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In July of 1975, the first US-Soviet joint ……… occurred with the Apollo-Soyuz project.

 

The ability to conduct electricity is one of the key properties of a metal. Other solid material such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what are known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the 'lead' of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.

Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor or electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

The word "outermost” in paragraph 1 mostly means________.

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Space Tourism
If you are like most people, you probably dream of spending your next vacation sightseeing or relaxing in a tropical spot. But pretty soon, you may have the option of blasting into space and exploring the universe. It appears that space tourism may start to experience a boom that is sure to be out of this world. Since ancient times, humans have surely dreamed about visiting space. However, it was just a fantasy until 1961, when Soviet cosmonaut Yuri Gagarin became the first person to fly into space. Yet in the years following, only a few highly-trained Soviet and American astronauts managed to leave the Earth’s atmosphere. In the mid-1980s, the US began to relax some of its restrictions. In 1986, an engineer named Charles Walker became the first non-government employee to fly into space. A year later, an American teacher named Christa McAuliffe was chosen to be the first teacher in space. Unfortunately, the Space Shuttle she was on, The Challenger, crashed during takeoff, killing everyone on board. Space tourism got an unexpected boost from the collapse of the Soviet Union. With Russia’s space programme in dire need of money, it became open to offers for space tourism. In 1990, a Japanese reporter was allowed to fly with a Russian crew into space, but the trip would cost his employer $28 million. In the late 1990s, a private company, MirCorp, started organizing trips to space for wealthy individuals. Now, many other companies are trying to do the same. Still, most people who want to become space tourists face a major barrier: the price. Early space tourists have paid dozens of millions of dollars for a seven-to- ten-day stay outside the Earth. However, there are some indications that the price will come down in the near future. Some corporations are gearing up for this with big plans to make space a more hospitable place. The luxurious hotel chain Hilton has expressed interest in opening a space hotel in the next 15 to 20 years. Meanwhile, some experts believe that flights to and from the moon could become a common occurrence within a few decades. Hopefully someday soon we will all have the chance to get to know our solar system a little bit better.
5. What is MirCorp?

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We check the schedule ____________ we want to see the time of the game show.

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

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British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year

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Learning to Dig Jazz Music
It has been said that jazz is America’s greatest contribution to music. It mixes the powerful rhythm of African traditions with elements of European classical music. The beginnings of jazz music are a bit unclear, but many people believe it originated in New Orleans during the late 1800s. New Orleans was a melting pot where local tribes mixed with immigrants who came from Africa and Europe to form a new, unique culture. Jazz has several elements which set it apart from other styles of music. Compared to rock music, jazz is more complex and versatile. Whereas rock bands typically consists of a drummer, some guitarists, and a singer, jazz bands can be big or small and they are made up from a wide variety of instruments. Another thing which sets jazz apart from other forms of music is improvisation. Musicians start with a basic structure, perhaps a few chords, and then they decide what to play in the moment. Therefore, even if the same songs are repeated, you can be certain that no two jazz concerts are the same. Over the years, many sub-genres of jazz came about. Ragtime is one of the first styles that came about, and it consists mainly of upbeat piano compositions. Dixieland Jazz started in the 1920s and it incorporated blue music and brass bands. Next came the Big Band era, which showcased groups with 10 or more musicians playing different instruments. In the Bebop era of the 1940s, jazz musicians returned to smaller groups of four to six musicians, but they started playing far more complex melodies.  If you are just becoming interested in jazz, you should start by listening to the works of some of its masters. Louis Armstrong is considered one of the grandfathers of jazz, as he helped to spread jazz to the masses in the 1920s. Armstrong is perhaps best-known today for singing the classic song “What a Wonderful World”, but in his prime, he was a talented bandleader and an incredible trumpet player. Charlie Parker was all the rage during the bebop age, as every saxophone player was trying to imitate him. Miles Davis is another pioneering jazzman who everyone should check out, as he was always changing his style. During his long career, Davis won nine Grammy awards. Although jazz music is an acquired taste, once you begin to appreciate it, it is like a fine wine that gets better with age.
7. How does the author seem to feel about jazz?

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The Great Energy Debate
Modern civilization is heavily dependent on energy. Without reliable power sources, we couldn’t operate machines, use transportation, communicate via Internet, or do many other things. Although everyone recognizes the importance of energy, deciding what kind of energy the world should use in the future is not a simple task. The two leading candidates for this role are green energy and nuclear energy. Currently, most of the energy we use is derived from fossil fuels. Although this energy source has got us this far, there are several problems with it. For starters, it is a finite resource which is quickly running out. Some analysts have even estimated that the Earth could run out of coal and oil within the next 50 years. Burning fossil fuels also creates large amount of pollution, which is harmful to the environment. Although fossil fuels still provide the majority of our power, governments are seeking better energy sources to use going forward. Green energy is one option that is becoming increasingly attractive. It includes technologies such as solar, wind, and hydro power. These are seen as clean sources of energy because they cause very little pollution. In addition, they are completely renewable, so there is no danger that it will run out. The major disadvantage with green energy sources is that they are not cheap. The other alternative is nuclear power. Like green energy, it is also a renewable source of power that will not run out, and it also doesn’t produce air pollution. In addition, nuclear power is more reliable than green energy, as it doesn’t depend on sunshine, rain, or wind to operate. The major issues with nuclear power are safety concerns and nuclear waste. Nuclear power plants create a considerable amount of nuclear waste which is extremely hazardous to people’s health. If they happen to have a meltdown, this could destroy the surrounding area for years to come. The recent nuclear disaster in Fukushima, Japan brought this reality into the spotlight once again. In response, Germany announced it would close down eight of its nuclear plants immediately, and close the rest by 2022. Meanwhile, other nations refuse to give up on nuclear power, stating that these disasters are rare. The debate of whether to use green or nuclear power will likely continue for some time. In the end, it is quite possible that both energy sources will be used to fuel our planet.
6. What does the author think is the most likely energy solution for the future?

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.
Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

What does this passage mainly discuss?

Rewrite sentences without changing the meaning
 “I am sorry but I won’t do the extra work,” Carol said.

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Thanh Giong Festival/ commemorate/ Saint Giong/, an imaginary/ hero/ the/ Vietnamese.

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

"In the home a dad is very important. He is the (1)……who provides us with money to feed and (2)….. ourselves. He can decorate your bedroom, mend your radio, make (3)….. for your pets, repair a puncture your bicycle tyre and help you with maths homework. A dad can be very useful for (4)…. you in the car to and from parties, music and dancing lessons.
 A dad is the person whom you ask for (5)…. money. He is the one who (6)…. about the time you spend talking on the phone, as he has to pay for the bills. Dad is someone who will support you in an (7)…. , if he believes you to be right. He is someone who reads your school (8) …. And treats if it is good. A dad likes to come into a nice happy home evening, and settle (9)…. in his chair with a newspaper. He likes to (10) ….  his National Service days."

7. Dad is someone who will support you in an (7)…. , if he believes you to be right.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
With the expansion of the Wellness Recreation Center, projected to open Fall 2011, the Recreational Sports Department will be able to build on our current tradition of offering students a wide ….(1)…..of healthy activities at all ability levels. ……(2)…,of the many activities we currently offer, the City of Laredo and TAMIU community are planning to participate in an array of youth activities beginning Summer 2010. These 2-to 3-week-long activities promote health and wellness while providing fun and safe activities to the youth of Laredo and TAMIU. Activities would include softball, soccer, basketball, and other recreational events. If you are interested in …(3)…your son/daughter or our youth camp, please contact us at 326-3015 for more information

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This road is ....... than that road.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
A long time ago, this part of the town used to be a place where people came to relax and get away from their stress. Although this was ….(1)... a shelter for people to escape, it has now become a chaotic and noisy market area. Up until a few years ago, it wasn't as bad as it is now. Although it is true that some people in the neighborhood supported the expansion of the market a few years ago, now most of them….(2)… that it has gotten out of control and created many serious problems for the area. .…(3)…., it might have already gotten too far out of control. What we really need right now is not a mere intervention by civilians but strong action from the mayor's office

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There/ will/ a lot of/ interesting/ activities/ do/ this program.

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At break time, I go to the library and …………. books.

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Helpful Home Remedies
When something is bothering us, it is natural to try and make it go away. We might head to the doctor or make a trip to the local pharmacy for medicine. Unfortunately, these methods can be time-consuming and expensive. But have no fear, because you might be able to whip up an effective home remedy with nothing more than a few simple ingredients from your cupboard. At one time or another, it seems everyone comes down with flu. Our temperature will rise, we may feel nauseous, and we will likely have a stuffy nose and a cough. Aside from taking it easy and getting plenty of rest, you can turn to chicken soup to make you feel better. Mothers from around the world have been making it for thousands of years for sick relatives. The hot soup warms you up and its flavorful smell helps to clear up your nose. It is often prepared with garlic, onions, and carrots which all provide vitamins that increase circulation and reduce inflammation. In addition, the liquid will keep you hydrated. Last but not least, it is usually delicious. Nothing drives people mad quite like getting the hiccups. If you are fortunate, they will only last for a few minutes. Yet in some cases, nothing seems to drive them away. Next time you have a bad case of the hiccups, try this sweet solution. Take a full teaspoon with sugar and swallow it down. The sugar is thought to change instructions to your nerves and get your throat muscles to relax. Just don’t overdo it, or else you might have to go to the dentist to get some cavities fixed. Headaches are another annoyance that we can do all without. If you get one, try this home remedy which doesn’t require taking any food or liquids at all. Instead, try putting a pencil in between your teeth. A major cause of headache is stress, and when we are anxious, we often tighten our jaws, which strains a muscle that connects to the temples of our head, and this action causes the pain. By placing a pencil in our mouths, we are giving our minds a signal to relax our jaw. This can reduce the intensity of headaches almost immediately. Just remember not to bite down, unless you are in the mood for a lead sandwich.
7. Why should you put a pencil between your teeth when you have a headache?

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Were there any calls for me? – Yes, ............. rang while you were out.

Choose the letter A, B, C or D to complete the sentences with given words:
 They/ talk/ about/ young/ pop star/ now.

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 :
Laughing is good for the body and the mind. When we laugh we breathe more oxygen into our body, (1) _______ helps to keep us healthy. Endorphins, or happy chemicals, are released in the body, and you feel more relaxed and happy. Laughter also brings people together to (2) _______ some fun. Companies who have run laughter yoga workshops find that they have advantages for both employers and employees. People who are happy at work are more hard-working and (3) _______more money for the company. Also, people who can laugh together (4) _______more successfully. In general, people do better at work when they feel happy and relaxed. A Danish company who used Laughter Yoga for a year reported an increase (5) _______sales of 40 percent over the previous year. Following Laughter Yoga session, a Hawaiian timeshare company reported the highest sales of the year – double their target figures.