Read the passage below carefully, and then choose the best answer:
Clean and Popular
Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin. When the windmills spin, they make electricity. Then we can use the electricity. Many people think that wind power is new, but that is not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity. Wind power is a very popular source of energy. Most people think that should use it more and more. First of all, it is clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. In addition, wind power is cheap, and it is getting even cheaper. A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. That used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds. However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for some people, because windmills are often in very pretty areas. Besides, wind doesn’t blow all the time, so we can’t use wind power all year round. Finally, windmills are noisy. Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.
5. Why can’t we use wind power all the time?

Read the passage below carefully, and then choose the best answer:
Clean and Popular
Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin. When the windmills spin, they make electricity. Then we can use the electricity. Many people think that wind power is new, but that is not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity. Wind power is a very popular source of energy. Most people think that should use it more and more. First of all, it is clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. In addition, wind power is cheap, and it is getting even cheaper. A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. That used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds. However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for some people, because windmills are often in very pretty areas. Besides, wind doesn’t blow all the time, so we can’t use wind power all year round. Finally, windmills are noisy. Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.
7. What does the passage say about wind power?

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 from 36-42
From smartphones and tablets to apps and social media, society is ambushed from all sides with technology. Naturally, all generations embrace it differently, with younger “digital natives” generally being more connected, more switched-on and more tech literate than older age groups.
According to Pew Research, 92% of Millennials (born 1981–1996) own smartphones, compared with 85% of Gen Xers (born 1965–1980) and 67% of Baby Boomers (born 1946–1964). In terms of tech behavior, older generations tend to use their phones mostly for making calls, whereas for younger generations, a phone is their digital window to the world. Phones are used for social media, going online, texting, emailing, playing games, listening to music, and recording and watching videos.
The daily media consumption of different generations also vastly differs. Gen Z and Millennials favor streaming and online services, with 46% of teens saying they use Netflix compared to 31% of those aged over 16. Furthermore, 16-24s spend 30% of their downtime watching TV or video, compared to 40% of time spent on these activities by the average UK adult. Boomers spend a whopping 344 minutes a day watching regular TV, significantly more than any other age group.
Size also matters more depending on your decade of birth. Younger generations prefer smaller screens sizes, opting for a smartphone as their go-to tech, while Generation X and technology newbies - the Boomers, are going bigger, owning more desktops and tablets. Always in the front of the queue for the hottest tech, younger generations see technology as an integral part of their existence, and since few Millennials and Gen Z can remember a time without social media, they’re more fearless and carefree when it comes to technology. So much so, that a LivePerson report revealed 65% of Millennials and Gen Z interact more with each other online than they do in the real world.
Fundamentally, these behaviors and preferred technologies combine to create a technological generation gap, where employees, shaped by their personal experiences, demonstrate different levels of ability and willingness to adopt new tech. Constantly chasing the next update or device, switched on Millennials and Gen Z are quick to lap up the latest apps, games, and platforms, while Gen X and Boomers are generally slower to embrace technology - both at home and in the workplace.

 According to paragraph 4, which statement is correct about different generations and their gap?

The Internet has truly transformed how students do their homework. (1)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (2)______ to the Internet to download enormous amounts of data available online. In the past, students were limited to their school’s (3)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to (4)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (5)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!

(60)_______

Read the following passage and choose the best answer (A, B, C, D):
Glenbrook South (GBS) High School is in a suburb of Chicago, lllinois, in the United States. It is an award-winning school with a highly competent teaching staff. It has over 400 Asian Pacific American students-over 17 percent of the students in the school. Of these, the majority are Korean American. This is very unusual in a state where Korean Americans are less than 1 percent of the population. The interactions of the Korean American students at GBS were the subject of an article in Asian Week magazine. Different Korean American students react differently to being in a high school where most students are white. Professor Pyong Gap Min, an expert on Korean life in America, believes that Korean Americans in this situation can sometimes feel inhibited or ashamed of their Korean identity. Asian Week interviewed a number of GBS students, and each had a different attitude. Eighteen-year-old Alice said that she used to spend time only with Korean American friends. Although she felt secure with those friends, she found herself motivated to form closer relationships with non-Koreans, too. She said that she felt she was missing out on new experiences and challenges. Seventeen-year-old John moved in the opposite direction. In junior high school, most of John's friends were white. After coming to GBS, his sense of his Korean American identity was restored, and he decided to have mainly Korean American friends. He feels that he and his Korean American friends understand each other better. For example, they understand about severe parental pressures to succeed at school; John felt his white friends couldn't really understand. Sixteen-year-old Paul has some Korean American friends, but he says he spends most of his time with his white friends. He is often the only Asian American in the group, but he doesn't mind. What Paul likes about the white culture is that he can be more radical - he can be as loud and funny as he wants to be. He says he doesn't see as much of that among the Asian students. Without belittling the importance of what these students had to say, it's important to remember that their opinions at this phase of their lives are bound to change as they grow into adulthood. But these honest opinions can help US better understand issues of cultural relations, and their honesty might help Americans from different cultural groups to get along better in the future. 
3. The phrase "agent of education" in paragraph 2 can be replaced by:

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:
At 7pm on a dark, cold November evening, thousands of people are making their way across a vast car park. They’re not here to see a film, or the ballet, or even the circus. They are all here for what is, bizarrely, a global phenomenon: they are here to see Holiday on Ice. Given that most people don’t seem to be acquainted with anyone who’s ever been, the show’s statistics are extraordinary: nearly 300 million people have seen Holiday on Ice since it began in 1943; it is the most popular live entertainment in the world.
But what does the production involve? And why are so many people prepared to spend their lives travelling round Europe in caravans in order to appear in it? It can't be glamorous, and it's undoubtedly hard work. The backstage atmosphere is an odd mix of gym class and workplace. A curtained-off section at the back of the arena is laughably referred to as the girls' dressing room, but is more accurately described as a corridor, with beige, cracked walls and cheap temporary tables set up along the length of it. Each girl has a small area littered with pots of orange make-up, tubes of mascara and long false eyelashes.
As a place to work, it must rank pretty low down the scale: the area round the ice-rink is grey and mucky with rows of dirty blue and brown plastic seating and red carpet tiles. It's an unimpressive picture, but the show itself is an unquestionably vast, polished global enterprise: the lights come from a firm in Texas, the people who make the audio system are in California, but Montreal supplies the smoke effects; former British Olympic skater Robin Cousins is now creative director for the company and conducts a vast master class to make sure they're ready for the show's next performance.
The next day, as the music blares out from the sound system, the cast start to go through their routines under Cousins’ direction. Cousins says, The aim is to make sure they're all still getting to exactly the right place on the ice at the right time - largely because the banks of lights in the ceiling are set to those places, and if the skaters are all half a metre out they'll be illuminating empty ice. Our challenge, ‘he continues, ‘is to produce something they can sell in a number of countries at the same time. My theory is that you take those things that people want to see and you give it to them, but not in the way they expect to see it. You try to twist it. And you have to find music that is challenging to the skaters, because they have to do it every night.’
It may be a job which he took to pay the rent, but you can't doubt his enthusiasm. “The only place you'll see certain skating moves is an ice show,” he says, “because you're not allowed to do them in competition. It's not in the rules. So the ice show world has things to offer which the competitive world just doesn't.” Cousin knows what he's talking about because he skated for the show himself when he stopped competing - he was financially unable to retire. He learnt the hard way that you can't put on an Olympic performance every night. “I'd be thinking, these people have paid their money, now do your stuff, and I suddenly thought”, “I really can't cope. I'm not enjoying it”. The solution, he realised, was to give 75 per cent every night, rather than striving for the sort of twice-a-year excellence which won him medals.
To be honest, for those of us whose only experience of ice-skating is watching top-class Olympic skaters, some of the movements can look a bit amateurish, but then, who are we to judge? Equally, it's impossible not to be swept up in the whole thing; well, you'd have to try pretty hard not to enjoy it.

According to paragraph 1 the writer is surprised to see that although Holiday on Ice is popular     .

Choose the best answer:
“Would you bother if I had a look at your paper?” - “……………”

Choose the best answer:
Katherine_____ at Bob's house every night this week.

Choose the best answer:
He will take the dog out for a walk as soon as he ............dinner.

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 :
Do you quickly pull up any piece of information you need by looking (1)___________ on the Internet? If you do, you might be unfortunately making yourself less intelligent. Instead of having to understand basic bits of information, you have come to (2)___________ on the Internet for all of the things that you want to know. While this may be an easy solution and great convenience to some problems in everyday life, it can never be a solution when a person finds himself or herself in a situation where there is no (3)__________ to the Internet. In the past, one thing that was considered a very important part of (4)__________ either in a car or on foot was the ability to read a map. Today, people instead pull up maps on their smartphones and, using the GPS technology that the phones offer, instantly know where they are on the map. Then, they can simply (5)__________ where they want to go, and they will be instructed how to get there. They can do this in a city, and they can also often do this when they go off onto trails in forests.

Read the passage below carefully, and then choose the best answer:
Movies for the Blind
When you think of the cinema, the phrase ‘watching a movie’ probably comes to mind, and, indeed, moviemakers work very hard to make their films interesting visually. They may use elaborate costumes, beautiful locations, or amazing special effects to tell a story. An actor’s expression or movements can also sometimes say more than words. But what about people who are blind or have trouble seeing? Movies also I contain dialogue, music, and sound effects – things that people don’t need to see in order to enjoy. Movie reviewer Marty Klein, who is blind, created a website called Blindspots to help people choose movies that they can follow without the help of someone explaining what is happening on the screen. He gave a rating, from 1 to 10, based on several things. A movie received a high rating if it has only a few main characters whose voices are easy to recognize. Klein also liked interesting stories without many changes in time and place. A large amount of dialogue between the characters was better than long silences or noisy action scenes. His reviews are still online, but the site is no longer updated. Another blind movie reviewer, Jay Forry, maintains the website Blindsite Reviews. He also writes for newspapers and is a guest on radio shows. Forry gives movies one of five ratings, including, “So good, blind people like it” and “I’m glad I couldn’t see it.” Forry became a writer after going blind at the age of 28, and his writing skills and sense of humour are what keep people reading his reviews or listening to him on the radio. After “watching” the animated movie Up, Forry commented that he wished he, too, could have a talking dog to tell him to watch out for cars and not to “go into the ladies’ restroom again.” Sometimes, though, it’s nice to go to the movie without reading reviews and knowing what to expect. Some movie theaters have begun to offer recorded audio descriptions of the movements, scenery, and special effects so that blind moviegoers can follow what other audience members see on the screen. They usually receive a wireless headset to wear during the movie. This allows them to listen to the narration while still hearing the hearing’s music and other sounds that surround them in the theater. Jay Forry also notes that modern theaters now have excellent sound systems, something he appreciates more than the average moviegoer. In the end, going to the movies should be a fun and exciting experience – for both the sighted and the blind.
4. What is Jay Forry most likely to say about a movie he dislikes?

Choose the best answer:
We stayed friends even after we ________ and left home.

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:
Overpopulation, the situation of having large numbers of people with too few resources and too little space, is closely associated with poverty. It can result from high population density, or from low amounts of resources, or from both. Excessively high population densities put stress on available resources. Only a certain number of people can be supported on a given area of land, and that number depends on how much food and other resources the land can provide. In countries where people live primarily by means of simple farming, gardening, herding, hunting, and gathering, even large areas of land can support only small numbers of people because these labor-intensive subsistence activities produce only small amounts of food.
In developed countries such as the United States, Japan, and the countries of Western Europe, overpopulation generally is not considered a major caus of poverty. These countries produce large quantities of food through mechanized farming, which depends on commercial fertilizers, large-scale irrigation, and agricultural machinery. This form of production provides enough food to support the high densities of people in metropolitan areas.
A country’s level of poverty can depend greatly on its mix of population density and agricultural productivity. Bangladesh, for example, has one of the world’s highest population densities, with 1, 147 persons per sq km. A large majority of the people of Bangladesh engage in low – productivity manual farming, which contributes to the country’s extremely high level of poverty. Some of the smalleer countries in Western Europe, such as the Netherlands and Belgium, have high population densities as well. These countries practice mechanized farming and are involved in high-tech industries, however, and there fore have high standards of living.
At the other end of the spectrum, many countries in sub-Saharan Africa have population densities of less than 30 persons per sq km. Many people in these countries practice manual subsistence farming; these countries also have infertile land, and lack the economic resources and technology to boost productivity. As a consequence, these nations are very poor. The United States has both relatively low population density and high agricultural productivity; it is one of the world’s wealthiest nations.
High birth rates contribute to overpopulation in many developing countries. Children are assets to many poor families because they provide labor, usually for farming. Cultural norms in traditionally rural societies commonly sanction the value of large families. Also, the governments of developing countries often provide little or no support, financial or political, for family planning; even people who wish to keep their families small have difficulty doing so. For all these reasons, developing countries tend to have high rates of population growth.
(From “Poverty” by Thomas J. Corbett)

Which of the following could be the best title for the passage?

Rewrite the sentence
I close friend gave me a wonderful present on my birthday.

Read the following passage and choose the best answer (A, B, C, D):
Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like. What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important. The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem. Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two. Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.
3. The word “which” in paragraph 3 refers to

Read the passage below carefully, and then choose the best answer:
The Invention of the Periodic Table
If you are looking to gain a better understanding of the world around you, chemistry is the perfect subject to study. It is an examination of matter, its properties, and its interactions with everything around it. Where physics often deals with concepts and theories that are difficult to test and observe, chemistry principles can easily be applied to medicine, cooking, and several other areas. At the heart of all these discoveries is one vital chart that organizes elements based on their atomic number and chemical properties: the periodic table. Although the first periodic table was published in 1869, it was a work in progress for hundreds, if not thousands of years. Since ancient times, people have been fascinated with elements such as gold, tin, and copper in their natural forms. They were mined and used to make jewellery, weapons, coins, and many other things. Over time, people became more curious about these metals and how they were composed. In ancient Greece, Aristotle and other philosophers claimed things were made from the elements of earth, water, fire, and air. For years, this theory was accepted. Then people began to reevaluate this concept during the Age of Enlightenment. In 1661, Irish scientist Robert Boyle defined an element as something that “cannot be broken down into a simpler substance by a chemical reaction”. Over a century later, French chemist Antoine-Laurent Lavoisier would publish the first modern textbook on chemistry. In it, he listed several substances which he believed should be classified as elements into two categories: metals, and non-metals. Although his work wasn’t completely accurate, it represented a major step forward at the time. Over the next century, scientists started to classify the elements into different groups depending on their properties and atomic weights. However, it is Russian chemist Dmitri Mendeleev who is usually credited as the first person to make a periodic table. Although other scientists had submitted tables, they were eventually rejected by the scientific community for a lack of detail. Mendeleev arranged all of the elements according to their atomic mass. He was even smart enough to leave empty spaces for elements which hadn’t been discovered at the time. Although Mendeleev’s periodic table wasn’t perfect, it set the format which is similar to the one used today.
1. What is the passage mainly about?

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:
Most of the time, we avoid strangers. It is one of the first lessons we learn (1)__________  children. But according to Dr. Richard Wiseman, it is a habit we should change. Talking to strangers opens up new possibilities in life. It increases the chances of finding luck and friendship. Choosing which strangers to talk to obviously requires a bit of common (2)___________ and judgement, but Liz Barry and Bill Wetzel from New York were so inspired by the idea that they started the “Talk to Me” project. For three years, they sat at bus stops, on street corners and any other place they could find in New York holding a sign saying ‘Talk to me’. They encountered hostility and (3)__________ sometimes, but in general they were surprised by the kindness they encountered. Many philosophical and religious traditions tell us that happiness can be found by living in the present. Now there is some scientific support (4)___________ this belief. Recent research by Harvard University psychologists found that we spend 46.9 percent of our (5)____________ time daydreaming. And when we daydream, we are less happy, the research found.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Following up its successful Sushi Workshop in July, the Japan-America Society of Greater Long Island presents sushi chef Maksui from Kenichi for an advanced sushi workshop on Sunday, October 25th at the Tri-fold Clubhouse (410 Guadalupe St.) from 1:30 p.m. to 3:30 p.m. This workshop will allow attendees of the previous workshop to build on their sushi-making skills. This is not a free event. The cost for current JGA members is $35. If you’re a nonmember, the cost is $40 (Please bring exact change in cash). Although the cost includes all the ingredients necessary to make sushi, you will need to bring your own knife and a towel or cloth of some sort. Please note that registration is required in order to attend this class. Space is limited. Send a registration request to jga-events@jga.org by Thursday, October 22. 48 hour’s notice is required in order to cancel.
2. What information is NOT given in the notice?

Read the following passage and choose the best answer (A, B, C, D):
The principal difference between urban growth in Europe and in the North American colonies was the slow evolution of cities in the former and their rapid growth in the latter. In Europe they grew over a period of centuries from town economies to their present urban structure. In North America, they started as wilderness communities and developed to mature urbanism in little more than a century. In the early colonial days in North America, small cities sprang up along the Atlantic Coastline, mostly in what are now New England and the Middle Atlantic states in the United States and in the lower Saint Lawrence valley in Canada. This was natural because these areas were nearest England and France, particularly England, from which most capital goods were imported. Merchandising establishments were, accordingly, advantageously located in port cities from which goods could be readily distributed to interior settlements. Here, too, were the favored locations for processing raw materials prior to export. Boston, Philadelphia, New York, Montreal, and other cities flurished, and as the colonies grew, these cities increased in importance. This was less true in the colonial South, where life centered around large farms, known as plantations, rather than around towns, as was the case in the areas further north along the Atlantic coastline. The local isolation and the economic self-sufticiency of the plantations were antagonistic to the development of the towns. The plantations maintained their independence because they were located on navigable streams and each had a wharf accessible to the small shipping of that day. In fact, one of the strongest factors in the selection of plantation land was the desire to have it front on a water highway. When the United States became an independent nation in 1776, it did not have a single city as large as 50,000 inhabitants, but by 1820 it had a city of more than 100,000 people, and by 1880 it had recorded a city of over one million. It was not until after 1823, after the mechanization of the spinning and weaving industries, that cities started drawing young people away from farms. Such migration was particularly rapid following the Civil War (1861 -1865)
5. According to the passage, early colonial cities were established along the Atlantic coastline of North America due to: 

Read the following passage and choose the best answer (A, B, C, D):
Television has transformed politics in the United States by changing the way in which information is disseminated, by altering political campaigns, and by changing citizen's patterns of response to politics. By giving citizens independent access to the candidates, television diminished the role of the political party in the selection of the major party candidates. By centering politics on the person of the candidates, television accelerated the citizen's focus on character rather than issues. Television has altered the forms of political communication as well. The messages on which most of US reply are briefer than they once were. The stump speech, a political speech given by travelling politicians and lasting 1/2 to 2 hours, which characterized nineteenth-century political discourse, has given way to the 30-second advertisement and the 10 second "sound bite" in broadcast news. Increasingly the audience for speeches is not that standing in front of the politician but rather the viewing audience tvho will hear and see a snippet of the speech on the news. In these abbreviated forms, much of what constituted the traditional political discourse of earlier ages has been lost. In 15 or 30 seconds, a peaker cannot establish the historical context that shaped the issue in question, cannot detail the probable causes of the problem, and cannot examine alternative proposals to argue that one is preferable to others. In snippets, politicians assert but do not argue. Because television is an intimate medium, speaking through it require a changed political style that was more conversational, personal, and visual than that of the old-style stump speech. Reliance on television means that increasingly our political world contains memorable pictures rather than memorable words. Schools teach US to analyze words and print. However, in a word in which politics is increasingly visual, informed citizenship requires a new set of skills. Recognizing the power of television's pictures, politicians craft televisual, staged events, called pseudo-event, designed to attract media coverage. Much of the political activity we see on television news has been crafted by politicians, their speechwriters, and their public relations advisers for televised consumption. Sound bites in news and answers to questions in debates increasingly sound like advertisements.
8. According to the passage, as compared with televised speeches, traditional political discourse was more successful at: 

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:
Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was severely limited. Because undersea pressure affects their speech organs, communication among divers has always been difficult or impossible. But today, most oceanographers avoid the use of vulnerable human divers, preferring to reduce the risk to human life and make direct observations by means of instruments that are lowered into the ocean, from samples take from the water, or from photographs made by orbiting satellites. Direct observations of the ocean floor can be made not only by divers but also by deep-diving submarines in the water and even by the technology of sophisticated aerial photography from vantage points above the surface of more than seven miles and cruise at depths of fifteen thousand feet. In addition, radio-equipped buoys can be operated by remote control in order to transmit information back to land-based laboratories via satellite. Particularly important for ocean study are data about water temperature, currents, and weather. Satellite photographs can show the distribution of sea ice, oil slicks, and cloud formations over the ocean. Maps created from satellite pictures can represent the temperature and the color of the ocean's surface, enabling researchers to study the ocean currents from laboratories on dry land. Furthermore, computers help oceanographers to collect, organize, and analyze data from submarines and satellites. By creating a model of the ocean's movement and characteristics, scientists can predict the patterns and possible effects of the ocean on the environment.
Recently, many oceanographers have been relying more on satellites and computers than on research ships or even submarine vehicles because they can supply a greater range of information more quickly and more effectively. Some of humankind's most serious problems, especially those concerning energy and food, may be solved with the help of observations made possible by this new technology.

Which of the following are NOT shown in satellite photographs?