Just as optical fibers have transformed communication, they are also revolutionizing medicine. These ultrathin, flexible fibers have opened a window into the living tissues of the body. By inserting optical fibers through natural openings or small incisions and threading  them along the body's established pathways, physicians can look into the lungs, intestines,  heart and other areas that were formerly inaccessible to   them.
The basic fiber-optics system is called fiberscope, which consists of  two  bundles  of fibers. One, the illuminating bundle, carries light to the tissues. Is is coupled to  a  high- intensity light source. Light enters the cores of the high-purity silicon glass and travels along the fibers. A lens at the end of the bundle collects the light and  focuses  it into the other  bundle, the imaging bundle. Each fiber in the bundle transmits only a tiny fraction of the total image. The reconstructed image can be viewed through an eyepiece or displayed on a television screen.
During the last five years, improved methods of fabricating optical fibers have led to a reduction in fiberscope diameter and an increase in the number of fibers, which in turn has increased resolution. Optical fibers can also be used to deliver laser light. By use of laser beams, physicians can perform surgery inside the body, sometimes eliminating the need for invasive procedures in which healthy tissue must be cut through to reach the site of disease. Many of these procedures do not require anesthesia and can be performed in a physician's office. These techniques have reduced the risk and the cost of medical care.

The word resolution is closest in meaning to which of the following?

Read the following passage and choose the letter A, B, C or D to indicate the best answer to each of the following question.

Music can move the soul. It can be a very strong influence. Some music can calm us down but other music can make us wild! How does music affect us? Music is used in a variety of ways. It is used in the medical field as a source of research and as a sort of treatments as well. Music has been used as treatment to lower blood pressure, help ill children recover quickly, treat mental illness, treat depression, aid in healing, and reduce stress and insomnia and premature infants. Julius Portnoy, a musicolo­gist, found that it can change heart rates, increase or decrease blood pressure, effect energy levels, and digestion, positively or negatively, depending on the type of music. Calming music, such as classical musk, was found to have a very calming effect on the body, and cause the increase of endorphins, thirty minutes of such music was equal to the effect of a dose of valium. Both hemispheres of the brain are involved in processing music. The music in these studies is not the lyrics, but the music itself, the melody, the tones, the tunes, the rhythm, and the chords. Conversely music has also been documented to cause sickness. The right, or wrong music, can be like a poison to the body. Studies had been done on plants and the results were that loud hard rock music killed plants and soft classical music made the plants grow faster. Music is very pow­erful, like a drug and can even be an addiction. According to Patty Hearst, a researcher on music, it was documented that music was used in the aid of brainwashing some people. In the book, "Elevator Music" by Joseph Lanza, it is stated that certain types of strong music over prolonged periods in certain conditions were shown to cause seizures.

The talked about the effect of music on __________.

Why is it that flying to New York from London will leave you feeling less tired than flying to London from New York? The answer may be a clear case of biology not being able to keep up with technology.
Deep inside the brain there is a "clock" that governs every aspect of the body's functioning: sleep and wake cycles, levels of alertness, performance, mood, hormone levels, digestion, body temperature and so on. It regulates all of these functions on a 24-hour basis and is called the circadian clock (from the Latin, circa "about" + dies "day"). This body clock programmes us to be sleepy twice a day, between 3-5 a.m and again between 3-5 p.m.
Afternoon tea and siesta times are all cultural responses to our natural biological sleepiness in the afternoon.
One of the major causes of the travelers' malady known as jet lag is the non-alignment of a person's internal body clock with clocks in the external world. Crossing different time zones confuses the circadian clock, which then has to adjust to the new time and patterns of light and activity. To make matters more complex, not all internal body functions adjust at the same rate. So your sleep/wake may adjust to a new time zone at one rate, while your temperature adjusts at a different pace. Your digestion may be on a different schedule altogether.
Though we live in a 24-hour day, the natural tendency of the body clock is to extend our day beyond 24 hours. It is contrary to our biological programming to shrink our day. That is why traveling in a westward direction is more body-clock friendly than flying east. NASA studies of long haul pilots showed that westward travel was associated with significantly better sleep quantity and quality than eastward flights.
When flying west, you are "extending" your day, thus traveling in the natural direction of your internal clock. Flying eastward will involve "shrinking" or reducing your day and is in direct opposition to your internal clock's natural tendency. One of the more common complaints of travelers is that their sleep becomes disrupted. There are many reasons for this: Changing time zones and schedules, changing light and activity levels, trying to sleep when your body clock is programmed to be awake, disruption of the internal circadian clock and working longer hours.
Sleep loss, jet lag and fatigue can seriously affect our ability to function well. Judgment and decision-making can be reduced by 50%, attention by 75 percent, memory by 20 percent and communication by 30 percent.
It is often suggested that you adjust your watch as soon as you board a plane, supposedly to try to help you adjust to your destination's schedule as soon as you arrive. But it can take the body clock several days to several weeks to fully adjust to a new time zone.

Jet lag.........................

Read the passage carefully and choose the correct answer.

Today more and more women are actively participating in social activities both in urban and rural areas. Specifically, they have shined brightly  in  even  many  fields  commonly  regarded  as  the  man's  areas  such as  business,  scientific  research  and  social  management.  In  some areas,  women  even  show  more  overwhelming  power  than  men.  The  image  of  contemporary  Vietnamese  women  with  creativeness, dynamism, success has become popular in Vietnam's society. The fact reveals that the gender gap has been remarkably narrowed and women enjoy  many  more  opportunities  to  pursue  their  social  careers  and  obtain  success,  contributing  to  national  socio-economic  development.

According  to  Ms Le  Thi  Quy,  Director  of  the  Gender/and  Development  Research  Centre  under  the  University  of  Social  Sciences  and Humanities,  Hanoi National  University,  gender  equity  in  Vietnam  has  reached  a  high  level  over  the  past  decade.  The  rate  of  Vietnamese women  becoming  National  Assembly  members from the  9th  term  to  the  11th  term  increased  8.7%,  bringing  the  proportion  of  Vietnamese women in authority to 27.3%, the highest rate in Southeast Asia. There is no big gap in the level of literacy and schooling between men and women.  Women account for about  37%  of  university  and  college  graduates,  19.9%  of  doctoral  degree  holders  and 6.7%  of  professors  and associate professors.

The legitimate rights  of  women  and  children  are  ensured  more  than  ever  before  with more  complete  legal  documents  including laws, conventions and national action plans, among which the laws on "gender equity" mark a turning-point in the empowerment of women. Mass media also highlights the continued success of women in every field and honors their great importance in modern society, helping to do away  with outdated perceptions about traditional women's duties. Many projects on reproductive health care, children protection, and family  income  improvement  jointly  conducted  by  various  mass  organizations,  state  agencies  and  non-governmental  organizations  have created favorable conditions for women to become involved.

According to the data in the text, _______.

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

"Women’s Rights, rights that establish the same social, economic, and political (1)…. for women as for men. Women’s rights guarantee that women will not face (2)… on the basis of their sex. Until the second half of the 20th century, women in most societies were denied some of the legal and political rights accorded (3)… men. Although women in much of the world have gained significant legal rights, many people believe that women still do not have (4)….. political, economic, and social equality with men.
 Throughout much of the history of Western civilization, (5) ….. cultural beliefs allowed women only limited roles in society. Many people believed that women’s natural roles were as mothers and wives. These people (6)….. women to be better suited (7)……  childbearing and homemaking rather than for involvement (8)….. the public life of business or politics. Widespread belief that women were intellectually inferior to men led most societies to (9)….. women’s education to learning domestic (10)…. . Well-educated, upper-class men controlled most positions of employment and power in society."

10. women’s education to learning domestic (10)…. .

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.

   Ever since humans have inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words and ideas. Tourists, the deaf, and the mute have no resort to this form of expression. Many of these symbols of the whole words are very picturesque and exact and can be used internationally: spelling, however, can not.

   Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the party is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.

   Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with fingertips), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide, warn and instruct people. While verbalization is the most common form of language, other systems and techniques also express human thoughts and feelings.

All of the following statements are true EXCEPT______________

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

"The status of women’s rights today (1)….. dramatically in different countries and, in some cases, am ong groups within the same country, such as ethnic groups or economic classes.
 In recent decades women around the world have made strides in political participation. (2)….. the 1980s women could vote virtually everywhere in the world, except for a few Muslim countries. As of mid-2005, when women in Kuwait won suffrage, women could vote in all countries (3)…. Men could vote except Saudi Arabia. The right to vote usually included the right to (4)….. for elected office. In 2005 there were 12 female national leaders in the world, including 8 heads of (5)…… (3 monarchs and 5 presidents) and 4 heads of government (prime ministers). In 2005 women made (6)….. almost 16 percent of legislative bodies worldwide, compared to 11 percent in 1999 and 9 percent in 1987. Despite these advancements, women’s role in governmental decision-making remains (7) …...
 Many disparities persist between women’s legal rights and their economic status. Women today constitute nearly 70 percent of the world’s poor, (8) …..  international efforts to compensate women and men (9)…..  in the workplace. While women made up about 32 percent of the world’s labor force in 1990, the percentage of women in positions to make important decisions was far lower. In 2002 women held only 15.7 percent of corporate (10)…… positions in the 500 largest companies in the United States - an increase of 7 percentage points since 1995. In the mid-1990s women comprised only 1 percent of executives in the 1,000 largest corporations outside the United States."

3. As of mid-2005, when women in Kuwait won suffrage, women could vote in all countries (3)…. Men could vote except Saudi Arabia.

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

"The status of women’s rights today (1)….. dramatically in different countries and, in some cases, am ong groups within the same country, such as ethnic groups or economic classes.
 In recent decades women around the world have made strides in political participation. (2)….. the 1980s women could vote virtually everywhere in the world, except for a few Muslim countries. As of mid-2005, when women in Kuwait won suffrage, women could vote in all countries (3)…. Men could vote except Saudi Arabia. The right to vote usually included the right to (4)….. for elected office. In 2005 there were 12 female national leaders in the world, including 8 heads of (5)…… (3 monarchs and 5 presidents) and 4 heads of government (prime ministers). In 2005 women made (6)….. almost 16 percent of legislative bodies worldwide, compared to 11 percent in 1999 and 9 percent in 1987. Despite these advancements, women’s role in governmental decision-making remains (7) …...
 Many disparities persist between women’s legal rights and their economic status. Women today constitute nearly 70 percent of the world’s poor, (8) …..  international efforts to compensate women and men (9)…..  in the workplace. While women made up about 32 percent of the world’s labor force in 1990, the percentage of women in positions to make important decisions was far lower. In 2002 women held only 15.7 percent of corporate (10)…… positions in the 500 largest companies in the United States - an increase of 7 percentage points since 1995. In the mid-1990s women comprised only 1 percent of executives in the 1,000 largest corporations outside the United States."

10. In 2002 women held only 15.7 percent of corporate (10)…… positions in the 500 largest companies in the United States - an increase of 7 percentage points since 1995.

DISAPPEARING ALASKAN SEALS
On a winter afternoon, a dozen male Northern fur seals are on an island off south-western Alaska. To look at them, fighting for territory on the rocks, it’s hard to imagine that they are at the (27)____________of a baffling scientific mystery: why is this species beginning to disappear? These seals- which can weigh up to 270 kilograms-have an important and symbolic (28)_________in Alaska’s history. Their soft and luxurious fur, the coveted prize during the huge commercial sea harvests that were legal here in the Bering Sea through the early 20th century, was once so valuable it (29)_________Alaska’s economy. Starting in the 1950s, for reasons that are (30)_______because the harvests by then tended to be fairly small, the seal population began a slow decline . But lately it has been falling drastically, declining at an alarming (31)________of 6 per cent a year since 1998. From a (32)_________ of more than 2 million in Alaska in 1948, their numbers have fallen to about 1 million.
So (33)________, no one has been able to establish a precise cause for this, although theories (34)___________. The seals' food supply may be (35)________, or another species may be (36)________on the seals- perhaps killer whales, which no longer have as many great whales to eat because of harvesting of those mammals. Some people have suggested that the decline can be (37)______to entanglement in fishing nets ,but scientists say they doubt that this alone could (38)_________the recent population decline.
(28)....................................

Read the following passage and choose the letter A, B, C or D to indicate the best answer to each of the following question.

Music can move the soul. It can be a very strong influence. Some music can calm us down but other music can make us wild! How does music affect us? Music is used in a variety of ways. It is used in the medical field as a source of research and as a sort of treatments as well. Music has been used as treatment to lower blood pressure, help ill children recover quickly, treat mental illness, treat depression, aid in healing, and reduce stress and insomnia and premature infants. Julius Portnoy, a musicolo­gist, found that it can change heart rates, increase or decrease blood pressure, effect energy levels, and digestion, positively or negatively, depending on the type of music. Calming music, such as classical musk, was found to have a very calming effect on the body, and cause the increase of endorphins, thirty minutes of such music was equal to the effect of a dose of valium. Both hemispheres of the brain are involved in processing music. The music in these studies is not the lyrics, but the music itself, the melody, the tones, the tunes, the rhythm, and the chords. Conversely music has also been documented to cause sickness. The right, or wrong music, can be like a poison to the body. Studies had been done on plants and the results were that loud hard rock music killed plants and soft classical music made the plants grow faster. Music is very pow­erful, like a drug and can even be an addiction. According to Patty Hearst, a researcher on music, it was documented that music was used in the aid of brainwashing some people. In the book, "Elevator Music" by Joseph Lanza, it is stated that certain types of strong music over prolonged periods in certain conditions were shown to cause seizures.

According to writer,_________.

Choose the letter A, B, C or D to complete the passage below

When people think of domestic abuse, they often focus __________ (1) domestic violence. But domestic abuse includes any attempt by one person in __________ (2) intimate relationship or marriage to dominate and control the other. Domestic violence and abuse are used for one purpose and one purpose only: __________ (3) and maintain total control over you. An abuser doesn’t “play fair.” Abusers use fear, guilt, shame, and intimidation to wear you down and keep you under __________ (4) thumb.

__________ (5) violence and abuse can happen to anyone; it does not discriminate. Abuse happens within heterosexual relationships and in same-sex partnerships. It __________ (6) within all age ranges, ethnic backgrounds, and economic levels. And __________ (7) women are more often victimized, men also experience abuse—especially verbal and emotional. The bottom line is that abusive behavior is never __________ (8), whether from a man, woman, teenager, or an older adult. You deserve to feel valued, respected, and safe.

Domestic abuse often escalates __________ (9) threats and verbal assault to violence. And while physical injury may pose the most obvious danger, the emotional and psychological consequences of domestic abuse are also severe. Emotionally abusive relationships can destroy your self-worth, __________ (10) to anxiety and depression, and make you feel helpless and alone. No one should have to endure this kind of pain—and your first step to breaking free is recognizing that your relationship is abusive.

(10).........................

Read the passage and choose the best answers. 
Until the 19th century, the denial of equal rights to women met with only occasional protest and drew little attention from most people. Because most women lacked the educational and economic resources that would enable them to challenge the prevailing social order, women generally accepted their inferior status as their only option. At this time, women shared these disadvantages with the majority of working class men, as many social, economic, and political rights were restricted to the wealthy elite.In the 19th century, as governments in Europe and North America began to draft new laws guaranteeing equality among men, significant numbers of women – and some men – began to demand that women be accorded equal rights as well.
At the same time, the Industrial Revolution in Europe and North America further divided the roles of men and women. Before the Industrial Revolution most people worked in farming or crafts-making, both of which took place in or near the home. Men and women usually divided the numerous tasks among themselves and their children. Industrialization led male workers to seek employment outside of the home in factories and other large-scale enterprises. The growing split between home and work reinforced the idea that women’s “rightful place” was in the home, while men belonged in the public world of employment and politics.
Organized efforts by women to achieve greater rights occurred in two major waves. The first wave began around the mid-19th century, when women in the United States and elsewhere campaigned to gain suffrage that is, the right to vote. This wave lasted until the 1920s, when several countries granted women suffrage

What was the aim of the women’s movement in the United States in the 1920s?

Fill in each numbered blank with one suitable word or phrase. In  the  1960s  the  women's  liberation  movement  (1)  _____  suddenly  into  the  public  consciousness  and  quickly  grew  into  (2)  _____ largest  social movement  in the history  of  the  United  States.  Women's  liberation movement  was  a  continuation  of  the  19-century  women's rights movement. The movement's major (3) _____ has included not only legal, economic, and political gains (4) _____ also has changed the  ways  in  which  people  live,  dress,  dream  of  their  future,  and  (5)  ___  a  living.  About  health,  for  example,  many  male  physicians and hospital  have  made  major  improvements  in  the  (6)  _____  of  women;  more  and  more  women  have  become  doctors  and  succeeded  (7) _____  their  medical  research;  and  diseases  such  as  breast  cancer,  which  affects  many  women,  now  receive  better funding  and  treatment, thanks to women's (8) ___. Feminists have insisted that violence against women become a political issue. The women's liberation movement has also made changes in education: curricula and (9) _____ have been written to promote equal opportunity for girls and women; more and more female students are admitted to universities and professional schools.The  women's  liberation  movement  brought  about  a  radical  change  in  society  (10)  _____  it  took  a  decade  for  the  movement  to  reach women's awareness.

(3)  _____

Read the passage and choose the best answers. 

Until the 19th century, the denial of equal rights to women met with only occasional protest and drew little attention from most people. Because most women lacked the educational and economic resources that would enable them to challenge the prevailing social order, women generally accepted their inferior status as their only option. At this time, women shared these disadvantages with the majority of working class men, as many social, economic, and political rights were restricted to the wealthy elite.In the 19th century, as governments in Europe and North America began to draft new laws guaranteeing equality among men, significant numbers of women – and some men – began to demand that women be accorded equal rights as well.
At the same time, the Industrial Revolution in Europe and North America further divided the roles of men and women. Before the Industrial Revolution most people worked in farming or crafts-making, both of which took place in or near the home. Men and women usually divided the numerous tasks among themselves and their children. Industrialization led male workers to seek employment outside of the home in factories and other large-scale enterprises. The growing split between home and work reinforced the idea that women’s “rightful place” was in the home, while men belonged in the public world of employment and politics.
Organized efforts by women to achieve greater rights occurred in two major waves. The first wave began around the mid-19th century, when women in the United States and elsewhere campaigned to gain suffrage that is, the right to vote. This wave lasted until the 1920s, when several countries granted women suffrage

Why did the denial of equal rights to women draw little attention from the society until the 19th century?

Read the following passage and mark the letter A, B, C or D to indicate the correct answer for each of the blanks from 6 to 15

 
Revising for exams is not as easy as it looks. You will need to work out which routine suits you best, and then stick to it. Some people like studying at night when it’s quiet, whereas others find the early morning is a good time to get things done. You might enjoy (6)…….. to music while you revise, but this can be (7)……... Can you really concentrate (8)……….. two things at once? So think (9)……… you turn your radio on. Your (10)…….. is also important while you are revising. This may be a more than usually (11)………. period of your life, when you should take extra care to eat properly. No missed meals, or junk food, or (12)…….cups of coffee! Get plenty of exercise as well. If you have got fed up with (13)……. you’re doing, or find it hard to concentrate, go for a walk to clear your head. (14)……. exercise will help to keep your body fit and your brain working (15)………… Finally, you also need to take time off. Go out occasionally, see your friends, and make time to relax. Then you will return to your studies fresh and full of enthusiasm.

8.......................

Read the passage and choose the correct answer:

On the provincial level, some women in Canada could vote beginning in 1916. Suffrage expanded to the federal level over the next few years: In 1917 nurses and women in the armed forces could vote, then women whose fathers, husbands, or sons were serving overseas. In 1918 legislation passed expanding suffrage to female citizens excluding Asian-Canadian women and First Nation women, who did not win the right to vote until the 1940s and 1960s, respectively.

Non-indigenous women in Australia got the right to vote beginning in 1895, when the state of South Australia passed colony- and state-wide suffrage, in addition to the right to stand for parliament. In 1899, state suffrage expanded to Western Australia. In 1902, non-indigenous women won the right to vote on the federal level with the passing of the Commonwealth Franchise Act. Indigenous Australians didn't get the federal right to vote until 1962.

 The state of South Australia passed colony- and state-wide suffrage in 1895.

Read the following passage and mark the letter A, B, C or D to indicate the correct answer for each of the blanks from 6 to 15

 
Revising for exams is not as easy as it looks. You will need to work out which routine suits you best, and then stick to it. Some people like studying at night when it’s quiet, whereas others find the early morning is a good time to get things done. You might enjoy (6)…….. to music while you revise, but this can be (7)……... Can you really concentrate (8)……….. two things at once? So think (9)……… you turn your radio on. Your (10)…….. is also important while you are revising. This may be a more than usually (11)………. period of your life, when you should take extra care to eat properly. No missed meals, or junk food, or (12)…….cups of coffee! Get plenty of exercise as well. If you have got fed up with (13)……. you’re doing, or find it hard to concentrate, go for a walk to clear your head. (14)……. exercise will help to keep your body fit and your brain working (15)………… Finally, you also need to take time off. Go out occasionally, see your friends, and make time to relax. Then you will return to your studies fresh and full of enthusiasm.

15......................

As many as one thousand years ago in the Southwest, the Hopi and Zuni Indians of North America were building with adobe-sun-baked brick plastered with mud.  Their homes looked remarkably like modern apartment houses. Some were four stories high and contained quarters for perhaps a thousand people, along with storerooms for grain and other goods. These buildings were usually put up against cliffs, both to make construction easier and for defense against enemies. They were really villages in themselves, as later Spanish explorers must have realised since they called them "pueblos", which is Spanish for towns. The people of the pueblos raised what are called "the three sisters" - corn,  beans, and squash. They made excellent pottery and wove marvelous baskets, some so fine that they could hold water. The Southwest has always been a dry country, where water is scarce. The Hopi and Zuni brought water from streams to their fields and gardens through irrigation ditches. Water was so important that it played a major role in their religion. They developed elaborate ceremonies and religious rituals to bring rain. The way of life of less - settled groups was simpler and more strongly influenced by nature.
Small tribes such as the Shoshone and Ute wandered the dry and mountainous lands between the Rocky Mountains and the Pacific Ocean. They gathered seeds and hunted small animals such as rabbits and snakes.
In the Far North, the ancestors of today's Inuit hunted seals, walruses, and the great whales. They lived right on the frozen season shelters called igloos built of blocks of packed snow. When summer came, they fished for salmon and hunted the lordly caribou.
The Cheyenne, Pawnee and Sioux tribes, known as the Plains Indians, lived on the grasslands between the Rocky Mountains and the Mississippi River. They hunted bison, commonly called the buffalo. Its meat was the chief food of these tribes, and its hide was used to make their clothing and the covering of their tents and tepees.

The author uses the phrase "the three sisters" refers 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 31 to 35.
In recent years there have (31)_________many articles on air polution in newspapers and magazines. Scientists all over the world have warned that our atmosphere is becoming more and more contaminated, and that Man, through his carelessness, may run (32)_________of pure air to breathe.
Automobiles and industries mainly account (33)_________air pollution in most cities. They pour into the air such gases as carbon monoxide, sulphur and nitrogen oxides, which are very harmful (34)_________humans. Worrse still, these gases, a series of chemical changes, turn into toxic acids. They fall down in "acid rains", raising the acidity in the air, soil and water to dangerous levels and affecting not only tress but also fish and other wildlife. Many industrial countries in Europe and North America have suffered bad effects (35) ________  those "rains”.
(32).................

Just as optical fibers have transformed communication, they are also revolutionizing medicine. These ultrathin, flexible fibers have opened a window into the living tissues of the body. By inserting optical fibers through natural openings or small incisions and threading  them along the body's established pathways, physicians can look into the lungs, intestines,  heart and other areas that were formerly inaccessible to   them.
The basic fiber-optics system is called fiberscope, which consists of  two  bundles  of fibers. One, the illuminating bundle, carries light to the tissues. Is is coupled to  a  high- intensity light source. Light enters the cores of the high-purity silicon glass and travels along the fibers. A lens at the end of the bundle collects the light and  focuses  it into the other  bundle, the imaging bundle. Each fiber in the bundle transmits only a tiny fraction of the total image. The reconstructed image can be viewed through an eyepiece or displayed on a television screen.
During the last five years, improved methods of fabricating optical fibers have led to a reduction in fiberscope diameter and an increase in the number of fibers, which in turn has increased resolution. Optical fibers can also be used to deliver laser light. By use of laser beams, physicians can perform surgery inside the body, sometimes eliminating the need for invasive procedures in which healthy tissue must be cut through to reach the site of disease. Many of these procedures do not require anesthesia and can be performed in a physician's office. These techniques have reduced the risk and the cost of medical care.

In line 2, the author uses the expression have opened a window to indicate that the use of optical fibers

Even before the turn of the century, movies began to develop in two major directions: the realistic and the formalistic Realism and formalism are merely general, rather than absolute, terms. When used to suggest a tendency toward either polarity, such labels can be helpful, but in the end they are still just labels. Few films are exclusively formalist in style, and fewer yet are completely realist. There is also an important difference between realism and reality, although this distinction is often forgotten. Realism is a particular style, whereas physical reality is the source of all the raw materials of film, both realistic and formalistic. Virtually all movie directors go to the photographable world for their subject matter, but what they do with this material - how they shape and manipulate it - determines their stylistic emphasis.
Generally speaking, realistic films attempt to reproduce the surface of concrete reality with a minimum of distortion. In photographing objects and events, the filmmaker tries to suggest the copiousness of life itself. Both realist and formalist film directors must select (and hence emphasize) certain details from the chaotic sprawl of reality. But the element of selectivity in realistic films is less obvious. Realists, in short, try to preserve the illusion that their film world is unmanipulated, an objective mirror of the actual world. Formalists, on the other hand, make no such pretense. They deliberately stylize and distort their raw materials so that only the very naive would mistake a manipulated image of an object or event for the real thing.
We rarely notice the style in a realistic movie; the artist tends to be self-effacing. Some filmmakers are more concerned with what is being shown than how it is manipulated. The camera is used conservatively. It is essentially a recording mechanism that reproduces the surface of tangible objects with as little commentary as possible. A high premium is placed on simplicity, spontaneity, and directness. This is not to suggest that these movies lack artistry, however, for at its best the realistic cinema specializes in art that conceals art

How can one recognize the formalist style?