A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometres in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the tune it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word "radar" in fact gets its name from the term "radio detection and ranging". "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots radar is essential for air traffic control tracking ships at sea, and for tracking weather Systems and storms.

 According to the passage, what can radar detect besides location of objects?

 

Read the following passage and choose the best answer (A, B, C, D):
The Greenbox emerged as Ireland’s first and most successful integrated ecotourism destination with a set of standards based on sound environmental practices highlighting all (1) ____ the region and its people had to offer. The Greenbox aimed to deliver environmentally sustainable tourism products, accommodation and attractions. Such tourism activity would have minimal impact (2) ____ the ecology of the area, be of maximum benefit to the local communities and (3) ____ the needs of the environmentally conscious visitor. The Greenbox encompassed an area covering all of Leitrim and Fermanagh and parts of Donegal, Sligo and Cavan. The Greenbox promoted travel which is small scale, low impact, culturally sensitive and community orientated, and provided a marketing tool for businesses that were grounded in sustainable principles and (4) ____ within the Greenbox area. The concept was broader than (5) ____ established definition of tourism, embracing activities such as organic food production, rural transport, energy and waste management

Read the following passage and choose the best answer (A, B, C, D):
Green-space facilities are contributing to an important extent to the quality of the urban environment. Fortunately it is no longer necessary that every lecture or every book about this subject has to start with the proof of this idea. At present, it is generally accepted, although more as a self-evident statement than on the base of a closely-reasoned scientific proof. The recognition of the importance of green-spaces in the urban environment is a first step on the right way; this does not mean, however, that sufficient details are known about the functions of green-space in towns and about the way in which the inhabitants are using these spaces. As to this rather complex subject I shall, within the scope of this lecture, enter into one aspect only, namely the recreative function of green-space facilities. The theoretical separation of living, working, traffic and recreation which for many years has been used in town-and-country planning, has in my opinion resulted in disproportionate attention for forms of recreation far from home, whereas there was relatively little attention for improvement of recreative possibilities in the direct neighbourhood of the home. We have come to the conclusion that this is not right, because an important part of the time which we do not pass in sleeping or working, is used for activities as possible, and the design of these has to be such that more obligatory activities can also have a recreative aspect. The very best standard of living is nothing if it is not possible to take a pleasant walk in the district, if the children cannot be allowed to play in the streets, because the risks of traffic are too great, if during shopping you can nowhere find a spot for enjoying for a moment the nice weather, in short, if you only feel yourself at home after the street-door of you house is closed after you.  
5. The author suggests that the recreative possibilities of green-space should be provided ____

Read the following passage and choose the best answer (A, B, C, D):
A new report by the Pew Research Center has provided more documentation on the growing popularity of audiobooks. In a survey of 1,502 American adults conducted from January 8 to February 7 this year, Pew found that 20% of adults listened to an audiobook in the 12 months prior to the period in which the survey was conducted. In 2011, only 11% of them said they listened to an audiobook. The strongest gains have come since 2016—the dawning of the digital audiobooks age. The percentage of adults listening to audiobooks rose six percentage points between 2016 and the 2019 survey, after rising only three percentage points between 2011 and 2016. According to Pew, since 2018, college students and adults with household incomes over $75,000 are the two groups who have adopted listening to audiobooks the quickest. The Pew survey also found that while listening to audiobooks has risen steadily since the 2016 survey, reading e-books had declined. Twenty-eight percent of adults reported reading an e-book in 2016—double the number who listen to audiobooks that year. By the most recent survey, ebooks had only a 5% edge over audiobook usage. Overall, the Pew survey found a gradual reduction in the percentage of Americans who are reading. In 2011, 79% of those surveyed said they had read a book in the previous 12 months, a number that fell to 72% in early 2019. Print remained by far the book format of choice, with 65% or adults surveyed reporting that had read a print book within the last year, down from 71% in 2011. The percentage of adult who read a book in any format fell from 79% in 2011 to 72% in 2019.  
1. Which best serves as the title for the passage?

Read the following passage and choose the best answer (A, B, C, D):
In the past, technology and progress was very slow. People “invented” farming 12,000 years ago but it took 8,000 years for the idea to go around the world. Then, about 3,500 years ago, people called “potters” used round wheels to turn and make plates. But it took hundreds of years before some clever person thought, if we join two wheels together and make them bigger, we can use them to move things. In the last few centuries, things have begun to move faster. Take a 20th-century invention like the aeroplane, for example. The first aeroplane flight on 17 December 1903 only lasted 12 seconds, and the plane only went 37 metres. It can’t have been very exciting to watch, but that flight changed the world. Sixteen years later, the first plane flew across the Atlantic, and only fifty years after that, men walked on the moon. Technology is now changing our world faster and faster. So what will the future bring? One of the first changes will be the materials we use. Scientists have just invented an amazing new material called grapheme, and soon we will use it to do lots of things. With grapheme batteries in your mobile, it will take a few seconds to charge your phone or download a thousand gigabytes of information! Today, we make most products in factories, but in the future, scientists will invent living materials. Then we won’t make things like cars and furniture in factories - we will grow them! Thirty years ago, people couldn’t have imagined social media like Twitter and Facebook. Now we can’t live without them. But this is only the start. Right now, scientists are putting microchips in some disabled people’s brains, to help them see, hear and communicate better. In the future, we may all use these technologies. We won’t need smartphones to use social media or search the internet because the internet will be in our heads! More people will go into space in the future, too. Space tourism has already begun, and a hundred years from now, there may be many hotels in space. One day, we may get most of our energy from space too. In 1941, the writer Isaac Asimov wrote about a solar power station in space. People laughed at his idea then, but we should have listened to him. Today, many people are trying to develop a space solar power station. After all, the sun always shines above the clouds!  
2. Why does the writer use the example of the aeroplane?

Choose the best answer:
The government knows the extent of the problem. The government needs to take action soon.

Rewrite the sentence:
He has been living with his cousin for two months, but he's looking for a place close to his university.

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 from 31 to 35.

Many people see fad diets as harmless ways of losing weight, and they are grateful to have them. Although permanent weight loss is the (31)_________, few are able to achieve it. Experts estimate that 95 percent of dieters return to their starting weight, or even gain weight. While the reckless use of fad diets can bring some (32)_________results, long-term results are very rare. (33) _________, people who are fed up with the difficulties of changing their eating habits often turn to fad diets. (34)_________being moderate, fad diets involve extreme dietary changes. They advise eating only one type of food, or they prohibit other types of foods entirely. This results in a situation (35)_________a person's body doesn't get all the vitamins and other things that it needs to stay healthy

(35)........................................

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
Being aware of one's own emotions - recognizing and acknowledging feelings as they happen - is at the very heart of Emotional Intelligence. And this awareness encompasses not only moods but also thoughts about those moods. People who are able to monitor their feelings as they arise are less likely to be ruled by them and are thus better able to manage their emotions.
Managing emotions does not mean suppressing them; nor does it mean giving free rein to every feeling. Psychologist Daniel Goleman, one of several authors who have popularized the notion of Emotional Intelligence, insisted that the goal is balance and that every feeling has value and significance. As Goleman said, "A life without passion would be a dull wasteland of neutrality, cut off and isolated from the richness of life itself." Thus, we manage our emotions by expressing them in an appropriate manner. Emotions can also be managed by engaging in activities that cheer us up, soothe our hurts, or reassure us when we feel anxious.
Clearly, awareness and management of emotions are not independent. For instance, you might think that individuals who seem to experience their feelings more intensely than others would be less able to manage them. However, a critical component of awareness of emotions is the ability to assign meaning to them - to know why we are experiencing a particular feeling or mood.
Psychologists have found that, among individuals who experience intense emotions, individual differences in the ability to assign meaning to those feelings predict differences in the ability to manage them. In other words, if two individuals are intensely angry, the one who is better able to understand why he or she is angry will also be better able to manage the anger.
Self-motivation refers to strong emotional self-control, which enables a person to get moving and pursue worthy goals, persist at tasks even when frustrated, and resist the temptation to act on impulse. Resisting impulsive behavior is, according to Goleman, "the root of all emotional self- control."
Of all the attributes of Emotional Intelligence, the ability to postpone immediate gratification and to persist in working toward some greater future gain is most closely related to success - whether one is trying to build a business, get a college degree, or even stay on a diet. One researcher examined whether this trait can predict a child's success in school. The study showed that 4-year-old children who can delay instant gratification in order to advance toward some future goal will be “far superior as students” when they graduate from high school than will 4-year-olds who are not able to resist the impulse to satisfy their immediate wishes.

Which of the following can we infer from paragraph 1?

Read the following passage and choose the best answer (A, B, C, D):
If you go back far enough, everything lived in the sea. At various points in evolutionary history, enterprising individuals within many different animal groups moved out onto the land, sometimes even to the most parched deserts, taking their own private seawater with them in blood and cellular fluids. In addition to the reptiles, birds, mammals and insects which we see all around us, other groups that have succeeded out of water include scorpions, snails, crustaceans such as woodlice and land crabs, millipedes and centipedes, spiders and various worms. And we mustn’t forget the plants, without whose prior invasion of the land, none of the other migrations could have happened. Moving from water to land involved a major redesign of every aspect of life, including breathing and reproduction. Nevertheless, a good number of thoroughgoing land animals later turned around, abandoned their hard-earned terrestrial re-tooling, and returned to the water again. Seals have only gone part way back. They show us what the intermediates might have been like, on the way to extreme cases such as whales and dugongs. Whales (including the small whales we call dolphins) and dugongs, with their close cousins, the manatees, ceased to be land creatures altogether and reverted to the full marine habits of their remote ancestors. They don’t even come ashore to breed. They do, however, still breathe air, having never developed anything equivalent to the gills of their earlier marine incarnation. Turtles went back to the sea a very long time ago and, like all vertebrate returnees to the water, they breathe air. However, they are, in one respect, less fully given back to the water than whales or dugongs, for turtles still lay their eggs on beaches. There is evidence that all modern turtles are descended from a terrestrial ancestor which lived before most of the dinosaurs. There are two key fossils called Proganochelys quenstedti and Palaeochersis talampayensis dating from early dinosaur times, which appear to be close to the ancestry of all modern turtles and tortoise. You might wonder how we can tell whether fossil animals lived in land or in water, especially if only fragments are found. Sometimes it’s obvious. Ichthyosaurs were reptilian contemporaries of he dinosaurs, with
fins and streamlined bodies. The fossils look like dolphins and they surely lived like dolphins, in the water. With turtles it is a little less obvious. One way to tell is by measuring the bones of their forelimbs.
7. What does the word “they” in the last paragraph refer to?

Stop Pollution Now!

Pollution is a really big problem on our planet and it must (1) …. immediately. It must be stopped before our planet goes extinct. There are three main reasons, in my opinion, why pollution should be stopped.

The first reason why we should stop pollution is that pollution is destroying the environment we live in. Carbon dioxide is a big (2) ……….. to pollution. Carbon dioxide affects our climate in many different ways. The way it works is that certain ‘greenhouse gases’ can't escape (3) …….. our atmosphere because they get trapped. The second reason why we should stop pollution is that it also has an influence on us – (4) ……….. Pollution also influences human life and that is a big problem. According to the World Health Organization, indoor air pollution from the burning of coal or biomass fuels like wood risks lives of millions of people. Air pollution causes two million deaths per year, mostly from heart disease and respiratory disorders (5) …….. infections and lung cancer.

The third reason why we should stop pollution is that (6) …………. we do, we can live longer on this planet. If we don’t stop pollution and global warming, something really bad will happen (7) ….. us. Humans have destroyed the planet so quickly. We can live longer and extent our existence on this planet so that our children’s children can live in a planet without worries. In short, pollution must be stopped immediately. The earth is our only home and we must protect it and take care of it as much as we can. Pollution must be stopped before we (8) ………. our planet.

et.

(8) …......

Read the passage carefully, then choose the correct answers.

The dramatic growth of the world's population in the twentieth century was on a scale without parallel in human history. Most of this growth had occurred since 1950 and was known as the population 'explosion'. Between 1950 and 1980 the world population increased from 2.5 to over 4 billion, and by the end of the twenty century the figure had risen to about 6.6 billion. Growth of this size cannot continue indefinitely. Recent forecasts suggest that the total population will level out at between 10 and 15 billion in the mid twenty first century. Already there are encouraging signs that the rate of increase in many less developed countries is beginning to slow down.

In 2000, the world's population was about ______.

Read the following passage and choose the best answer (A, B, C, D):
Automated manufacture arose out of the intimate relationship of such economic forces and technical innovations as the division of labor, power transfer and the mechanization of the factory, and the development of transfer machines and feedback systems as explained below. The division of labor (that is, the reduction of a manufacturing or service process into its smallest independent steps) developed in the latter half of the 18th century and was first discussed by the Scottish economist Adam Smith in his book An Inquiry into the Nature and Causes of the Wealth of Nations (1776). In manufacturing, the division of labor results in increased production and a reduction in the level of skills required of workers. Mechanization was the next step necessary in the development of automation. The simplification of work made possible by the division of labor also made it possible to design and build machines that duplicated the motions of the worker. As the technology of power transfer evolved, these specialized machines were motorized and their production efficiency was improved. The development of power technology also gave rise to the factory system of production, because all workers and machines had to be located near the power source. The transfer machine is a device used to move a workpiece from one specialized machine tool to another, in such a manner as to properly position the workpiece for the next machining operation. Industrial robots, originally designed only to perform simple tasks in environments dangerous to human workers, are now extremely dexterous and are being used to transfer, handle, and index (that is, to position) both light and heavy workpieces, thus performing all the functions of a transfer machine. In actual practice, a number of separate machines are integrated into what may be thought of as one large machine. In the 1920s the auto industry combined these concepts into an integrated system of production. The goal of this assembly-line system was to make automobiles available to people who previously could not afford them. This method of production was adopted by most automobile manufacturers and rapidly became known as Detroit automation. Despite more recent advances, it is this system of production that most people think of as automation.
2. Which of the following is TRUE according to the passage?

Read the passage and choose the best answer from 55 to 64.

Of the six outer planets, Mars, commonly called the red planet, is the closest to Earth. Mars, 4,200 miles in diameter and 55 percent of the size of Earth, is 34,600,000 miles from Earth, and 141,000,000 miles from the Sun. It takes this planet, along with its two moons, Phobos and Deimos, 1.88 years to circle the Sun, compared to 365 days for the Earth.

For many years, Mars had been thought of as the planet with the man-made canals, supposedly discovered by an Italian astronomer, Schiaparelli, in 1877. With the United States spacecraft Viking I's landing on Mars in 1976, the man-made canal theory was proven to be only a myth.

Viking I, after landing on the soil of Mars, performed many scientific experiments and took numerous pictures. The pictures showed that the red color of the planet is due to the reddish, rocky Martian soil. No biological life was found, though it had been speculated by many scientists. The Viking also monitored many weather changes including violent dust storms. Some water vapor, polar ice, and permafrost (frost below the surface) were found, indicating that at one time there were significant quantities of water on this distant planet. Evidence collected by the spacecraft shows some present volcanic action, though the volcanoes are believed to be dormant, if not extinct.

Mars has been nicknamed___________________ .

Each sentence has a mistake. Findit by chosing A B C or D

Affecting by the Western cultures, Vietnamese young people’s attitudes towards love and marriage hava dramatically changed

Read the following passage and choose the best answer (A, B, C, D):
Researchers have found out that the size of an animal is important when it comes to extinction. Scientists have determined that the biggest and the smallest animals are more (1) ________ risk of dying out than medium-sized animals. Heavy animals are mostly endangered by hunting and poaching while the smallest creatures may die out (2)_______their living area is being polluted. Among the most endangered animals are elephants, lions and rhinos. Public awareness is large and campaigns to save such animals have been around for a long time. It is the smallest (3) __________ that get the least attention. Especially fish and frogs are in danger of dying out. The species that are most at risk have a weight of over 1 kilogram. They are in danger of being (4)__________ because we need food, skin and other items. According to the study, animals that are (5) __________ extinct affect large ecosystems, like forests, deserts and oceans

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

Ballad, like folk tales, began thousands   of years ago among people who could not read or writing

Read the following passage and choose the best answer (A, B, C, D):
The past fifty years or so have seen the gradual disappearing of animals from this earth, fishes from the sea, trees and plants from the land. Many factors result in this unpleasant phenomenon. Among them, hunting is the main factor that endangers wildlife. Some people kill wildlife for sport. They take pleasure in collecting heads and hides. Yet others specialize in commercial hunting like killing whales. Apart from this, the rapidly growing human population threatens wildlife on land, too. Towns expand and roads have to be built, so forests are burnt and trees are chopped down. It seems that man needs every inch of land within his reach, so he moves on to the natural habitat of wildlife. Tigers, lions and leopards slowly die off without the food and shelter that the forests provide. In addition, rapid urbanization means industrial expansion. Very often, poisonous chemicals, industrial wastes and oil are dumped into the rivers and seas. Fish and birds are threatened. Man depends greatly on animals for survival. He needs their flesh, hides and furs. Thus, man cannot do without wildlife; or he himself would become extinct. The public should be made aware that it would be better to shoot the animals with a camera than with a gun. In this way, they can preserve and help wildlife to continue living rather than to remove all signs of it. Man must learn to farm the sea as he does the land. He should regulate the amount and the frequency of his catch. He should allow fish to breed and multiply before netting them. Man also needs to build forest reserves, and to pass laws prohibiting the killing of animals, especially those that are already rare. To retain the present animal kingdom, the least that man can do is to clean the seas and rivers and to prevent pollution. The cycle of nature is such that it forms a vicious circle. The insecticides and pesticides that we spray on crops can kill the birds and animals that feed on them. When man eats these poisoned animals, he himself can die. We must therefore test the chemicals to be used before they are sprayed or it might mean the death of man!
4. The phrase “commercial hunting” in paragraph 2 refers to the kind of hunting for _______

Read the following passage and choose the best answer (A, B, C, D):
Working on the computer is very tough on your body, which is not used to this modern type of work. Sitting has long been known to cause back pain and negatively influence circulation, which can promote cardiovascular disease. Extensive use of the keyboard and mouse can lead to stiffening of the muscles in your hands, arms, and neck, as well as inflammation and injuries. Staring at a bright screen for too long can cause dry eyes and headaches. Finally, computer work can be stressful, isolating, and lead to depression and anxiety. In other words, working on the computer is as unhealthy a job as you can imagine. First and foremost, sitting for long stretches of time is a very serious health risk! Sitting affects your blood circulation, your back experiences a steady stress, you are more likely to drink and eat stuff that isn’t good for you, and you burn very little calories, making it more likely that you overeat. As a result, sitting contributes to a host of conditions, most notably gaining weight, diabetes, heart disease, cancer, and consequently a shortened life span. Second, bad posture causes pain. You can develop bad posture from anything you do habitually, whether it’s sitting, standing, or walking. Your daily activities have an impact on your body and shape your muscles; they either tighten or become weak. The typical consequences associated with bad posture while working on the computer are pain in the back, shoulder, and neck, often resulting in tension headaches. Third, staring at the screen causes eye strain. Staring at a bright screen for hours can lead to eye fatigue or eye strain, headaches, blurred vision, burning, itching or tearing eyes, and temporary vision disorders. Fortunately, eye strain rarely results in a permanent condition and symptoms can be prevented or cured rather easily. Last, but not least, emotional pressure and isolation cause anxiety and depression. Computers are very efficient tools in that they help us with getting more work done in less time. At the same time, you spend less face-to-face time with your colleagues, family, or friends. This can lead to isolation, anxiety, and depression, i.e. both physical and mental health issues. The symptoms are manifold and can include tense muscles, back pain, headaches, poor sleep (insomnia), increased or flat breathing, quickened pulse, and generally signs of stress, depression, or anxiety.  
7. According to the passage, all the mentioned issues are __________ 

Each sentence has a mistake. Findit by chosing A B C or D

 The 22nd Southeast Asian Games really became a festival that impressed sports enthusiasts with its spirit: solidarity, friendship  and prosperous

Read the following passage and choose the best answer (A, B, C, D):
Light-emitting diodes (LEDs) are now considered the future of lighting due to a lower energy requirement to run, a lower monthly price tag, and a longer life than traditional incandescent light bulbs. Nick Holonyak, an American scientist at General Electric, accidently invented the red LED light while trying to create a laser in the early 1960s. As with other inventors, the principle that some semiconductors glowed when an electric current was applied had been known since the early 1900s, but Holonyak was the first to patent it for use as a light fixture. Within a few years, yellow and green LEDs were added to the mix and used in several applications including indicator lights, calculator displays, and traffic lights, according to the DOE. The blue LED was created in the early 1990s by Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura, a group of Japanese and American scientists, and for which they won the 2014 Nobel Prize in Physics. The blue LED allowed scientists to create white LED light bulbs by coating the diodes with phosphor Today, lighting choices have expanded and people can choose different types of light bulbs, including compact fluorescent (CFL) bulbs work by heating a gas that produces ultraviolet light and LED bulbs. Several lighting companies are pushing the boundaries of what light bulbs can do, including Phillips and Stack. Phillips is one of several companies that have created wireless light bulbs that can be controlled via smartphone app. The Phillips Hue uses LED technology that can quickly be turned on or off or dimmed by a flick on a smart phone screen and can also be programmed. The higher-end Hue light bulbs can even be set to a large range of colors (only about sixteen million) and synced with music, movies, and video games. Stack, begun by engineers from Tesla and NASA, developed a smart light bulb using LED technology with a wide range of functions. It can automatically sense the ambient lighting and adjust as needed, it turns off and on via motion sensor when someone enters the room, can be used as a wake up alert, and even adjusts color throughout the day to fit with human’s natural circadian cycles and patterns of natural light. The light bulbs also have a built-in learning program that adapts to inputs given by residents over time. And all of these functions can be programmed or monitored from any smart phone or tablet. It is estimated that Stack smart light bulbs can use about sixty percent less energy than a typical LED light bulb and lasts between twenty and thirty thousand hours depending on the model . These light bulbs are compatible (or soon will be) with many of the options for turning an entire home into a smart home including usage with Amazon Alexa, Google Home, and Apple HomeKit.
8. Which of the following best serves as the title of the passage?