Read the passage and choose the best answer.

Scientists believe they now have scientific evidence to prove that ecosystems work better when there is greater variety of species within them. This biodiversity is being lost destroying natural mechanisms that could repair the damage caused by man.

Findings show that losing plants and animals is not only reducing our quality of life but actually endangering our very existence. We cut down rich rainforests and replace them with one species of plantations, such as pine and eucalyptus. We plough up meadows rich in different grasses and herbs and replace them with one grass, for instance rye or wheat.

When a natural ecosystem is simplified the basic processes in the ecosystem are altered and even damaged. Without their biodiversity, they are not able to serve as the natural cleaners of our planet. No longer are they able to absorb the carbon dioxide that is being produced in excess. The result is global warming, caused by the increase in the 'greenhouse effect', and ultimately, or even 'sooner, there will be' a change in the world's climate.

What, according to the passage, might be the final result of the simplification of natural ecosystems?

Read the following passage and choose the best answer (A, B, C, D):
The United Nations is an international organization founded in 1945. It is currently made up of 193 member countries. Its main goal is to bring different nations together to promote peace and justice in the world. The UN also works to make the world a safe and secure place. It is important to remember that the UN is not a “world government”. This means that the UN does not make laws for different countries to follow. However, the UN does hold regular votes on global policies and issues. The main branch of the UN is called the “General Assembly”. All members of the United Nations are represented and have their votes. If there is a problem in a certain area of the world or a particular country, the UN will vote on how to best solve the problem. At least two-thirds of all member countries must agree on how to resolve the problem in order for the UN to take action. If less than two-thirds of the voting countries agree, no immediate action is taken. Another branch is the Security Council. Its main purpose is to maintain international peace and keep the world secure. This branch has only fifteen members, five of which are permanent, including China, France, Russia, the United Kingdom, and the United States. The other ten members are elected by the General Assembly for two-year terms. IF the council feels that international peace is being threatened, the fifteen members will try to outline a way to resolve the situation in a peaceful manner. The third important branch is the Economic and Social Council. This branch works to help monitor the world economy and resolve social issues around the world such as violations of human rights, the fight against international crime and destruction of the environment. There are 54 government representatives serving on this council. They are elected by the General Assembly to serve for three-year terms. Council members are elected to represent certain areas of the world. 
5. What does the author imply when he explains that the UN is not a “world government”?

Identify the one underlined word or phrase - A, B, C or D - that must be changed for the sentence to be correct.

 During a curfew it is not possible walking on the streets after a specified hour.

Read the following passage and choose the best answer (A, B, C, D):
Fifty-five delegates representing all thirteen states except Rhode Island attended the Constitutional Convention in Philadelphia from May to September 1787. The delegates had been instructed by the Continental Congress to revise the old Articles of Confederation, but most believed that a stronger central government was needed. There were differences, however, about what structure the government should take and how much influence large states should have. Virginia was by far the most populous state, with twice as many as people as New York, four times as many as New Jersey, and ten times as many as Delaware. The leader of the Virginia delegation, James Madison, had already drawn up a plan for government, which became known as the Large State Plan. Its essence was that congressional representation would be based on population. It provided for two or more national executives. The smaller states feared that under this plan, a few large states would lord over the rest. New Jersey countered with the Small State Plan. It provided for equal representation for all states in a national legislature and for a single national executive. Angry debate, heightened by a stifling heat wave, led to deadlock. A cooling of tempers seemed to come with lower temperatures. The delegates hammered out an agreement known as the Great Compromise - actually a bundle of shrewd compromises. They decided that Congress would consist of two houses. The larger states were granted representation based on population in the lower house, the House of Representatives. The smaller states were given equal representation in the upper house, the Senate, in which each state would have two senators regardless of population. It was also agreed that there would be a single executive, the president. This critical compromise broke the logjam, and from then on, success seemed within reach.
8. Which of the following is NOT given in the passage as one of the provisions of the Great Compromise?

Read the following passage and choose the best answer (A, B, C, D):
Simply being bilingual doesn’t qualify someone to interpret. Interpreting is not only a mechanical process of converting one sentence in language A into the same sentence in language B. Rather, its a complex art in which thoughts and idioms that have no obvious counterparts from tongue to tongue - or words that have several meanings must be quickly transformed in such a way that the message is clearly and accurately expressed to the listener. At one international conference, an American speaker said, “You can’t make a silk purse out of a sows ear”, which meant nothing to the Spanish audience. The interpretation was, “A monkey in a silk dress is still a monkey” - an idiom the Spanish understood and that expressed the same idea. There are 2 kinds of interpreters, simultaneous and consecutive. The former, sitting in a separated booth, usually at a large multilingual conference, speaks to listeners wearing headphones, interpreting what a foreign language speaker says - actually a sentence behind. Consecutive interpreters are the ones most international negotiations use. They are employed for smaller meetings without sound booths and headphones. Consecutive interpretation also requires two-person teams. A foreign speaker says his piece while the interpreter, using a special shorthand, takes notes and during a pause, tells the client what was said. 
7. The phrase “the former” in paragraph 3 refers to: 

Read the following passage and choose the best answer (A, B, C, D):
You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar ? Much research on emotional expressions has centered on such questions. According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same “facial language”. Studies by Ekman’s group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far-flung places as Argentina, Japan, Spain, Hungary, Poland, Sumatra, the United States, Vietnam, the jungles of New Guinea, and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays – the so-called display responses – expecially negative ones – while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree, in people’s behavior. From their first days in life, babies produce facial expressions that communicate their feelings. The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people’s faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Chales Dawin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross-cultural psychologists tell us that certain emotional responses carry different meanings in diferrent cultures. For example, what emotion do you suppose might be conveyed while sticking out your tounge ? For American, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.
8: Young children .

Choose the correct answer to complete the  following passage.

"In a healthy relationship, both partners respect, trust and embrace (1) ____ differences. Both partners are able to communicate (2) ____ their needs and listen to their partner, and work to resolve conflict in a rational and (3) ____ way. But maintaining a healthy relationship (4) ____ for skills many young people are never taught. A lack of these skills, and (5) ____ up in a society that sometimes celebrates violence or in a community that experiences a high (6) ____ of violence, can lead to unhealthy and even violent relationships among youth.

Dating violence (7) ____ psychological or emotional violence, such as controlling behaviours or jealousy; physical violence, such as hitting or punching. More than 20 per cent of all adolescents report having experienced (8) ____ psychological or physical violence from an intimate partner - and underreporting remains a concern.

Adolescents, (9) ____ older adolescents, often have romantic relationships, which are long-term, serious, and intimate. Society has a responsibility to provide young people with the resources, skills, and space (10) ____ to safeguard their physical and emotional well being in these relationships. Youth-serving professionals, educators, and parents can help young people in need access services to (11) ____ dating abuse victimisation. Research also has shown that programmes intended to prevent dating violence can be (12) ____."

2.  Both partners are able to communicate (2) ____ their needs and listen to their partner,

Read the following passage and choose the best answer (A, B, C, D):
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 access 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 work day with uncertainty over the significance of their accomplishments, which over time can contribute to serious problems in mental and physical health  .
 4. The passage states that one solution to time management problems is to .

Read the following passage and choose the best answer (A, B, C, D):
Simply being bilingual doesn’t qualify someone to interpret. Interpreting is not only a mechanical process of converting one sentence in language A into the same sentence in language B. Rather, its a complex art in which thoughts and idioms that have no obvious counterparts from tongue to tongue - or words that have several meanings must be quickly transformed in such a way that the message is clearly and accurately expressed to the listener. At one international conference, an American speaker said, “You can’t make a silk purse out of a sows ear”, which meant nothing to the Spanish audience. The interpretation was, “A monkey in a silk dress is still a monkey” - an idiom the Spanish understood and that expressed the same idea. There are 2 kinds of interpreters, simultaneous and consecutive. The former, sitting in a separated booth, usually at a large multilingual conference, speaks to listeners wearing headphones, interpreting what a foreign language speaker says - actually a sentence behind. Consecutive interpreters are the ones most international negotiations use. They are employed for smaller meetings without sound booths and headphones. Consecutive interpretation also requires two-person teams. A foreign speaker says his piece while the interpreter, using a special shorthand, takes notes and during a pause, tells the client what was said. 
8. Which of the following would a consecutive interpreter be used for?

Read the following passage and choose the best answer (A, B, C, D):
There are many theories about the beginning of drama in ancient Greece. The one most widely accepted today is based on the assumption that drama evolved from ritual. The argument for this view goes as follows. In the beginning, human beings viewed the natural forces of the world, even the seasonal changes, as unpredictable, and they sought, through various means, to control these unknown and feared powers. Those measures which appeared to bring the desired results were then retained and repeated until they hardened into fixed rituals. Eventually stories arose which explained or veiled the mysteries of the rites. As time passed some rituals were abandoned, but the stories, later called myths, persisted and provided material for art and drama. Those who believed that drama evolved out of ritual also argue that those rites contained the seed of theater because music, dance, masks, and costumes were almost always used. Furthermore, a suitable site hard to be provided for the performances, and when the entire community did not participate, a clear division was usually made between the “acting area” and the “auditorium”. In addition, there were performers, and since considerable importance was attached to avoiding mistakes in the enactment of rites, religious leaders usually assumed that task. Wearing masks and costumes, they often impersonated other people, animals, or supernatural beings, and mimed the desired effect- success in hunt or battle, the coming rain, the revival of the Sun as an actor might. Eventually such dramatic representations were separated from religious activities. Another theory traces the theater’s origin from the human interest in storytelling. According to this view, tales (about the hunt, war or other feats) are gradually elaborated, at first through the use of impersonation, action, and dialogue by a narrator and then through the assumption of each of the roles by a different person. A closely related theory traces theater to those dances that are primarily rhythmical and gymnastic or that are imitation of animal movements and sounds.
6: The word "enactment" in paragraph 3 is closest in meaning to .

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23:

Holidays are rich in old traditions and are (19) _______in Scotland, Ireland, Wales and England. Christmas is a great English (20) _______ holiday, and in Scotland it is not kept at all, except by clerks in banks; all the shops, mills and factories are working. But six days later, (21)_______ New Year’s Eve, the Scots begin to enjoy themselves. People invite their friends to their house (22)_______ “sit the old year out and the new year in”. When the clock begins to strike, the head of the family (23)_______to the front door, opens it wide, and holds it until the last stroke. Then he shuts the door. He has let the old year out and the New Year in.

Question 20:....................

Read the passage and choose one correct answer for each question.

     PARENTS’ DREAMS

     Parents often have dreams for their children’s future. They hope their children will have a better life than they had. They dream that their children will do things that they couldn’t do.

Parents who come to the U.S from foreign countries hope their children will have better education here. They think their children will have more career choices and more successful lives. They make many sacrifices so that their children will have more opportunities. They think their children will remain close to them because of this. Some children understand and appreciate these sacrifices and remain close to their parents. However, other children feel ashamed that their parents are so different from other Americans.

The word career in line 4 is closest in meaning to ___

Read the following passage and choose the best answer (A, B, C, D):
The United Nations is an international organization founded in 1945. It is currently made up of 193 member countries. Its main goal is to bring different nations together to promote peace and justice in the world. The UN also works to make the world a safe and secure place. It is important to remember that the UN is not a “world government”. This means that the UN does not make laws for different countries to follow. However, the UN does hold regular votes on global policies and issues. The main branch of the UN is called the “General Assembly”. All members of the United Nations are represented and have their votes. If there is a problem in a certain area of the world or a particular country, the UN will vote on how to best solve the problem. At least two-thirds of all member countries must agree on how to resolve the problem in order for the UN to take action. If less than two-thirds of the voting countries agree, no immediate action is taken. Another branch is the Security Council. Its main purpose is to maintain international peace and keep the world secure. This branch has only fifteen members, five of which are permanent, including China, France, Russia, the United Kingdom, and the United States. The other ten members are elected by the General Assembly for two-year terms. IF the council feels that international peace is being threatened, the fifteen members will try to outline a way to resolve the situation in a peaceful manner. The third important branch is the Economic and Social Council. This branch works to help monitor the world economy and resolve social issues around the world such as violations of human rights, the fight against international crime and destruction of the environment. There are 54 government representatives serving on this council. They are elected by the General Assembly to serve for three-year terms. Council members are elected to represent certain areas of the world. 
7. It can be inferred from the passage that: 

Read the following passage and choose the best answer (A, B, C, D):
At first glance, there is little in Horton to attract people. The other nearby towns have much more to offer: Bradfield has its river and historic buildings, while Newtown has shops and entertainment. The buildings of Horton look dirty and unloved. For shops, there is a small supermarket, a few bargain shops, a bakery which, strangely, does not sell bread and a florist which has one stand of sad-looking flowers. Even so, Horton has several advantages over its neighbouring towns. Firstly, it has a country park. Four thousand years ago, this was an important fort. There are no historic remains here now, but there are wonderful views over the countryside. On sunny weekends you can often see kids out with their parents, kicking balls or flying kites. There aren’t many job opportunities in Horton, and the roads to nearby cities aren’t really fast, but there are excellent rail links. You can be in London in an hour and a half, and other cities are less than an hour away. That means that parents can earn a good salary and still get home in time to spend the evenings with their families. Houses in Horton aren’t pretty, but they are functional and cheap. The streets are  quiet and safe, and there are plenty of parks and playgrounds. It has a library, three primary schools and a secondary school, St. Mark’s. It’s not as academically brilliant as other schools in the area, but it is friendly and offers a wide range of subjects and activities to children of all abilities and backgrounds. The town also has a swimming and a sports centre, and the community halls hold regular clubs and events for people of all ages.
1. What is the writer’s main purpose?

Read the following passage and choose the best answer (A, B, C, D):
Simply being bilingual doesn’t qualify someone to interpret. Interpreting is not only a mechanical process of converting one sentence in language A into the same sentence in language B. Rather, its a complex art in which thoughts and idioms that have no obvious counterparts from tongue to tongue - or words that have several meanings must be quickly transformed in such a way that the message is clearly and accurately expressed to the listener. At one international conference, an American speaker said, “You can’t make a silk purse out of a sows ear”, which meant nothing to the Spanish audience. The interpretation was, “A monkey in a silk dress is still a monkey” - an idiom the Spanish understood and that expressed the same idea. There are 2 kinds of interpreters, simultaneous and consecutive. The former, sitting in a separated booth, usually at a large multilingual conference, speaks to listeners wearing headphones, interpreting what a foreign language speaker says - actually a sentence behind. Consecutive interpreters are the ones most international negotiations use. They are employed for smaller meetings without sound booths and headphones. Consecutive interpretation also requires two-person teams. A foreign speaker says his piece while the interpreter, using a special shorthand, takes notes and during a pause, tells the client what was said. 
6. The author implies that most people have the opinion that the skill of interpreting is : 

Choose the best anwers for the following questions.

The generation gap, which refers to a broad difference between one generation and another, especially between young people and their parents, usually leads to numerous conflicts. Such family conflicts can seriously threaten the relationship between parents and children at times.
 
It goes without saying that, however old their children are, parents still regard them as small kids and keep in mind that their offspring are too young to protect themselves cautiously or have wise choices. Therefore, they tend to make a great attempt to help their children to discover the outside world. Nevertheless, they forget that as children grow up, they want to be more independent and develop their own identity by creating their own opinions, thoughts, styles and values about life.

One common issue that drives conflicts is the clothes of teenagers. While teens are keen on wearing fashionable clothes which try to catch up with the youth trends, parents who value traditional clothes believe that those kinds of attire violate the rules and the norms of the society. It becomes worse when the expensive brand name clothes teens choose seem to be beyond the financial capacity of parents.

Another reason contributing to conflicts is the interest in choosing a career path or education between parents and teenagers. Young people are told that they have the world at their feet and that dazzling future opportunities are just waiting for them to seize. However, their parents try to impose their choices of university or career on them regardless of their children's preference.

Indeed, conflicts between parents and children are the everlasting family phenomena. It seems that the best way to solve the matter is open communication to create mutual trust and understanding.
 

Why do teenagers want to choose their university or career?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

   It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school. The distinction between schooling and education implied by this remark is important.

   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.

   Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schooling.

The word “bounds” in line 5 is closest in meaning to......................

Read the following passage and choose the best answer (A, B, C, D):
Fiberscopes are one of the most are one of the most important outcomes of he science of fiber optics. Fibers made of glass and transparent acrylic plastic are capable of conveying light energy, and when thousands of these fibers are combined in what is called a fiberscope, they can transmit images. The most common fiberscopes contain about 750,000 fibers, each 0.001 centimeter, or 10 microns, in diameter. For certain uses, the diameter of the fiber may be as small as 5 microns. Fiberscopes have a wide range of applications. In the medical field, physicians use fiberscopes to examine internal organs and as an aid in delicate surgeries. Miniature probes have also been developed to view muscle fiber, skin tissue, and blood cells. Fiberscopes have also found varied uses in industry, particularly to inspect or control operations in inaccessible areas. Bundles of fiberscopes fused together in a solid plate, called a faceplate, are being used in the manufacture of television tubes and other cathode- ray tube devices. The most far reaching applications of fiber-optic technology are in communication. Optical fibers carry voice messages for telephone service. The sound of the voice is electronically broken down into thousands of pulses per second, which causes a transmitting laser to send coordinated pulses of light through the optical fibers. At the receiving end, the light pulses are converted to electrical signals and the voice message is reconstructed. Light-wave communication systems can handle an immensely greater number of telephone calls and television programs than the current system, and they will form the basis of the “electronic superhighway” expected to crisscross the nation in the near future of the information age.
1. How do optical fibers carry voice message?

Children all around the world love to read comic books. Maybe they like to read the kind of comic books that come out once a month, like Spiderman or Batman, or maybe they like manga-style comic books. That means that publishers who make comic books need to keep in touch with the things young people like to do. One thing that many young people today are interested in is technology, so of course kids want to read digital comic books on electronic devices.

Let's take Japanese manga as an example. There are lots of people around the world who enjoy reading manga. However, in the past, it was difficult to find translated versions of manga in comic bookstores. But that did not stop manga fans. Some fans who could translate Japanese into their own language started translating manga themselves. Then they scanned the pages of manga books and uploaded the scanned pages to the Internet with their translation. This practice has become so popular. People in the comic book industry made up a name for it. By combining the words scan and translation, they call it "scanlation", and it is a big problem today. The people who do scanlation usually share their manga for free, so readers do not buy manga books. Writers, artists, and publishers all end up losing money because of scanlation. Another problem is piracy in the comic book industry. Illegal copies of old and brand new comics alike have been hurting comic book sales.

Despite the progress made in converting comics to digital formats, hardcopy comic books are still by far the most popular format among fans. In the meantime, comic book publishers and stores will just have to keep an eye on their buyers' habits. As the popularity of digital books for e-readers and tablets grows, the popularity of digital comic books will grow as well.

According to paragraph 2, the practice of "scanlation" mostly involves ______.

Certain birds are, more often than not, considered bad luck, or even a sign of impending death. For example, all over the world, both crows and ravens have some connection to war, and death. In early times, crows and ravens were thought to accompany the gods of war, or be signs of the gods’ approaching arrival. This idea later changed. Crows in particular were thought to be harbingers of ill fortune or, in some cases, guides to the afterlife. Woe be it to the person who saw a single crow or raven flying overhead, for this was most certainly a portent of death in the near future.
 Interestingly, though potentially bad luck for people individually, the raven is considered to be good luck for the crown of England. So much so, in fact, that a “raven master” is, even today, an actual government position in London. He takes care of the ravens there and also clips their wings, ensuring that these birds can never fly far from the seat of the British government. This way, the kingdom will never fall to ill fortune.
 Another bird that is thought to play a part in forecasting the fortunes of people is the swallow. Depending on how and when it is seen, the swallow can be a harbinger of either good or ill fortune. Perhaps inspired by the swallow’s red-brown breast, Christian people initially related the swallow to the death of Jesus Christ. Thus, people who saw a swallow fly through their house considered it a portent of death. Later, however, farmers began to consider swallows signs of good fortune. Any barn that has swallows living in it is sure to be blessed in the following year. Farmers also have to beware of killing a swallow; that would be certain to end any good luck they might have had.
 Though many people think these superstitions are old wives’ tales, there is actually some evidence to support them. For example, crows and ravens, being scavengers, appear at the aftermath of battles. Thus, large numbers of crows and ravens could be good indications of war in an area. As well, swallows feed on insects that can cause infections in cattle. Thus, a farmer who has many swallows in his barn may actually have healthier animals on his farm. Therefore, the next time you feel inclined to laugh at an old wives’ tale, maybe you had better find out if there is any truth to it first!.

The word "portent" in the first paragraph is closest in meaning to ___________.

Read the following passage and choose the best answer (A, B, C, D):
Music can bring US to tears or to our feet, drive US into battle or lull US to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that every reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system - an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For  example, the fact that whale and human music have so much in common even though our evolutionary paths have not interested for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene. Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers - and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazingly, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes - singing the new whales'songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.
1: Why did the author write the passage?