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:
People commonly complain that they never have enough time to accomplish tasks. The hours and minutes seem to slip away before many planned chores get done. According to time management experts, the main reason for this is that most people fail to set priorities about what to do first. They get tied down by trivial, time consuming matters and never complete the important ones.
One simple solution often used by those at the top is to keep lists of tasks to be accomplished daily. These lists order jobs from most essential to least essential and are checked regularly through the day to assess progress. Not only is this an effective way to manage time, but also it serves to give individuals a much deserved sense of satisfaction over their achievements. People who do not keep lists often face the end of the word day with uncertainly over the significance of their accomplishments, which over time can contribute to serious problem in mental and physical health.

According to the passage, what does “slip away” mean?

Choose the best answer:
If you‘ve been told by your boss to improve your knowledge of a foreign language you‘ll know that success doesn‘t come quickly. It generally takes years to learn another language well and constant (33) _____ to maintain the high standards required for frequent business use. Whether you study in a class, with audio cassettes, computers or on your (34) _____ sooner or (35) _____ every language course finishes and you must decide what to do next if you need a foreign language for your career. Business Audio Magazine is a new product designed to help you continue language study in a way that fits easily into your busy schedule. Each audio cassette (36) _____ of an hour-long program packed with business news, features and interviews in the language of your choice. These cassettes won‘t teach you how to order meals or ask for directions. It‘s (37) _____ that you can do that already. Instead, by giving you an opportunity to hear the language as it‘s really spoken, they help you to (38) _____ your vocabulary and improve your ability to use real language relating to, for example, that all-important marketing trip. The great advantage of using audio magazines is that they (39) _____ you to perfect your language skills in ways that suit your lifestyle. For example, you can select a topic and listen in your car or hotel when away on business. No other business course is as (40) _____ and the unique radio magazine format is as instructive as it‘s entertaining. In addition to the audio cassette, this package includes a transcript with a business glossary and a study (41) _____. The components are structured so that intermediate and advanced students may use separately or together, (42) _____ on their ability.

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:
Animation traditionally is done by hand-drawing or painting successive frames of an object, each slightly different than the preceding frame. In computer animation, although the computer may be the one to draw the different frames, in most cases the artist will draw the beginning and ending frames and the computer will produce the drawings between the first and the last drawing. This is generally referred to as computer-assisted animation, because the computer is more of a helper than an originator.
In full computer animation, complex mathematical formulas are used to produce the final sequence of pictures. These formulas operate on extensive databases of numbers that define the objects in the pictures as they exist in mathematical space. The database consists of endpoints, and color and intensity information. Highly trained professionals are needed to produce such effects because animation that obtains high degrees of realism involves computer techniques for three-dimensional transformation, shading, and curvatures.
High-tech computer animation for film involves very expensive computer systems along with special color terminals or frame buffers. The frame buffer is nothing more than a giant image memory for viewing a single frame. It temporarily holds the image for display on the screen.
A camera can be used to film directly from the computer's display screen, but for the highest quality images possible, expensive film recorders are used. The computer computes the positions and colors for the figures in the picture, and sends this information to the recorder, which captures it on film. Sometimes, however, the images are stored on a large magnetic disk before being sent to the recorder. Once this process is completed, it is repeated for the next frame. When the entire sequence has been recorded on the film, the film must be developed before the animation can be viewed. If the entire sequence does not seem right, the motions must be corrected, recomputed, redisplayed, and rerecorded. This approach can be very expensive and time consuming. Often, computer-animation companies first do motion tests with simple computer-generated line drawings before selling their computers to the task of calculating the high-resolution, realistic-looking images.

The word "they" in the second paragraph refers to      

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The first traffic signal was invented by a railway signaling engineer. It was installed (33) ___ the Houses of Parliament in 1868. It (34)_____ like any railway signal of the time, and was operated by gas. (35) ____, it exploded and killed a policeman, and the accident discouraged further development until cars became common. (36) ____ traffic lights are an American invention. Red – green systems were installed in Cleveland in 1914. Three - color signals, operated (37) _____ hanz d from a tower in the (38) _____ of the street, were installed in New York in 1918. The first lights of this type to (39) ____ in Britain were in London, on the junction between St. James‘s Street and Piccadilly, in 1925. Automatic signals were installed (40) ____ year later. In the past, traffic lights were special. In New York, some lights had a statue on top. In Los Angeles the lights did not just change silently, but would ring bells to (41) _____ the sleeping motorists of the 1930s. These are gone and have been (42) ____ by standard models which are universally adopted

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.
                       NOISE POLLUTION
Noise is more than a mere nuisance. At certain levels and durations of exposure, it can cause physical damage to the eardrum, and (1)..... in temporary or permanent hearing loss. In addition to causing hearing loss, (2)....... noise exposure can also (3)....... blood pressure and pulse rate, cause irritability, anxiety, and mental fatigue, and interfere with sleep, recreation, and personal communication. Noise pollution control is, (4)....... , of importance in the workplace and in the community.
Noise effects can be (5)..... by a number of techniques, for example, increasing the distance or blocking the path between the noise source and the recipient, reducing noise level at the source, and protecting recipients with earplugs or earmuffs.

(2)..................................

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:
It takes a long time to raise a family of owlets, so the great horned owl begins early in the year. In January and February, or as late as March in the North, the male calls to the female with a resonant hoot. The female is larger than the male. She sometimes reaches a body length of twenty-two to twenty-four inches, with a wingspread up to fifty inches. To impress her, the male does a strange courtship dance. He bobs. He bows. He ruffles his feathers and hops around with an important air. He flutters from limb to limb and makes flying sorties into the air. Sometimes he returns with an offering of food. They share the repast, after which she joins the dance, hopping and bobbing about as though keeping time to the beat of an inner drum. Owls are poor home builders. They prefer to nest in a large hollow in a tree or even to occupy the deserted nest of a hawk or crow. These structures are large and rough, built of sticks and bark and lined with leaves and feathers. Sometimes owls nest on a rocky ledge, or even on the bare ground. even to occupy the deserted nest of a hawk or crow. These structures are large and rough, built of sticks and bark and lined with leaves and feathers. Sometimes owls nest on a rocky ledge, or even on the bare ground. The mother lays two or three round, dull white eggs. Then she stoically settles herself on the nest and spreads her feather skirts about her to protect her precious charges from snow and cold. It is five weeks before the first downy white owlet pecks its way out of the shell. As the young birds feather out, they look like wise old men with their wide eyes and quizzical expressions. They clamor for food and keep the parents busy supplying mice, squirrels, rabbits, crayfish, and beetles. Later in the season baby crows are taken. Migrating songsters, waterfowl, and game birds all fall prey to the hungry family. It is nearly ten weeks before fledglings leave the nest to search for their own food. The parent birds weary of family life by November and drive the young owls away to establish hunting ranges of their own.

According to the passage, young owlets eat everything EXCEPT

Choose the best answer:
Interpreting the feelings of other people is not always easy, as we all know, and we (1) __ _ as much on what they seem to be telling us, as on the actual words they say. Facial (2) _ _ and tone of voice are obvious ways of showing our (3) _ _ to something, and it may well be that we unconsciously express views that we are trying to hide. The art of being (4) __ _ lies in picking up these signals, realizing what the other person is trying to say, and acting so that they are not embarrassed in any way. For example, we may understand that they are in fact (5) __ __ to answer our question, and so we stop pressing them. Body movements in general may also indicate feelings, and interviewers often pay particular attention to the way a candidate for a job walks into the room and sits down. However it is not difficult to present the right kind of appearance while what many employers want to know relates to the candidate‘s character traits, and (6) __ __ stability. This raises the awkward question of whether job candidates should be asked to complete psychological tests, and the further problem of whether such tests actually produce (7) __ __ results. For many people, being asked to take part in such a test would be an objectionable (8) __ _ into their private lives. After all, a prospective employer would hardly ask a candidate to run a hundred meters, or expect his or her family doctor to provide (9) _ _ medical information. Quite apart from this problem, can such tests predict whether a person is likely to be a (10) __ __ employee or a valued colleague?

Choose the best answer:
The role of translation enabling literature to pass beyond its natural frontiers is receiving growing recognition. In view of the general increase in this (30)_____, it is not surprising that many people with literary interests and a knowledge of languages should think of adopting translating as a full-or part-time (31)_____. Some advice may usefully be given to such would-be translators. The first difficulty the beginner will (32)_____is the unwillingness of publishers to entrust a translator to anyone who has not already (33)____a reputation for sound work. The least publishers will (34)____ before commissioning a translator is a fairly lengthy specimen of the applicant‘s work, even if unpublished. Perhaps the best way the wouldbe translator can begin is to select some books of the type (35)_____ he or she feels competent and eager to translate, translate a (36)_____section of the book and then submit the book and the translation to a suitable publisher. If he or she is extremely lucky, this may result in a commission to translate the book. More probably, however, publishers will(37) the book as such but if they are favorably (38) by the translation, they may very possibly commission some other books of a (39) nature which they already have in mind

Choose the best answer:
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

Choose the best answer:
At 19, Ben Way was already a millionaire, and one of a number of teenagers who_____(1) their fortune through the Internet._____(2) makes Ben‘s story all the more remarkable is that he is dyslexic, and was_____ (3)by teachers at his junior school that he would never be able to read or write properly.‖ I wanted to prove them_____ (4)―, says Ben, creator and director of Waysearch engine which can be used to find goods in online shopping malls. When he was eight, his local authorities_____(5) him with a PC to help with school work. Althrough he was_____ (6)to read the manuals, he had a natural ability with the computer, and encouraged by his father, he soon began_____(7) people $ 10 an hour for his knowledge and skills. At the age of 15 he _____(8) up his own computer consultancy, Quad Computer, which he ran from his bedroom, and two years later he left school to_____(9) all his time to business. ―By this time the company had grown and needed to take_____(10) a couple of employees to help me‖, says Ben.That enabled me to start doing business with bigger companies.It was his ability to consistently overcome difficult challenges that led him to win the ―Young Entrepreneur of the year‖ award in the same year that he formed Waysearch

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People in the United States often shop from catalogs. There are special catalogs for (1)____ every need, including clothing, furniture, health, (2)____ products and things for the kitchen. People also order (3)_____ 40% of their music from music club catalogs. Customers say that music stores are too noisy. Television shopping began in 1986. About 5% to 8% of the American public now shops by television. Some (4)_____shopping channels are the Home Shopping Network and QVC. Customers say that television shopping is (5)____.than shopping in a store. How do they buy things? They (6)______a phone call and charge the item to their credit card. And TV shopping channels are on late at night (7)______people can go shopping anytime. Is computer shopping the way of the future? About 37% of American (8)____now have personal computers. And shopping by computer (or shopping on-line) is (9)______to more people every day. Already, shoppers can use their computers to order many different products, such as computer products, flowers, foods, T-shirts, and posters. And new on- line shopping services (10)________every day. Soon people may be able to shop for anything, anytime, anywhere in the world

Choose the best answer:
One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is a basic human right. But acid rain, (1) ________ pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools (2) ________ poison. Lake Baikal in Russia is one of the largest lakes in the world. It (3) ________ a rich variety of animals and plants, including 1,300 rare species that do not exist (4) ________ else in the world. But they are being destroyed by the massive volumes of toxic effluent which (5) _______ into the lake every day. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea (6) ________ 1% of the world's water surface. But it is the dumping (7) ________ for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles (8) ________ shore. Water is free to everyone. A few years ago, people thought that the supply of clean water in the world was limitless. Today, many water supplies have been (9) ________ by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious (10) ________. We should do something now

Choose the best answer:
Ostriches are the largest and heaviest birds on earth. They can grow to be as tall as 9 feet and can weigh as much as 250 pounds. Even though they have wings, they cannot fly. Instead, ostriches have long, powerful legs that help them to run very fast when they feel threatened. Ostriches use their wings to move themselves forward and to help them change direction. Ostriches are native to Africa, where they still live in desert areas and dry, open grasslands called savannah. Ostriches can also be found in zoos all over the world. Humans have domesticated ostriches, so now ostriches live on farms in over a dozen countries, including the United States, China, India, Japan, Brazil and Costa Rica. They are raised for their meat, skin, and feathers. Ostriches like to live in small groups called herds. The male ostrich is called a rooster; the female, a hen. Baby ostriches are called chicks. The female ostrich lays the eggs, but both the male and the female take turns sitting on the eggs to keep them warm.
2. The word threatened in paragraph 1 is CLOSEST in meaning to ______ 

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:
A lot of advice is available for college leavers heading for their first job. In this article we consider the move to a second job. We are not concerned with those looking for a second temporary position while hunting for a permanent job. Nor are we concerned with those leaving an unsatisfactory job within the first few weeks. Instead, we will be dealing with those of you taking a real step on the career ladder, choosing a job to fit in with your ambitions now that you have learnt your way around, acquired some skills and have some idea of where you want to go.
What sort of job should you look for? Much depends on your long-term aim. You need to ask yourself whether you want to specialize in a particular field, work your way up to higher levels of responsibility or out of your current employment into a broader field.
Whatever you decide, you should choose your second job very carefully. You should be aiming to stay in it for two or three years. This job will be studied very carefully when you send your letter of application for your next job. It should show evidence of serious career planning. Most important, it should extend you, develop you and give you increasing responsibility. Incidentally, if you are interested in traveling, now is the time to pack up and go. You can do temporary work for a while when you return, pick up where you left off and get the second job then. Future potential employers will be relieved to see that you have got it out of your system, and are not likely to go off again.
Juliette Davidson spend her first year after leaving St. Aldate’s College working for three lawyers. It was the perfect first job in that “ OK ... they were very supportive people. I was gently introduced to the work, learnt my way around an office and improve my word processing skills. However, there was no scope for advancement. One day, I gave my notice, bought an air ticket and traveled for a year.”
Juliette now works as a Personal Assistant to Brenda Cleverdon, the Chief Executive of business in the Community. “In two and a half years I have become more able and my job has really grown”, she says. “ Right from the beginning my boss was very keen to develop me. My job title is the same as it was when I started but the duties have changed. From mainly typing and telephone work, I have progressed to doing most of the correspondence and budgets. I also have to deal with a variety of queries, coming from chairmen of large companies to people wanting to know how to start their own business. Brenda involves me in all her work but also gives me specific projects to do and events to organize.

Who is intended to benefit from the advice given in the article?

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

"“Customs, then, is the great guide of human life,” wrote Scottish (1)…..  David Hume. Knowing the customs of a place is a guide to understanding the soul of that place and its (2)….. . The customs of a nation: how people marry, how families celebrate holidays and other (3)…… , what people eat, how they socialize and have fun (4) ….. many things about their country and their inner thoughts and feelings.
 In Wales, a (5)…… handshake is usual when first being introduced, but is often dispensed with thereafter. When meeting for the first time, a common (6)….. is “How do you do?” or “Pleased to meet you.” On other occasions, “How are you?” may be used. Good friends, (7) ……  young people, use “Hello” and “Hi” to greet each other. Women who are close friends may kiss each(8) ….. once slightly on the cheek; sometimes men also kiss women this way.
 Many women remain seated when being introduced and shaking hands. First (9) …… are widely used. The Welsh enjoy visiting friends and neighbors, and often call without an invitation. If invited for a meal, however, it is (10) ……. impolite to arrive late."

8. Women who are close friends may kiss each(8) ….. once slightly on the cheek;

Choose the best answer:
Feminism, collective term for systems of belief and theories that pay special (24) to women‘s rights and women‘s position in culture and society. The term tends to be used for the women‘s rights movement, which began in the late 18th century and continues to campaign for complete political, social, and economic equality between women and men. This article (25) specifically with the development of the ideas behind that movement and their (26) and impact. Feminists are united by the idea that women‘s position in society is unequal to (27) of men, and that society is structured in such a way as to benefit men to the political, social, economic (28) of women. However, feminists have used different theories to explain these (29) and have advocated different ways of redressing inequalities, and there are marked geographic and historical variations in the nature of feminism. Historically, feminist thought and activity can be divided into two waves. The first wave, which began in about 1800 and (30) until the 1930s, was largely concerned with gaining equal rights between women and men. The second wave, which began in the late 1960s, has continued to fight for (31) but has also developed a (32) _ of theories and approaches that stress the difference between women and men and that draw attention to the (33) needs of women

A recent survey of crime statistics shows that we are all more likely to be burgled now than 20 years ago and the police advise everyone to take a few simple precautions to protect their homes.

The first fact is that burglars and other intruders prefer easy opportunities, like a house which is very obviously empty. This is much less of a challenge than an occupied house, and one which is well-protected. A burglar will wonder if it is worth the bother.

There are some generalt ips on how to avoid your home becoming another crime statistic. Avoid leaving signs that your house is empty. When you have to go out, leave at least one light on as well as a radio or television, and do not leave any curtains wide open. The sight of your latest music centre or computer is enough to tempt any burglar.

Never leave a spare key in convenient hiding place. The first place a burglar will look is under the doormat or in a flower pot and even somewhere more ‘imaginative’ could soon be uncovered by the intruder. It is much safer to leave a key with a neighbour you can trust. But if your house is in a quiet, desolate area be aware that this will be a burglar’s dream, so deter any potential criminal from approaching your house by fitting security lights to the outside of your house.

But what could happen if, in spite of the aforementioned precautions, a burglar or intruder has decided to target your home. Windows are usually the first point of entry for many intruders. Downstairs windows provide easy access while upstairs windows can be reached with a ladder or by climbing up the drainpipe. Before going to bed you should double-check that all windows and shutters are locked. No matter how small your windows may be, it is surprising what a narrow gap a determined burglar can manage to get through. For extra security, fit window locks to the inside of the window.

What about entry via doors? Your back door and patio doors, which are easily forced open, should have top quality security locks fitted. Even though this is expensive it will be money well spent. Install a burglar alarm if you can afford it as another line of defence against intruders.

A sobering fact is that not all intruders have to break and enter into a property. Why go to the trouble of breaking in if you can just knock and be invited in? Beware of bogus officials or workmen and, particularly if you are elderly, fit a chain and an eye hole so that you scrutinise callers at your leisure. When you do have callers never let anybody into your home unless you are absolutely sure they are genuine. Ask to see an identity card, for example.

If you are in the frightening position of waking in the middle of the night and think you can hear an intruder, then on no account should you approach the intruder. It is far better to telephone the police and wait for help.

A well-protected house ________ .

Choose the best answer:
Bodies are made to move! They are not (19) _________for sitting around in front of the television or reading magazines. Keeping fit doesn‘t (20) _________you have to be a super-athlete, and even (21) ______exercise can give you a lot of fun. When you are fit and healthy, you will find you look better and feel better. You will develop more energy and self-confidence. Every time you move, you are exercising. The human body is designed to bend, stretch, run, jump and climb. (22) _________ it does, the stronger and fitter it will become. Best of all, exercise is fun. It‘s what your body likes doing most-keeping on the (23) _________. Physical exercise is not only good for your body. People who take regular exercise are usually happier, more relaxed and more alert (24) _________ people who sit around all day. Try an experiment-next time you are (25) _________a bad mood, go for a walk or play a ball game in the park. See how much better you feel after an hour. A good (26) _________of achievement is yet another benefit of exercise. People feel good about themselves when they know they have (27) _________their fitness. People who exercise regularly will tell you that they find they have more energy to enjoy life. So have (28) _________-you‘ll soon see and feel the benefits

Choose the best answer:
The UK Government ensures that all schools in the UK(55)_______ certain standards, and this includes independent schools as well as those that are (56)_______ by the Government. All qualifications are awarded by national agencies accredited by the Qualification and Curriculum Authority (QCA), (57)_______ the quality of the qualifications you will gain is guaranteed. At many independent schools inEngland, you will be encouraged to take part (58)_______ extracurricular activities to develop your hobbies and learn new skills, and you may be encouraged to take graded music exams (59)_______ by the Associated Board of the Royal Schools of Music. The exam grades gained from these are widely accepted toward university entry (60)_______ . Independent schools do not usually offer vocationally focused qualifications but if you are (61)_______ in these qualifications, you can find out more in the 'career-based and pre-university qualifications' section. The (62)_______ you pay to attend independent school, include your course fees, accommodation and may include some or all extracurricular activities. Fees (63)_______ from school to school and are at the discretion of the institution; there are no national standards. You should expect to pay a minimum of £8,000 per year and fees can be (64)_______ high as £25,000

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:
Not very long ago, when people needed to find a job, there were several possible steps. They might begin with a look through the classified ads in the newspaper. They could go to the personnel office at various companies and fill out an application, or they could go to an employment agency. They could even find out about a job opening through word-of-mouth - from another person who had heard about it.
These days, job hunting is more complicated. The first step is to determine what kind of job you want (which sounds easier than it is) and make sure that you have the right education for it. Rapid changes in technology and science are creating many professions that never existed until recently. It is important to learn about them because one might be the perfect profession for you. The fastest- growing areas for new jobs are in computer technology and health services. Jobs in these fields usually require specific skills, but you need to find out exactly which degrees are necessary. For example, it may be surprising to learn that in the sciences, an M.S. is more marketable than a Ph.D! In other words, there are more jobs available for people with a Master of Science degree than for people with a doctorate (however, people who want to do research still need a Ph.D.) How do people learn about "hot" new professions? How do they discover their "dream job"? Many people these days go to a career counselor. In some countries, job hopping has become so common that career counseling is now "big business". People sometimes spend large amounts of money for this advice. In Canada and the United States, high school and college students often have access to free vocational counseling services on campus. There is even a career organization, the Five O'Clock Club, which helps members to set goals. Members focus on this question: what sort of person do you want to be years from now? The members then plan their career around that goal. All career counselors - private or public - agree on one basic point: it is important for people to find a career that they love. Everyone should be able to think, "I'm having such a good time. I can't believe they're paying me to do this.

The word “them” in the second paragraph refers to     .

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:
In the history of technology, computers and calculators were innovative developments. They are essentially different from all other machines because they have a memory. This memory stores instructions and information. In a calculator, the instructions are the various functions of arithmetic, which are permanently remembered by the machine and cannot be altered or added to. The information consists of the numbers keyed in.
An electronic pocket calculator can perform almost instant arithmetic. A calculator requires an input unit to feed in numbers, a processing unit to make the calculation, a memory unit, and an output unit to display the result. The calculator is powered by a small battery or by a panel of solar cells. Inside is a microchip that contains the memory and processing units and also controls the input unit, which is the keyboard, and the output unit, which is the display.
The input unit has keys for numbers and operations. Beneath the key is a printed circuit board containing a set of contacts for each key. Pressing a key closes the contacts and sends a signal along a pair of lines in the circuit board to the processing unit, in which the binary code for that key is stored in the memory. The processing unit also sends the code to the display. Each key is connected by a different pair of lines to the processing unit, which repeatedly checks the lines to find out when a pair is linked by a key.
The memory unit stores the arithmetic instructions for the processing unit and holds the temporary results that occur during calculation. Storage cells in the memory unit hold the binary codes for the keys that have been pressed. The number codes, together with the operation code for the plus key,   are    held    in    temporary    cells    until    the    processing    unit    requires    them. When the equals key is pressed, it sends a signal to the processing unit. This takes the operation code-for example, addition-and the two numbers being held in the memory unit and performs the operation on the two numbers. A full adder does the addition, and the result goes to the decoder in the calculator's microchip. This code is then sent to the liquid crystal display unit, which shows the result, or output, of the calculation.

The word "innovative" in line 1 could best be replaced by _     .