SEATTLE (May 1 ) – Researchers at technology firm Nylobe, Inc., are working to develop a sensor capable of detecting corrosion caused by environmental exposure. Corrosion is a major contributor to ---143--- losses in the aircraft industry each year. "This will be a major ---144--- for commercial airline fleets," says Mel Laveau, Nylobe's CEO. "The sensor will decrease both labor and maintenance costs   without being too expensive."
According to Ms. Laveau, the sensor will work by detecting corrosion in its early stages, when the problem can be corrected simply by removing the corroded material. ---145---. In the structure of large aircraft, some critical joints can be particularly susceptible to corrosion. ---146---, the sensor can be used to inspect these areas and then target the most likely areas of concern.

144.....................

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All / subjects / my/ new/ school/ interesting.

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“Don’t stay up too late, my son”, he said.

Fill in each numbered blank with one suitable word or phrase.

The Early Life of Bill Gates

While Bill Gates had to work (1)………..to become what he is today, his story isn’t exactly a rags-to-riches one as he was born into a fairly wealthy family. His father was a successful attorney while his mother was a school teacher who went onto a member of the Board of Directors of the First Interstate Bank. Gates was a bright student and (2) ……….well academically, especially in mathematics. And, this was exemplified by the 800 points that young Bill Gates scored in the mathematics part of an intelligence test.

Bill Gates developed a (3) ………..for computers and programming as early as 13. At the same age, Gates enrolled in the Lakeside School, a private preparatory school. While Gates was still at the school, the school administration decided to buy a computer from the General Electric Company. (4) ………his flare in programming, the school administration excused Gates from classes to allow him to (5) ………….his interest. On the GEC machine, Bill Gates built his first ever computer program.

At the school, Gates met Paul Allen and they worked (6)………..to find bugs in a system belonging to Computer Center Corporation. In exchange for computer time and royalties, Gates and Allen along with two other students wrote a payroll program for Information Sciences. This led to Gates’ school becoming fully aware (7)………..his talent and they had him build a program (8)………..scheduled students in classes.

Gates and Allen continue to build software and at just the age of 15, Bill Gates sold a software to optimize traffic for $$ 20,000. A few years later, he developed another software and earned $$ 30,000 from (9)...... And, this was the start of Bill Gates’ journey to a billion-dollar (10)…………..

(9)……….

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“Why did you buy these oranges? ” “They were ……….….. I could find. ”

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He lives in a very ............... village in Hue.

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Spending all the time studying is ________ .

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

The Emergence of Megacities

The urban shift over time has led to the emergence of the megacity – a city with a population of 10 million or more. New York City and Tokyo were the first (21)______megacities, both (22)________an urban population of over 10 million by the 1950s. But today they are (23)_________alone in their size. In 2014, there were 28 megacties across the planet – from Sao Paulo, Brazil to Lagos, Nigeria and London, England to Shanghai, China – and all major global regions except Oceania are (24)_______with megacities.

Most of the megacities in recent years are located in Asia and Africa. In fact, it is where seven of wight newest megacities can be found and where 10 of the 12 (25)_________megacities in 2030 will be located. From 2010 to 2015, Kinshasa’s population grew (26)________   over 23 percent, and today over half of 11.6 million residents are under 22 years old. A (27)________of factors has led to this growth including migration from rural areas, high fertility rates, and widening of the city’s boundaries. The population is (28)________almost all support structure in the city (29)_______the threat of food shortages, traffic (30)__________, and insufficient education facilities have become an obvious reality.

Question 21: ..............

______the book again and again, I finally understood what the author meant.

(147)_______

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I love learning about _________ life under the sea.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Synchronised swimming or (1) _______ swimming used to be known as 'water ballet'. This is because the routines are essentially a series of athletic movements choreographed to a piece of chosen music, so synchronised swimming is like a staged ballet (2) _______ is in the water. Synchronised swimming is highly challenging, requiring ease of movements and the ability to stay upside down in water. (3) _______ , it is said to be as hard to practice as it is beautiful to watch. A test even for strong swimmers, the sport requires advanced water skills, strength, flexibility, endurance, grace, precise timing, artistry and exceptional breath control. There are a (4) _______ of competitive categories in synchronised swimming: solo, duet, trio, team, combination and figures. There are two categories available to compete in the SEA Games. The first one is duet and (5) _______ is team.

Read the following passage and choose the best answer (A, B, C, D):
Teaching English as a foreign language can be a great way to travel the world and earn money at the same time. However, some graduates actually like idea of (1) _______  a career in teaching English, and there are numerous courses at various levels, from the basic certificate to the Diploma or even the master’s. To find the right course, a good place to start is TEFL.com – an internet site with lots of relevant information and helpful (2)_______  including a full list of places in the UK offering courses. The site also offers assistance to qualified graduates (3)_______  finding work. When deciding a full list of places, what to do is to look at what your needs are. If you want a career in leaching English, then definitely find one designed for that (4) _______  , such as an MA or diploma; but if you want to travel around the world, then do a shorter course that will supply you with teaching skills. Some countries will employ people without a teaching qualification as long as the teacher is a (5) _______ speaker of English. However, most countries now expect a qualification. It is advisable to make sure that the course that you want to do is recognized and that it includes a period of teaching practice. This is important in preparing people to be English language teachers

Read the passage below carefully, and then choose the best answer:
Flying Drones into Danger Zones
A plane is sent deep into the enemy territory with a deadly mission. It is assigned to eliminate several key targets with a precision bombing campaign. This mission won’t be easy, however, as to be successful, the plane will have to avoid enemy rockets and tank fire. There will be no risk to the life of the “pilot” of the plane because he will not be able to aboard the vessel. Instead, he will be thousands of miles away inside a control tower, as he is operating a drone. Drones, which are also called UVAs or unmanned aerial vehicles, marked a major step forward in technology. Inventors have been working on them since the early 1900s. Although some devices were designed back then, they weren’t able to do much more than a standard model airplane. In fact, it was not until a US plane was shot down in 1959 during the Cold War that the US military really got serious about drones. The aim was to save pilots’ lives while flying over hazardous territories. Drones usually fall into two categories. The first type of drones relies on human control from a remote location. The second type of drones is pre­programmed with computer instructions, and it then completes its mission operating autonomously. In addition to protecting pilots’ lives, drones also have several other advantages. They can stay in the air for longer periods of time because there is no concern for eating, sleeping, or rest breaks that pilots typically require. Drones can also be produced cheaper since manufacturers don’t need to value safety precautions as they would for aircraft flown by humans. Despite their usefulness, military drones have been the cause of great criticism over the past decade. There have been cases of British and American drones missing their targets and killing innocent civilians instead. The Brookings Institution released a statistic that for every military leader who is killed by a drone strike, ten civilians die. Some suggest that if human pilots were flying these planes, they wouldn’t have made these errors. Drones don’t always have targets that they must eliminate. The military also employs special surveillance drones that use long-range cameras to gather information about buildings, enemy soldier formations, and other vital information from the ground. In the end, whether people are for or against the use of drones, it appears that they are certain here to stay.
1. How are drones mainly different from regular planes?

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions:
    Who talks more - men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has the studied the communication style of men and women, says that this is a stereotype. According to Tannen, women are more verbal - talk more - in private situations, where they use conversation as the “glue’ to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these difference even in children. Little girls often play with one ‘best friend’ and their play includes a lot of conversation. Little boys often play games in groups, their play usually involves more doing than talking. In school, girls are often better at verbal skills, while boys are often better at mathematics.
    A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children aged 3-6 and their parents. They found evidence that parents talk very differently to their sons than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters, they use more descriptive language and more details. There is also far more talk about emotions, especially with daughters than with sons.

Which word is similar in meaning to the word “glue” ?

Choose the best answer:
I asked her if she______the following exam.

Rewrite the sentence:
No mount in the world is higher than Mount Everest.

Rewrite sentences without changing the meaning
 “Go home.” said the teacher to us.

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:
The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.
Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

According to the passage, all of the following statements about plaque are true EXCEPT     .

Choose the best answer
Let ________ stay at home and watch TV.

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 :
It was once thought that forests and the wood that could be taken from them were in endless supply. Especially in areas like South America, where vast areas of the continent were covered by rainforests, logging and clearing of forests for farming seemed like a harmless endeavor. (1)__________ the clearing of rainforests been kept in moderation, it may have become a stable source of wood and a(n) (2)_________ for the people in the region. It was not, though, and the amount of damage that has been (3)__________ to the entire planet has been terrible because of the clearing of rainforests. The rainforests are considered the lungs of the world because they breathe in carbon dioxide and breathe out oxygen. We need the oxygen to survive, and the more we clear rainforests, the more carbon dioxide begins to concentrate in the atmosphere. In addition to the clearing of forests, the burning of fossil fuels for energy (4)__________ more carbon dioxide to the atmosphere. It makes the problems of global warming get worse, as we keep adding more carbon dioxide while simultaneously taking away the planet’s (5)___________ to deal with this gas.

Read the following passage and choose the best answer (A, B, C, D):
Aspirin's origins go back at least as early as 1758. In that year, Englishman Edward Stone noticed a distinctive bitter flvor in the bark of the willow tree. To Stone, this particular bark seem to have much in common with "Peruvian Bark", which had been used medicinally since the 1640s to bring down fevers and to treat malaria, stone decided to test the effectiveness of the willow bark. He obtained some, pulverized it into tiny pieces, and conducted experiments on its properties. His tests demonstrated that this pulverized willow bark was effective both in reducing high temperatures and in relieving aches and pains. In 1763, stone presented his tiding to the British Royal Society. Several decades later, further studies on the medicinal value of the willow bark were being conducted by two Italian scientists. These chemists, Brugnatelli and Fontana, determined that the active chemical that was responsible for the medicinal characteristics in the willow bark was the chemical salicin, which is the active ingredient of today's aspirin. The name "aspirin" is the trade name of the drug based on the chemical salicin, properly known as acetylsalicylic acid.The trade name "aspirin" was invented for the drug in the 1890s by the Bayer Drug Company in Germany. The fist bottles of aspirin actually went on sale to the publicjust prior to the turn of the century, in 1899.
1. According to the passage, aspirin originated: