Stars have been significant features in the design of many United States coins and their number has varied from one to forty-eight stars. Most of the coins issued from about 1799 to the early years of the twentieth century bore thirteen stars representing the thirteen original colonies. Curiously enough, the first American silver coins, issued in 1794, had fifteen stars because by that time Vermont and Kentucky has joined the Union. At that time it was apparently the intention of mint officials to add a star for each new state. Following the admission of Tennessee in 1796, for example, some varieties of half dimes, dimes, and half-dollars were produced with sixteen starts. As more states were admitted to the Union, however, it quickly became apparent that this scheme would not prove practical and the coins from A798 on were issued with only thirteen stars-one for each ofthe original colonies. Due to an error at the mint, one variety of the A828 half cent was issued with only twelve stars. There is also a variety of the large cent with only A2 stars, but this is the result of a die breakand is not a true error.

The expression “Curiously enough” is used because the author finds it strange that _______ .

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 following questions.

SCIENCE FLYING IN THE FACE OF GRAVITY

It looked just like another aircraft from the outside. The pilot told his young passengers that it was built in 1964, a Boeing KC-135 refueling tanker, based on the 707. But appearances were deceptive, and the 13 students from Europe and the USA who boarded the aircraft were in for the flight of their lives.

Inside, the area that normally had seats had become a long white tunnel. Heavily padded from floor to ceiling; it looked a bit like a lunatic asylum. There were almost no windows, but lights along the padded walls eerily illuminated it. Most of the seats had been taken out apart from a few at the back, where the young scientists quickly took their places with a look of apprehension.

From 12 months, science students from across the continents had competed to win a place on the flight at the invitation of the European Space Agency. The challenge had been to suggest imaginative experiments to be conducted in weightless conditions. For the next two hours the Boeing's flight resembled that of an enormous bird which had lost its reason, shooting upwards towards the heavens before hurting towards Earth. The intention was to achieve weightlessness for a few seconds.

The aircraft took off smoothly enough, but any feelings that I and the young scientists had that we were on anything like a scheduled passenger service were quickly dismissed when the pilot put the plane into a 45-degree climb which lasted around 20 seconds. Then the engine cut out and we became weightless. Everything became confused, and left or right, up or down no longer had any meaning. After 10 seconds of free-fall descent, the pilot pulled the aircraft out of its nosedive. The return of gravity was less immediate than its loss, but was still sudden enough to ensure that some students came down with a bump. After two hours of going up and down in the plane doing experiments, the predominant feeling was one of exhilaration rather than nausea. Most of the students thought it was an unforgettable experience and one they would be keen to repeat.

What does the writer say about the plane?

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: 
Any list of the greatest thinkers in history contains the name of the brilliant German physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers. The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe. The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = m(cc), known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas. He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D. Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.

Einstein was a citizen of all of the following countries EXCEPT ________ 

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: 
The growth of cities, the construction of hundreds of new factories, and the spread of railroads in the United Stases before 1850 had increased the need for better illumination. But the lighting in  American homes had improved very little over that of ancient times. Through the colonial period,  homes were lit with tallow candles or with a lamp of the kind used in ancient Rome- a dish of fish oil or  other animal or vegetable oil in which a twisted rag served as a wick. Some people used lard, but they  had to heat charcoal underneath to keep it soft and burnable. The sperm whale provided superior  burning oil, but this was expensive. In 1830 a new substance called "camphene" was patented, and  it proved to be an remained expensive, had an unpleasant odor, and also was dangerously explosive.
Between 1830 and 1850 it seemed that the only hope for cheaper illumination in the United  States was the wider use of gas. In the 1840s American gas manufacturers adopted improved British  techniques for producing illuminating gas from coal. But the expense of piping gas to the consumer  remained so high that until mid- century gas lighting was feasible only in urban areas, and only for  public buildings for the wealthy. In 1854 a Canadian doctor, Abraham Gesner, patented a process for  distilling a pitch like mineral found in New Brunswick and Nova Scotia that produced illuminating  gas and an oil that he called "kerosene" (from "keros", the Greek word for wax, and "ene" because  it resembled camphene). Kerosene, though cheaper than camphene, had an unpleasant odor, and  Gesner never made his fortune from it. But Gesner had aroused a new hope for making illuminating oil from a product coming out of North American mines.

What can be inferred about the illuminating gas described in the paragraph?

Read the following passage and choose the best answer for each blank.

(1) _____ history, women have always aimed for a recognized place in (2) _____. Guided by their own (3) _____ of knowledge and expertise,  women  like  Marie  Curie  in  science,  Mary  Wollstonecraft  in  literary  writing,  Simone  de  Beauvois  in  philosophical  existentialist debate, and Marie Stopes, in medicine, to name a few, have brought about (4) _____ awareness of the role of  women in any walks of life. These  women  have  helped  redefine  and  (5)  _____  the  nature  of  women's  place  in  society.  Today  the  (6)  _____  of  global  women's organizations and the impact of  women's contributions (7) _____ society  show that progress has been made and the progress in furthering the role of  women in society has been some benefit to the (8) _____ woman. It is true to say that not all women have the same need. The need of the woman who stays at home and (9) _____ children will differ  widely  from the woman who works outside. Nonetheless, in the extensive field of equal opportunities, it would be good to know that access is given to both with equal measure according to the true value of respective abilities. It also would be good to know that the woman at home is recognized as a valued (10) _____ of society just as much as the one who deals on business outside the home.

(7) _____

Read the following passage and choose the best answer for each blank.

(1) _____ history, women have always aimed for a recognized place in (2) _____. Guided by their own (3) _____ of knowledge and expertise,  women  like  Marie  Curie  in  science,  Mary  Wollstonecraft  in  literary  writing,  Simone  de  Beauvois  in  philosophical  existentialist debate, and Marie Stopes, in medicine, to name a few, have brought about (4) _____ awareness of the role of  women in any walks of life. These  women  have  helped  redefine  and  (5)  _____  the  nature  of  women's  place  in  society.  Today  the  (6)  _____  of  global  women's organizations and the impact of  women's contributions (7) _____ society  show that progress has been made and the progress in furthering the role of  women in society has been some benefit to the (8) _____ woman. It is true to say that not all women have the same need. The need of the woman who stays at home and (9) _____ children will differ  widely  from the woman who works outside. Nonetheless, in the extensive field of equal opportunities, it would be good to know that access is given to both with equal measure according to the true value of respective abilities. It also would be good to know that the woman at home is recognized as a valued (10) _____ of society just as much as the one who deals on business outside the home.

(6) _____

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, _______.

Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction. 
Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth. 
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space. The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.

According to the passage, why do ants use different compounds as trail pheromones?

Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction. 
Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth. 
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space. The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.

What does the passage mainly discuss?' 

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.
(27)....................................

In addition to their military role, the forts of the nineteenth century provided numerous other benefits for the American West. The establishment of these posts opened new roads and provided for the protection of daring adventurers and expeditions as well as established settlers. Forts also served as bases where enterprising entrepreneurs could bring commerce to the West, providing supplies and refreshments to soldiers as well as to pioneers. Posts like Fort Laramie provided supplies for wagon trains traveling the natural highways toward new frontiers. Some posts became stations for the pony express; still others, such as Fort Davis, were stagecoach stops for weary travelers. All of these functions, of course, suggest that the contributions of the forts to the civilization and development of the West extended beyond patrol duty.
 Through the establishment of military posts, yet other contributions were made to the development of western culture. Many posts maintained libraries or reading rooms, and some – for example, Fort Davis – had schools. Post chapels provided a setting for religious services and weddings. Throughout the wilderness, post bands provided entertainment and boosted morale. During the last part of the nineteenth century, to reduce expenses, gardening was encouraged at the forts, thus making experimental agriculture another activity of the military. The military stationed at the various forts also played a role in civilian life by assisting in maintaining order, and civilian officials often called on the army for protection.
 Certainly, among other significant contributions the army made to the improvement of the conditions of life was the investigation of the relationships among health, climate, and architecture. From the earliest colonial times throughout the nineteenth century, disease ranked as the foremost problem in defense. It slowed construction of forts and inhibited their military functions. Official documents from many regions contained innumerable reports of sickness that virtually incapacitated entire garrisons. In response to the problems, detailed observations of architecture and climate and their relationships to the frequency of the occurrence of various diseases were recorded at various posts across the nation by military surgeons.

The word “inhibited” in line 9 is closest in meaning to _______.

Choose the option among  A, B, C or D that best answers the question about the passage:

"Since the 1940s, most international women’s rights efforts have been organized by the Commission on the Status of Women (CSW), an office established in 1947 by the United Nations (UN). The Commission is the only existing intergovernmental body that issues reports on and recommendations for the promotion of women’s political, social, economic, and cultural rights. The CSW also acts as an advocate for women’s rights and can urge immediate international action in cases of severe violations of women’s rights.
 The UN encouraged equality in the workplace for men and women when it sponsored the Convention Concerning Equal Remuneration for Men and Women Workers for Work of Equal Value in 1953 and the Convention Concerning Discrimination in Respect of Employment and Occupation in 1960. Over 100 countries ratified these measures. In 1975 the UN launched the Decade for Women, a ten-year effort to focus on women’s issues. From 1975 to 1985 international groups formed a series of conferences organized around the themes of equality, development, and peace. The conferences took place throughout the world and drew leaders and delegates from developing and industrialized nations alike. The Decade for Women culminated in the 1985 UN Nairobi Conference, held in Nairobi, Kenya, which was attended by 375 delegations of women from nations around the world.
 The United Nations’ Fourth World Conference on Women was held in Beijing, China, in 1995. Over 17,000 people registered for the event, including delegates from nearly 200 countries. The Platform for Action that emerged from the conference focused on the removal of obstacles to women’s equal participation in society. The most controversial sections of the platform concerned reproductive rights, particularly the right to have an abortion. The final document declared that “the ability of women to control their own fertility forms, an important basis for the enjoyment of other rights,” and asserted the right of women and men to have access to all legal methods of fertility regulation."

1. What are the functions of the Commission on the Status of Women (CSW)?

Read the following passage and choose the best answer for each blank.

(1) _____ history, women have always aimed for a recognized place in (2) _____. Guided by their own (3) _____ of knowledge and expertise,  women  like  Marie  Curie  in  science,  Mary  Wollstonecraft  in  literary  writing,  Simone  de  Beauvois  in  philosophical  existentialist debate, and Marie Stopes, in medicine, to name a few, have brought about (4) _____ awareness of the role of  women in any walks of life. These  women  have  helped  redefine  and  (5)  _____  the  nature  of  women's  place  in  society.  Today  the  (6)  _____  of  global  women's organizations and the impact of  women's contributions (7) _____ society  show that progress has been made and the progress in furthering the role of  women in society has been some benefit to the (8) _____ woman. It is true to say that not all women have the same need. The need of the woman who stays at home and (9) _____ children will differ  widely  from the woman who works outside. Nonetheless, in the extensive field of equal opportunities, it would be good to know that access is given to both with equal measure according to the true value of respective abilities. It also would be good to know that the woman at home is recognized as a valued (10) _____ of society just as much as the one who deals on business outside the home.

(8) _____

The handling and delivery of mail has always been a serious business, underpinned by the trust of the public in requiring timeliness, safety, and confidentiality. After early beginnings using horseback and stagecoach, and although cars and trucks later replaced stagecoaches and wagons, the Railway Mail Service still stands as one of America’s most resourceful and exciting postal innovations. This service began in 1832, but grew slowly until the Civil War. Then from 1862, by sorting the mail on board moving trains, the Post Office Department was able to decentralize its operations as railroads began to crisscross the nation on a regular basis, and speed up mail delivery. This service lasted until 1974. During peak decades of service, railway mail clerks handled 93% of all non-local mail and by 1905 the service had over 12,000 employees. 
Railway Post Office trains used a system of mail cranes to exchange mail at stations without stopping. As a train approached the crane, a clerk prepared the catcher arm which would then snatch the incoming mailbag in the blink of an eye. The clerk then booted out the outgoing mailbag. Experienced clerks were considered the elite of the Postal Service’s employees, and spoke with pride of making the switch at night with nothing but the curves and feel of the track to warn them of an upcoming catch. They also worked under the greatest pressure and their jobs were considered to be exhausting and dangerous. In addition to regular demands of their jobs they could find themselves the victims of train wrecks and robberies. 
As successful as it was, “mail-on-the-fly” still had its share of glitches. If they hoisted the train’s catcher arm too soon, they risked hitting switch targets, telegraph poles or semaphores, which would rip the catcher arm off the train. Too late, and they would miss an exchange. 

Which of the following is TRUE according to the passage?

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.

According to the passage, the Hopi and Zuni typically built their homes....................

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.
(34)....................................

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 ‌16‌ ‌to‌ ‌20.‌ ‌
Dressing‌ ‌up‌ ‌in‌ ‌costumes‌ ‌and‌ ‌trick-or-treating‌ ‌are‌ ‌popular‌ ‌Halloween‌ ‌activities,‌ ‌but‌ ‌few‌ ‌probably‌ ‌(‌16‌)‌ ‌______‌ ‌these‌ ‌lighthearted‌ ‌fall‌ ‌traditions‌ ‌with‌ ‌their‌ ‌origins‌ ‌in‌ ‌Samhain,‌ ‌a‌ ‌three-day‌ ‌ancient‌ ‌Celtic‌ ‌pagan‌ ‌festival.‌ ‌
For‌ ‌the‌ ‌Celts,‌ ‌who‌ ‌lived‌ ‌during‌ ‌the‌ ‌Iron‌ ‌Age‌ ‌in‌ ‌what‌ ‌is‌ ‌now‌ ‌Ireland,‌ ‌Scotland,‌ ‌the‌ ‌U.K.‌ ‌and‌ ‌(‌17‌)‌ ‌______‌ ‌parts‌ ‌of‌ ‌Northern‌ ‌Europe,‌ ‌Samhain‌ ‌(meaning‌ ‌literally,‌ ‌in‌ ‌modern‌ ‌Irish,‌ ‌“summer's‌ ‌end”)‌ ‌marked‌ ‌the‌ ‌end‌ ‌of‌ ‌summer‌ ‌and‌ ‌kicked‌ ‌off‌ ‌the‌ ‌Celtic‌ ‌new‌ ‌year.‌ ‌Ushering‌ ‌in‌ ‌a‌ ‌new‌ ‌year‌ ‌signaled‌ ‌a‌ ‌time‌ ‌of‌ ‌both‌ ‌death‌ ‌and‌ ‌rebirth,‌ ‌something‌ ‌that‌ ‌was‌ ‌doubly‌ ‌symbolic‌ ‌because‌ ‌it‌ ‌(‌18‌)‌ ‌______‌ ‌with‌ ‌the‌ ‌end‌ ‌of‌ ‌a‌ ‌bountiful‌ ‌harvest‌ ‌season‌ ‌and‌ ‌the‌ ‌beginning‌ ‌of‌ ‌a‌ ‌cold‌ ‌and‌ ‌dark‌ ‌winter‌ ‌season‌ ‌that‌ ‌would‌ ‌present‌ ‌plenty‌ ‌of‌ ‌challenges.‌ ‌
Eventually,‌ ‌Halloween‌ ‌became‌ ‌more‌ ‌popular‌ ‌in‌ ‌secular‌ ‌culture‌ ‌than‌ ‌All‌ ‌Saints'‌ ‌Day.‌ ‌The‌ ‌pagan-turned-‌ ‌Christian‌ ‌practices‌ ‌of‌ ‌dressing‌ ‌up‌ ‌in‌ ‌costumes,‌ ‌playing‌ ‌pranks‌ ‌and‌ ‌handing‌ ‌out‌ ‌offerings‌ ‌have‌ ‌evolved‌ ‌into‌ ‌popular‌ ‌traditions‌ ‌even‌ ‌for‌ ‌those‌ ‌(‌19‌)‌ ‌______‌ ‌may‌ ‌not‌ ‌believe‌ ‌in‌ ‌otherworldly‌ ‌spirits‌ ‌or‌ ‌saints.‌ ‌(‌20‌)‌ ‌______,‌ ‌whether‌ ‌Halloween‌ ‌celebrants‌ ‌know‌ ‌it‌ ‌or‌ ‌not,‌ ‌they’re‌ ‌following‌ ‌the‌ ‌legacy‌ ‌of‌ ‌the‌ ‌ancient‌ ‌Celts‌ ‌who,‌ ‌with‌ ‌the‌ ‌festival‌ ‌of‌ ‌Samhain,‌ ‌celebrated‌ ‌the‌ ‌inevitability‌ ‌of‌ ‌death‌ ‌and‌ ‌rebirth.‌ ‌

Question‌ ‌18‌‌ ‌‌(TH):‌ ‌...................

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 following questions.

SCIENCE FLYING IN THE FACE OF GRAVITY

It looked just like another aircraft from the outside. The pilot told his young passengers that it was built in 1964, a Boeing KC-135 refueling tanker, based on the 707. But appearances were deceptive, and the 13 students from Europe and the USA who boarded the aircraft were in for the flight of their lives.

Inside, the area that normally had seats had become a long white tunnel. Heavily padded from floor to ceiling; it looked a bit like a lunatic asylum. There were almost no windows, but lights along the padded walls eerily illuminated it. Most of the seats had been taken out apart from a few at the back, where the young scientists quickly took their places with a look of apprehension.

From 12 months, science students from across the continents had competed to win a place on the flight at the invitation of the European Space Agency. The challenge had been to suggest imaginative experiments to be conducted in weightless conditions. For the next two hours the Boeing's flight resembled that of an enormous bird which had lost its reason, shooting upwards towards the heavens before hurting towards Earth. The intention was to achieve weightlessness for a few seconds.

The aircraft took off smoothly enough, but any feelings that I and the young scientists had that we were on anything like a scheduled passenger service were quickly dismissed when the pilot put the plane into a 45-degree climb which lasted around 20 seconds. Then the engine cut out and we became weightless. Everything became confused, and left or right, up or down no longer had any meaning. After 10 seconds of free-fall descent, the pilot pulled the aircraft out of its nosedive. The return of gravity was less immediate than its loss, but was still sudden enough to ensure that some students came down with a bump. After two hours of going up and down in the plane doing experiments, the predominant feeling was one of exhilaration rather than nausea. Most of the students thought it was an unforgettable experience and one they would be keen to repeat.

What does the word it in the last paragraph refer to?

Rock carvings suggest that Stone Age people were hunting whales for food as early as 2,200 B.C. Such (31)______ hunting is still practised today in a number of societies including the Inuit people of Greenland and North America. Whaling became big (32)_____________ from the seventeenth century as the demand for whale bone and whale oil rose, and the humpback and sperm whales were hunted in increasing large number. (33)_________ just as stocks of these species began to fall, the explosive harpoon gun was invented. This weapon, together with the development of steam-powered ships, enable the whaler to hunt the fast moving fin and blue whales. In 1905, the whaling (34)____________ moved the water of Antarctica. The introduction of massive factory ships enabled the whales to be processed at sea. As a result, the blue whale had virtually disappeared by the 1950s. In 1946, The International Whaling Commision was established to maintain the declining whale populations. Quotas were set but these were often ignored and the numbers continued to fall. Hunting of many species continued until 1986 when the IWC finally responded to international (35)____________ and a band on commercial whaling was introduced.
(32).......................................

Sunlight offers many ways to get energy. A window can allow warm sunlight into your room. Solar water-heating systems can use sunlight to warm the water for your home, swimming pool and school. Sunlight also warms the Earth and causes wind. Electricity can be made by wind generators. 
Photovoltaic, or PV system use a type of material that converts sunlight into electricity. PV systems can power your air conditioner or a satellite like the International Space Station. PV systems are also used to run a calculator, recharge cell phone, or even power lightweight cars. 
Sunlight is also changed into electricity by concentrating solar power or CSP systems. CSP systems have mirrors that focus the sunlight. The concentrated sunlight turns water into steam which turns a turbine that is connected to an electric generator. A CSP system usually uses sunlight to make steam. CSP power plants can store large amount of heat. The stored heat is used to make electricity at night. During cloud days, many CSP plants can also burn natural gas to provide the heat that is used to turn water into steam. 
Sunlight provides the energy needed to grow plants and make large amount of environmentally friendly heat and electricity. Solar energy can provide power today and for a long time in the future. 

In the fourth paragraph, the word “which” refers to _______ 

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)....................................