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.

143....................

Read the following passage and choose the best answer (A, B, C, D):
The ubiquitous bar code, developed more than twenty years ago, is not a stagnant product. On the contrary, the technology has been improved so that it can be used more efficiently. Much less expensive than a computer chip, the bar code can hold more information than it had in the past by adding a second dimension to the structure. The bar code consists of a series of parallel vertical bars or lines of two different widths, although sometimes four widths are used, printed in black on a white background. Barcodes are used for entering data into a computer system. The bars represent the binary digits 0 and 1, just like basic computer language, and sequences of these digits can indicate the numbers from 0 to 9, which can then be read by an optical laser scanner and processed by a digital computer. Arabic numbers appear below the code. The traditional bar code has been used to monitor skiers at ski lifts and to determine price and perform inventory control on groceries, drugs, medical supplies, manufactured parts, and library books to name a few. The bar code used on grocery products, introduced in the 1970s, is called a universal product code (or UPC) and assigns each type of food or grocery product a unique code. The five digits on the left are assigned to a particular manufacturer or maker and the five digits on the right are used by that manufacturer to identify a specific type or mark of product. Traditional single dimension bar codes are not readily customizable because there is little extra space. The two-dimensional bar code, with an information density of 1,100 bytes, allows a considerably greater amount of information to be coded than does the traditional bar code, including customized information. [A] It also has built-in redundancy, meaning that the identical information is duplicated on the same code. [B] Therefore, if the code is damaged, it can still be read. [C] The technology even allows pictures or texts to be contained within the code, as well as bar code encryption. [D] The new technology dramatically reduces the errors of the single dimensional bar code and reduces the enormous costs that some companies have reported in the past. 
9. In the past, a common use of the bar code was: 

Choose the best answer:
My teacher asked me if I knew _______ had got that job.

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Scientists ____ on the site found many ancient tools, tombs and pottery, and made some important archaeological discoveries.

Marketing your business can be confusing. Newspapers and magazines are ---135--- useful venues for advertising. ---136---, social media platforms have become even more critical marketing outlets. Kate Wei Communications utilizes both traditional outlets and the latest communication platforms. ---137---. In addition to exceptional print services, Kate Wei Communications has the expertise to help you---138--- your online presence. Why wait? Choose our award-winning firm to strengthen your company's image today!

135................

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
                                                HOME LIFE
"Parents  today  want  their  kids  spending  time  on  things  that  can  bring  them  success,  but (1)......... , we've stopped doing one thing that's actually been a proven predictor of success-and that's household chores," says Richard Rende, a (2)........ psychologist in Paradise Valley, Ariz, and co- author of forthcoming book “Raising Can-Do Kids." Decades of studies show the benefits of chores- academically, emotionally and even professionally. Giving children household chores at an early age (3).................. to build a lasting sense of mastery, responsibility and self-reliance, according to research by Marty Rossmann, professor emeritus at the University of Minnesota. In 2002, Dr. Rossmann analyzed data  from  a  longitudinal study (4)............. followed 84 children across four periods in their lives-in preschool, around ages 10 and 15, and in their mid-20s. She found that young adults who began chores at ages 3 and 4 were more likely to have good relationships with family and friends, to achieve academic and early career success and to be self-sufficient, as (5)........ with those who didn't have chores or who started them as teens. Chores also teach children how to be empathetic and responsive to others' needs, notes psychologist Richard Weissbourd of the Harvard Graduate School of Education.

(1)...................

Read the passage below carefully, and then choose the best answer:
Explosions in the Sky
If you attend a major outdoor event in the evening, whether it is in Paris, Beijing, or New York City, there is a good chance that it will end in a sensational way. After all of the other activities have concluded, the sky will be lit up by a colourful firework display. Although the show may only last for a few minutes, during that time every eye will look on with amazement as they work their magic in the air. Fireworks were invented in the seventh century by the Chinese. They were quickly absorbed into the culture and became a part of many celebratory events and festivals. Eventually, emperors would organize large firework displays to entertain and impress their subjects. Fireworks didn’t become big in Europe until the mid-17th century. People became interested in fireworks after reading accounts from monks and travellers who saw them while in China. Once they did arrive, it was obvious they were there to stay. Fireworks were frequently paired with triumphant classical symphonies to celebrate the end of wars and other great victories. As time went on, the fireworks continued to evolve and get better in many ways. Fireworks now come in every colour imaginable. The colour comes from different chemicals that are placed inside of each firework. Thanks to modern technology, it is also possible to create firework arrangements in the shape of hearts, smiley faces, and even the planet Saturn. This is because of the way that the aerial shells, or casings, of fireworks are constructed. The cases are packed with exploding pellets and a piece of cardboard. The cardboard enables the designers to arrange the pellets in pattern or shape of the object of their choice. The first time this technology was used was in Washington DC, during a celebration to welcome home American troops who fought in the Gulf War. The visual aspect is only part of the reason fireworks are appealing. The sounds that fireworks make also add a healthy dose of excitement to the display. There are several noises that fireworks can make. The most common is the “bang” which sounds a lot like a gunshot. Fireworks can also crackle, hum, and whistle as they streak across the night sky. The world’s largest firework show was held in Kuwait in 2012. 77,282 fireworks exploded during the incredible 64-minute show. But with people’s love for fireworks at an all-time high, who knows how long that record will last?
2. How did fireworks come to Europe?

Choose the best answer:
There is some food ..................... the fridge.

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Neil has passed his examinations, _________ is good news.

Read the passage below carefully, and then choose the best answer:
The Greatest Light Show on the Earth
If you are a fan of amazing visual displays, planetariums around the world offer some entertaining laser-light shows that are often accompanied by popular music. Yet if you want to see the world’s greatest light show, you won’t be able to catch it indoors. Instead, you will have to head to one of the Poles. In certain spots, you will be treated to colourful streaks of light dancing across the sky. This incredible display is the aurora borealis, and every year people from all corners of the globe flock to witness its wonders firsthand. The Aurora Borealis, or Northern Lights, got its official name in 1621. The name combines the name of the Roman goddess of the dawn, Aurora, and the Roman god of the north wind, Boreas. In ancient times, the aurora completely baffled people’s minds, as science was far more primitive than it is today. Nevertheless, they created many myths to explain them. The Vikings believed the lights were the reflection of dead maidens. The Scots thought they were supernatural beings battling in heaven. Meanwhile, Eskimos thought that the lights were dead souls, and when the colours changed, it was their attempt to contact living friends and relatives. It was not until 2008 that a team of scientists from ULCA finally concluded with certainty what the true cause of these dancing light is. The process begins when solar winds carry charged particles from the Sun through space and into the Earth’s atmosphere. When these charged particles enter the Earth’s atmosphere, they are magnetically attracted to the Earth’s poles. During their journey to these points, they come in contact with nitrogen and oxygen atoms in the sky. These collisions are what cause the aurora. The heights at which the collisions occur determine the colours of the individual lights. For example, when the solar winds collide with nitrogen at least than 96 kilometres above the Earth’s surface, the lights will be blue. If the same collision occurs above 96 kilometres, however, the light will be purple. Or, if the solar wind particles collide with oxygen, the colours produced will be either red or green. However, merely understanding how the aurora works does not do this phenomena justice. To truly appreciate the full splendor of the aurora, you will have to see this Natural Wonder of the World in person.
1. Which of the following statements about the Aurora Borealis is true?

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 is a characteristic of human nature that people like to get together and have fun, and people live during America's frontier days were no exception. However, because life was hard and the necessities of day-to-day living took up their time, it was common for recreation to be combined with activities necessary for survival. One example of such a form of recreation was logrolling. Many frontier areas were heavily wooded, and in order to settle an area it was necessary to move the trees. A settler could cut down the trees alone, but help was needed to move the cut trees. After a settler had cut a bunch of trees, he would then invite is neighbours over for a logrolling. A
logrolling is a community event where families got together for a combination of work and fun. The women would bring food and have a much needed and infrequent opportunity to relax and chat with friends, the children would play together exuberantly, and the men would hold lively competitions that involved rolling logs from place to place as quickly as possible. This was a day of fun for everyone involved, but as its foundation was the need to clear the land.

According to the passage, what did people have to do first to settle an area?

Fill in each numbered blank with one suitable word or phrase

There are many reasons (1) _____ taking regular time with our family is important:

It (2) _____ a place to listen, teach, learn, and (3) _____ ourselves freely and safely. It provides (4) _____ to discuss family joys, issues, and problems. Family members can practice skills in a non-threatening (5) _____. Families are a (6) _____ part of our society and the fabric of our communities - we spend (7) _____ time together to get our feelings (8) _____ belonging, our values, support and understanding. It helps (9) _____ family members together and feel safe in today's world where (10) _____ can lead to family disintegration.

(1) ________

Choose the best answer:
“Why did you buy these oranges? ” “They were ……….….. I could find. ”

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.
In the past, people bought goods using (1).................. They rarely borrowed money from financial institutions and only when they had saved the money did they buy what they wanted.
Recently, however, there have been great changes in the way people purchase goods. To begin with, some people pay for things by  cheque, (2)................ others prefer monthly installments rather than paying the whole amount at once. Most consumers, though, prefer to buy things using their credit cards. (3)..............., it is thought that there are benefits to having a credit card. Apart from the fact that credit cards are handy, some stores offer bonus points to people making purchases, while others give discounts on certain products.
On the other hand, credit cards must be used wisely because they can prove disastrous. In the long run, consumers find that they can’t (4)............. without their credit cards and constantly rely on them, as they are “easy money”. As a result, some people lose control of their finances spending more than they should end up not being able to (5).................. So they end up in debt and have difficulty in paying it back.

(1)............................................

The concept of urban agriculture may conjure up images of rooftop, backyard or community gardens scattered among downtown city streets and surrounding neighborhoods. But in the Seattle area, and within and beyond the Puget Sound region, it means a great deal more. "Urban agriculture doesn't necessarily equate to production that occurs only in a metropolitan urban area, "says Jason Niebler, who directs the Sustainable Agriculture Education (SAgE) initiative at Seattle Central Community College. "It means we are providing for growing population food needs from surrounding rural landscapes, as well as from the core urban landscape."

Picture a series of concentric circles, with an urban core that produces some food at varying capacities, surrounded by a series of outlying rings of small farms that become increasingly more rural with distance. The hope is that such land use planning, from the inner core to the outer rings, will encourage local ecologically sound sustainable food production. This, in turn, will create local jobs and decrease reliance on distant food products that originate from petroleum-intensive large scale farms.

That's the idea behind SAgE, believed to be the nation's first metropolitan-based community college sustainable agriculture program that emphasizes farming practices across diverse landscape types from urban centers to surrounding rural environs. "It's small scale agriculture with an urban focus" Niebler says. "Any urban population, large or small, can practice sustainable agriculture, improve food security and protect the environment, which ultimately results in resilient food systems and communities."

SAgE is a part of National Science Foundation's Advanced Technological Education (ATE) Program, which is providing the project with $157,375 over two years. ATE's goal is to support projects that strengthen the skills of technicians who work in industries regarded as vital to the national's prosperity and security. The support largely goes to community colleges that work in partnership with universities, secondary schools, businesses and industries, as well as government agencies, which design and implement model workforce initiatives.

The SAgE project focuses on the environmental, socioeconomic, political and cultural issues related to sustainable food systems, within Puget Sound watersheds through student and community education and research, and technological innovation. The curriculum offers courses that cover such issues as agricultural ecology, urban food systems, food politics and ethics, soil science, sustainable food production and technology, the integration of food and forests, and career opportunities.

"We've created a curriculum that is fundamental in nature, addressing the principles of sustainable agriculture and what a food system is - how it functions both locally and globally," Niebler says. "These courses are challenging, robust and inspirational. One of the really wonderful things about them is that we offer service learning opportunities, where students volunteer a portion of their time to working with local partner organizations. They can do a research project, or a service learning option. The ideal would be to prompt students into careers that involve sustainable practices in an urban agriculture setting."

Adapted from "Promoting Sustainable Agriculture" by Mariene Cimons

The word "concentric" in paragraph 2 is closet in meaning to________.

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 1 to 5.
Drone racing is an exciting new sport, that has become popular faster than (1).......... other sport before it. Pilots steer small and lightweight, but high-powered drones along courses with obstacles. They fly through gates and around flags at speeds of over a hundred miles an hour.
 They control the drones using VR-like headgear. Every drone has a camera (2)...........to it so that spectators can also view flights either on a big screen or with special headgear.
The races take place either outdoors - in big stadiums, or indoors in old warehouses and sports arenas. (3)................ are short because the battery time of drones is limited.
(4)..............drone racing started only a few years ago there are already international competitions that take place all over the world. In professional leagues, drone pilots compete for thousands of dollars. In March, the World Drone Prix was staged in Dubai. A 16-year old British teenager not only one the race but also received a prize money of 250 000 dollars.
Television and other media have become aware of drone racing. ESPN, an Amercian sports channel, will be broadcasting international drone races starting this August. Races are also recorded and uploaded to YouTube and other video platforms (5)............. they can be viewed over and over again.

(5)..................

Choose the best answer:
I started studying English 3 years ago. → I have

Mark the letter A, B, C, or D to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.
James holds ambivalent views on whether or not computer is a lucrative invention

Choose the underlined words or phrases that are not correct in standard written English.
When I was on holiday last summer, I was going to the beach everyday.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Carefully conducted studies that have followed the children of working mothers have not been able to show any long-­‐term problems, compared (1)_____children whose mothers stay at home. My personal (2) _____is that mothers should be allowed to work if they wish. Whether we like it or not, there are a number of mothers who just have to work. There are many who must work out of pure economic (3) _____. Many mothers are not born to be full-time parents. After a few months at home with a much loved infant, the feel trapped and isolated. There are a number of options when it refers to choosing childcare. These range from child minders and nannies through to Granny or the kind of lady across the street. In reality, (4) _____ many parents do no have any choice; they have to accept anything they can get. Be prepared! No (5)_____ how good the children may be, some children are going to protect wildly if they are left. This is a (6) _____ normal stage of child development. Babies separate well in the first six months, but soon after that they start to get a crush on Mum and close family (7)_____. Make sure that in the first week, you allow plenty of time to help your child (8)_____. All children are different. Some are independent,(9) _____ others are more attached to their mothers. Remember that if you want to do the best for your children, it’s not the quantity of time you spend with them, it’s the (10)_____ that matters

Read the passage below carefully, and then choose the best answer:
Hooray for Hip Hop
It is amazing how far hip hop music has come in its relatively short history. You can trace the roots of this urban art form to New York City in the 1970s. Hip hop began as a spontaneous way of entertaining crowds. DJs discovered that people loved dancing to the drum breaks in popular funk and soul records. These breaks were typically brief, so DJs would move or “scratch” records back to extend them. In addition, a master of ceremonies (MC) would sometimes grab the microphone and say a few words to get the crowd more excited. At first, the words of MCs were simple chants but they later became a more complex form of poetry. Still, for several years rap remained an underground art. Then, in the early 1980s, artists like LL Cool J, KRS-One, and Run DMC helped it reach a wider audience. Nevertheless, hip hop didn’t have an easy road to mainstream success. Many people dismissed rap music because no “real musicians” were involved in creating it. Critics blamed the beats were repetitive and stolen from other artists. Others claimed the lyrics were too negative and violent. Yet they were overlooking several things. The lyrics were often from the perspective of underprivileged youths growing up in the big city. Although these words were often dark, they painted a clear picture that allowed outsiders to understand their joys and pain. Not all hip hop songs had a heavy message, though. Others were quite humorous and showed a lighter side of street life. The influence of hip hop would spread far beyond music itself. In fact, a collection of other art forms, would develop out of it. Since hip hop music had a beat like no other music before it, new dance styles had to emerge. B-boying, more commonly called break dancing, was one of these styles. Break dancers featured lots of spinning and fancy moves that took speed, agility, and lots practice to perfect. Hip hop also helped to inspire waves of modern street graffiti. Urban artists would spray-paint their names on walls and subway cars a rebellious way of expressing themselves. After nearly three decades of popularity, hip hop has spread from New York to every continent on the earth and it is still going strong as it continues to evolve.
1. What best describes the early lyrics of hip hop?