five years the organ chips will be used in practical research. It goes to show that thinking small often produces the biggest results.
4. All of the following are characteristics of using carbon nanotubes EXCEPT ________

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Is/ Nile/ longest/ river/ world?

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Don’t Handle with Care
People always go shopping for the latest and greatest gadgets. Speed, performance, and the latest functions are always key factors before making a purchase. Yet the most important factor of all, which often isn’t considered, is a product’s durability. After all, if a product breaks easily and can’t be repaired, the buyer will have wasted their investment. In other cases, weakly-designed product can cost someone their life. Thankfully, today’s inventors and engineers coming up with some incredible ways to ensure that many products can survive the most difficult situations. One area where durability is absolutely essential is in designing weaponry. In the industry, lapses in quality can lead to death. Designers of military vehicles have recently made great strides in creating some extra tough bulletproof vehicles. Researchers were inspired by the advances made with a similar technology, bulletproof vests. This equipment, which keeps police officers and soldiers protected from gunfire, has been continually upgraded as time has gone on. In order to get tougher, these vests have got lighter, so officers and soldiers can move more freely while working. Beautiful screens, a fast computer processor, and the latest software are probably the biggest concerns for most people shopping for new smartphones. Yet, since most mobiles will be subject to their fair share of bumps and bruises during their life cycle, durability should also be a major concern. A major breakthrough in recent years was the invention of Gorilla Glass. This technology not only prevents devices from breaking when dropped on hard surfaces, but it also makes them scratch-resistant as well. Gorilla Glass screens are given molten alkaline salt baths that produce a hard, compressed layer at the surface. Before a screen can crack, it will have to penetrate this rugged surface, which takes a large degree of force. Recently, another new technique called electrospinning was developed that could make future products even tougher to break. The process involves applying high voltage to a polymer to create a strand of nanofiber. Products designed with the material will be able to absorb more energy without breaking. Researchers are aiming to lighten up aircraft and potentially decrease the damage planes suffer in crashes. Hopefully, these advances are just the beginning. Although science has come a long way in helping manufacturers to create more durable products, the next century should surely bring some even more incredible improvements.
4. The word “it” in paragraph 3 refers to ________

Find the word which has a different sound in the part underlined

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An Amazing Invention
Look at your hand, and it might not seem very interesting at first, but it is an amazing tool. In fact, the human hand is as complex and as useful as a high tech machine. This might sound strange to you, but the development of the human hand changed the world. For example, the thumb helped human beings become the smartest and most powerful animals on the Earth. Your thumb is important because it faces your other fingers. This allows you to hold things, like tools. Being able to hold tools allowed our ancient ancestors to build things and become more advanced. It is also possible that when we developed thumbs and started to use tools, our brains developed faster as well. And how about this? Your fingers are the only parts of your body that are moved by a “remote control”. A remote control is the small device that you use to change the channel on your television. Your fingers are controlled by remote because they don’t have any muscles. You control your fingers with the muscles in your palms. The palms are connected to the fingers by tendons. The palms pull the tendons, and move them the same way a string moves a puppet. Every part of the human body is complicated, but the hand is especially complicated. It has a total of 29 bones. There are 34 different muscles that move the fingers and the thumb. Seventeen of those muscles are in the palm, and 18 are in the forearm. The human hand also has 48 nerves and 30 arteries. An artery is like a vein, but it carries blood away from the heart. Human beings are not as strong or as fast as other animals. However, our ancient ancestors were able to rule the world for two reasons.  First, they were intelligent. Second, they had these amazing instruments called hands. There is no other invention like them in the world. 
6. What does the last sentence of the last paragraph mean?

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The Power of Crowdsourcing
There is a famous old saying that when trying to solve a problem “two heads are better than one”. Yet until recently, businesses would often rely on one key person to get important tasks done. But thanks to a phenomenon called crowdsourcing, more and more companies are allowing their consumers to have their say when designing new products. The term “crowdsourcing” refers to the process of outsourcing jobs which were once done by a single person to a large group (or a crowd) of people. In the past, crowdsourcing wasn’t practical, as it was impossible to gather thousands of like-minded people together to share opinions. Now, thanks to the Internet, online forums, and social media, this isn’t a difficult task at all. There are many important applications for crowdsourcing in business. For example, if a small business was looking to develop a business logo, it might employ a single designer and hope for the best. However, with crowdsourcing, companies can specify some guidelines about their project, set a budget, and start a design contest online. Within hours, it will likely receive hundreds of designers sending them logos. In the end, they can choose the design they like best and the winner will get compensated. Crowdsourcing has other applications as well. A website called Duolingo is using crowdsourcing to translate documents into different languages. It offers free lessons to language learners. As part of their tests, users translate lines to test their knowledge. Then, a computer programme will analyze thousands of test results for consistency and arrange an accurate translation. Not everyone is sold on crowdsourcing, though. In many cases, it may be better to rely on the opinion of a few specialized professionals than information from a crowd. For instance, it makes more sense to trust the opinion of one top doctor than to take the advice of 1,000 random people regarding a health issue. Another criticism is the low wage that crowdworkers usually receive. Since crowdworkers are freelancers and not employees, they can be paid less than minimum wage. Whether you love or hate crowdsourcing, it appears to be here to stay. So before you make any financial judgements, consider following the crowd and give crowdsourcing a try.
2. One of the advantages of using crowdsourcing is __________

Chọn câu đồng nghĩa với câu trên:
“You have just got a promotion, haven’t you? Congratulations!” Peter said to his friend.

Choose the best answer:
The Red Bull team is considered as __________ finalist of the two teams.

Rewrite the sentence
My smart phone is so convenient that I bring it everywhere.

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:
Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful. Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design - glass represents a major achievement in the history of technological developments.
Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.
Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or "freeze" at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

The words "exposed to" in paragraph 2 most likely mean     .

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Want to discover the latest trends in International Business? Sign up for our free workshops, to be held October 2-6. Register now online! Starting Sept. 1, employees will be able to access a new workshop registration system at www.employeetraining.com. To enter the site, a staff ID number and password are required. If you don't already have these, contact your immediate supervisor. Employees are encouraged to sign up early for workshops, as the number .of participants is….(1)…. to 50 per session. Provided that seats remain available, employees can easily register for sessions. If a session is …(2)…., however, staff can request that they be contacted if a space opens up. The upcoming sessions…...(3)….. on the 5th floor of the Stafford Suite building

Read the following passage and choose the best answer (A, B, C, D):
Alemur is a unique animal. When you look at a lemur, it might be hard to tell what you are really looking at. With their huge dark eyes and lush fur, lemurs are very cute, but what animal family are they from? Some lemurs look like a cross between a cat and a dog. Some look a little like squirrels, while others resemble monkeys. Why do they look so strange? To answer to this question we need to understand the lemur's history and genetics. In modern biology, lemurs are called prosimians. This means before monkeys. Remarkably, lemurs, monkeys, apes, and humans all share a common ancestor from about 50 million years ago. Monkeys, apes, and humans developed together in one direction. However, lemurs developed differently and slowly because of their geographical location. All lemurs come from the island of Madagascar, located off the east coast of Africa. Madagascar split off from mainland Africa 50 million years ago. It is believed that the first prosimians traveled to Madagascar on floating trees and plants. The prosimians that traveled to Madagascar were isolated from the rest of Africa. Predators, like dogs or cats, did not make it to Madagascar. Since there were no dangerous threats, prosimians did not have to evolve as quickly as other primates did. (primates: any nimal that belongs to the group of mammals that includes humans, apes, and monkeys.) Over time, the original prosimians evolved into lemurs. Lemurs have changed in some ways over those 50 million years, but they are much more similar to our shared ancestor than either humans, monkeys, or apes. Because of this, their bodies and behaviors hold clues about what out common ancestor looked like. Lemurs have four fingers and a thumb on their hands, and five toes on their feet, just like humans do. They have eyes and jaw bones that are similar to humans as well, but they have a wet nose, like a dog. Lemur behavior is also comparable to human behavior, as they live in social groups. Like apes and humans, lemurs travel together, groom one another, fight each other, and play together. Lemurs, however, have simpler friend and family relationships. Recently, lemurs have been studied in captivity. Like their distant chimpanzee and monkey cousins, they can be taught to use tools and to solve complicated problems. The word lemur means ghost. While the name probably comes from their huge reflective eyes and their strange, haunting cries, lemurs are ghosts in a way. They are living ghosts that remind US where we came from, and also give US clues about how humans evolved.
7. Paragraph 4 States, "they are much more similar to our shared ancestor than either human, monkeys, or apes". What do you think the reason is?

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Traveling in the Future
These days, if you want to travel from New York to Beijing, the flight takes about 16 hours. You also have to wait at the airport, and sometimes you have to transfer onto a different airplane. If you add all of that extra time, the trip takes at least 20 hours. But in the future, the trip from New York to Beijing might only take two hours. Right now, a private company is developing something called ET3. ET3 stands for “evacuated tube transport technology”. Here is how it works. A tube goes all the way from New York to Beijing. The tube is only a few meters wide. Capsules move through the tube. Six people can sit in one capsule. The capsules use electricity instead of gasoline. For international travel, the capsules can travel at about 6,500 kilometers per hour. That is much faster than airplane – most modern airplanes usually only fly at about 800 kilometers per hour. So how is this possible? How can these capsules travel so fast? The answer is that there is no air inside the tube. When airplanes fly, they have to move through the air. The air slows the airplanes down. Because there is no air in the ET3 tubes, the capsules are able to move at a very high speed. Besides, the capsules are quite light. They only weigh 183 kilograms. There are other advantages to ET3. Because it uses electricity, it is quite clean. In addition, it is much quieter than airplanes and cars. Finally, ET3 tubes and capsules don’t require very much building material. Of course, ET3 doesn’t exist yet. The technology is still being developed. Developers still have to solve a lot of problems. The biggest problem is that right now, ET3 would be far too expensive. In order to make ET3 cheaper, we will need much better technology. It is exciting to think of how ET3 will change travel in the future. Maybe someday, you will be able to have lunch in New York and dinner in Beijing.
4. All of the following are factors that make ET3 travel fast EXCEPT that _________

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Mrs. Pike was so angry that she made a ______ gesture at the driver.

(215)____

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.
                      MODERN SCIENCE
It seems entirely natural to us that there are teams of scientists in universities and (1)............. institutions around the world, attempting to discover the way the world works. (2).............. , it hasn’t always been that way. Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could (3)............ the cause of natural events just by the power of thought. During the 17th century, more and more people began to realize that they could test their scientific ideas by designing a relevant experiment and seeing what happened. A lot of (4)......... was made in this way by individual scientists. These men and women often worked alone, carrying out research into many different areas of science, and they often received very little (5).............. for their hard work. At the start of the 20th century, though, it became clear that science was becoming more complicated and more expensive. The individual scientists disappeared, to be replaced by highly qualified teams of experts. Modern science was born.
(5).........................

Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
She is an honest person. She is also a very friendly one.