Scientists have discovered the bones of what may be the largest meat-eating dinosaur ever to walk the earth. The discovery was made by a team of researchers from Argentina and North America in Patagonia, a desert on the eastern slopes of the Andes in South America. Besides the interesting fact that the dinosaur was huge and horrifying, it is even more astounding that the bones of a number of the dinosaurs were found together. This discovery challenges the prior theory that the biggest meat-eaters lived as loners and instead indicates that they may have lived and hunted in packs. The Tyrannosaurus Rex lived in North America and was believed to hunt and live alone.

The newly discovered meat-eater appears to be related to the Giganotosaurus family, being as closely related to it as a fox would be to a dog. It is actually not of the same family at all as the Tyrannosaurus Rex, being as different from it as a cat is from a dog.

The fossilized remains indicate that the animals lived about 100 million years ago. With needle-shaped noses and razor sharp teeth, they were larger than the Tyrannosaurus Rex, although their legs were slightly shorter, and their jaws were designed to be better able to dissect their prey quickly and precisely.

The word horrifying in the first paragraph is closest in meaning to ________.

  

Choose the letter A, B, C or D to answer these following questions:
Swimming is the sport or activity of propelling oneself through water using the limbs. Swimming can be both an individual or team sport. There are a number of different swimming styles including breaststroke, freestyle, backstroke and butterfly. 
Swimming is for everyone no matter what age or level of fitness. Any age can learn to swim and there is no age limit on when you can no longer swim. Swimming is a lifelong skill that could save your or another’s life. It is never too late to learn to swim. Swimming is an excellent way to keep fit and most swimming pools cater for all.. We would also suggest goggles to protect eyes. Most swimming pools have classes for all levels of ability, from adult only to toddler beginner’s lessons. Time tables and your local pools are available on our website.

Which kinds of outfit shouldn’t swimmers wear?

Read the text below and decide which answer (A,B,C, or D) best fits each space.
The heart has long been considered to be (1) feelings of love dwell. In love songs throughout  the ages, love almost always goes together (2) the heart. The heart has continuously been  viewed (3) the place where love begins and develops. Even the Bible gives (4) to love and the  heart. 
The role of the heart in love must come from what happens to it when a person feels strongly (5) to someone. The strong feelings (6) the other person, especially in the early stages of a relationship, have the results that the heart starts beating faster and  breathing starts speeding (7) . 
According to psychologists, a love relationship is a situation that (8) a lot of stress and the body reacts to this by getting ready to face the unknown. This has been called the  "fight or flight" (9) accelerates and (10) , meeting danger by fighting it or running away. So  with love, the heart becomes quick. 

Câu 4.........................

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

"A water polo team consists (1)…… seven players - a goalkeeper and six field players. The goalkeeper must defend the goal without hanging onto the goal or using the side of the pool. Each team also may have six (2)…..  players. With the exception of the goalkeeper, each player may use only one hand at a time in (3) …… the ball. Players wear caps of different colors for team (4)…. ; the official rules stipulate white for one team, blue for the other, and red caps for the goalies.
 A match requires two referees, two goal judges, two timekeepers, and two recorders. Games are divided (5) …..four periods of 7 minutes each, with a 2-minute interval between periods. Play begins when the (6)….. , with each team spread out along its own goal line, throws the ball into play at a line halfway between the two teams. The players race toward the ball, and the team that gains (7)…… then attempts to advance it toward the opponent's goal by (8)….. it from teammate to teammate. Players can also swim with the ball by pushing it along the water surface with their bodies as they swim.
 Players may not use more than one hand at a time and may not (9)…. clenched fists. No players - except the goalie, when defending a goal in a pool with a shallow end - may walk on or use the bottom of the pool, (10)….. may they take the ball beneath the surface of the water. Players may not impede the free-limb movement of another player unless that player holds the ball."

9. Players may not use more than one hand at a time and may not (9)…. clenched fists. 

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

There is very little documentation about the origins of water polo. It is known, however, that the sport originated in the rivers and lakes of mid-19th century England as an aquatic version of rugby. Early games used an inflated rubber ball that came from India known as a "pulu" (the single Indian word for all "balls"). Pronounced "polo" by the English, both the game and the ball became known as "water polo". To attract more spectators to swimming exhibitions, the London Swimming Association designed a set of water polo rules for indoor swimming pools in 1870. At first, players scored by planting the ball on the end of the pool with both hands. A favorite trick of the players was to place the five-to-nine inch rubber ball inside their swimming suit and dive under the murky water, they would then appear again as close to the goal as possible. The introduction of the rules by Scottish players changed the nature of water polo. It became a game that emphasized swimming, speed and passing. Scottish rules moved from a rugby variant to a soccer style of play. Goals became a cage of 10x 3 feet and a goal could be scored by being thrown. Players could only be tackled when they "held" the ball and the ball could no longer be taken under water. The small rubber ball was replaced by a leather soccer ball. If the player came up too near the goal, he was promptly jumped on by the goalie, who was permitted to stand on the pool deck. Games were often nothing more than gang fights in the water as players ignored the ball, preferring underwater wrestling matches that usually ended with one man floating to the surface unconscious. Water polo was first played in the USA in 1888. The game featured the old rugby style of play which resembled American football in the water. "American style" water polo became very popular and by the late 1890s was played in such venues as Madison Square Garden and Boston's Mechanics Hall, attracting 14,000 spectators to national championship games.

The present water polo ball is made of _______.

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.

   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication – having a mobile phone shows that they are cool and connected.

   The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

   On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn’t remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer’s doctor didn’t agree.

   What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

   As the discussion about their safety continues, it appears that it’s best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it’s wise not to use your mobile phone too often.

According to the passage, cellphones are especially popular with young people because ______.

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.

   In the 1960s, The Beatles were probably the most famous pop group in the whole world. Since then, there have been a great many groups that have achieved enormous fame, so it is perhaps difficult now to imagine how sensational The Beatles were at that time. They were four boys from the north of England and none of them had any training in music. They started by performing and recording songs by black Americans and they had some success with these songs. Then they started writing their own songs and that was when they became really popular. The Beatles changed pop music. They were the first pop group to achieve great success from songs they had written themselves. After that it became common for groups and singers to write their own songs. The Beatles did not have a long career. Their first hit record was in 1963 and they split up in 1970. They stopped doing live performances in 1966 because it had become too dangerous for them - their fans were so excited that they surrounded them and tried to take their clothes as souvenirs! However, today some of their songs remain as famous as they were when they first came out. Throughout the world, many people can sing part of a Beatles song if you ask them.

The tone of the passage is that of __________

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.

   Traditionally in America, helping the poor was a matter for private charities or local governments. Arriving immigrants depended mainly on predecessors from their homeland to help them start a new life. In the late 19th and early 20th centuries, several European nations instituted public-welfare programs. But such a movement was slow to take hold in the United States because the rapid pace of industrialization and the ready availability of farmland seemed to confirm the belief that anyone who was willing to work could find a job.

   Most of the programs started during the Depression era were temporary relief measures, but one of the programs Social Security – has become an American institution. Paid for by deductions from the paychecks of working people, Social Security ensures that retired persons receive a modest monthly income and also provides unemployment insurance, disability insurance, and other assistance to those who need it. Social Security payments to retired persons can start at age 62, but many wait until age 65, when the payments are slightly higher. Recently, there has been concern that the Social Security fund may not have enough money to fulfill its obligations in the 21st century, when the population of elderly Americans is expected to increase dramatically. Policy makers have proposed various ways to make up the anticipated deficit, but a long-term solution is still being debated. In the years since Roosevelt, other American presidents have established assistance programs. These include Medicaid and Medicare; food stamps, certificates that people can use to purchase food; and public housing which is built at federal expense and made available to persons on low incomes. Needy Americans can also turn to sources other than the government for help. A broad spectrum of private charities and voluntary organizations is available. Volunteerism is on the rise in the United States, especially among retired persons. It is estimated that almost 50 percent of Americans over age 18 do volunteer work, and nearly 75 percent of U.S. households contribute money to charity.

It took welfare programs a long time to gain a foothold in the U.S. due to the fast growth of______.

Read the text below and decide which answer (A,B,C, or D) best fits each space.
THE HISTORY OF FOOTBALL

Football, or soccer, which is so popular all over the world, dates back to the Middle Ages.  At  that  (58)  ……..  it  was  very  different   from  the  game  we  play  today.  Any number of players could (59) …….. part and the matches usually developed into a free- for-all. In its modern (60) …….. , football is less than two hundred years old.

In 1846, the  first  rules  to  govern  the  game were  drawn (61) …….. at  Cambridge University. The number of players was (62) …….. to 11 per side, which made things much more (63) …….. than before. Later, in 1863, the Football Association was (64)…….. up to help promote the game in Britain.

The game is played on a grass or artificial (65) …….. with a goal net at each end. The (66) …….. is to move the ball around the field, (67) …….. the feet or head, until a player is in a (68) …….. to put the ball into the net and score a goal.

Professional football is not only the most popular (69) …….. sport in the world, (70)…….. also more people actually play football themselves than any other team sport. In 1904 FIFA, the world governing (71) …….. of football, was founded. It organizes the World Cup tournament every four years. Other kinds of football are popular, but less (72) …….. , for example American Football and Australian Rules Football.

60.................

Read the text below and decide which answer (A,B,C, or D) best fits each space.
In a world where 2 billion people live in homes that don't have light bulbs, technology holds  the key (1)_______ banishing poverty. Even the simplest technologies can transform lives and  save money. Vaccines, crops, computers and sources of solar energy can all reduce poverty in  developing countries. For example, cheap oral-rehydration therapy developed in Bangladesh  has dramatically cut the death (2) _______ from childhood diarrhoea. 
But even when such technologies exist, the depressing fact is that we can’t make them (3)  _______ for those who most need them. Solar panels, batteries and light bulbs are still beyond  the purse of many, but where they have been installed they change lives. A decent light in the evening gives children more time for homework and extends the productive day for adults.  Kenya has a thriving solar industry and six years ago Kenyan pioneers also (4) _______  connecting schools to the Internet via radio links. These people were fortunate (5) _______  being able to afford solar panels, radios and old computers. How much bigger would the  impact be if these things (6) _______ and priced specifically for poor people? Multinationals must become part of the solution, because (7)_______ they own around 60 per  cent of the world's technology, they seldom make products for poor customers. Of 1,223 new  drugs marketed worldwide from 1975 to 1996, for example, just 13 were for tropical diseases. People think those enterprises should do more to provide vital products such as medicines (8) _______ different prices around the world to suit (9) _______ people can afford.  Alternatively, they could pay a percentage of their profit towards research and development  for (10) _______. 

Question 5: .....................

Read the text below and decide which answer (A,B,C, or D) best fits each space.
In a world where 2 billion people live in homes that don't have light bulbs, technology holds  the key (1)_______ banishing poverty. Even the simplest technologies can transform lives and  save money. Vaccines, crops, computers and sources of solar energy can all reduce poverty in  developing countries. For example, cheap oral-rehydration therapy developed in Bangladesh  has dramatically cut the death (2) _______ from childhood diarrhoea. 
But even when such technologies exist, the depressing fact is that we can’t make them (3)  _______ for those who most need them. Solar panels, batteries and light bulbs are still beyond  the purse of many, but where they have been installed they change lives. A decent light in the evening gives children more time for homework and extends the productive day for adults.  Kenya has a thriving solar industry and six years ago Kenyan pioneers also (4) _______  connecting schools to the Internet via radio links. These people were fortunate (5) _______  being able to afford solar panels, radios and old computers. How much bigger would the  impact be if these things (6) _______ and priced specifically for poor people? Multinationals must become part of the solution, because (7)_______ they own around 60 per  cent of the world's technology, they seldom make products for poor customers. Of 1,223 new  drugs marketed worldwide from 1975 to 1996, for example, just 13 were for tropical diseases. People think those enterprises should do more to provide vital products such as medicines (8) _______ different prices around the world to suit (9) _______ people can afford.  Alternatively, they could pay a percentage of their profit towards research and development  for (10) _______. 

Question 3:...................

Fill in each numbered blank with one suitable word or phrase

Rowing is a sport in which athletes race against each other on river, lakes or on the ocean, (1) _____ on the type of race and the discipline. The boats are propelled by the reaction forces on the oar blades (2) _____ they are pushed against the water. The sport can be both recreational, focusing (3)____ learning the techniques required, and competitive where overall fitness plays a large role. It is also one of (4) _____ oldest Olympic sports. In the United States, Australia and Canada, high school and collegial rowing is sometimes referred to as crew.

(5) _____ rowing, the athlete sits in the boat facing backwards, towards the stern, and uses the oars which are held in (6) ____ by the oarlocks to propel the boat forward, towards the bow. It is a demanding sport requiring strong core balance as well as physical (7) _____ and cardiovascular endurance.

Since the action of rowing (8) _____ fairly popular throughout the world, there are many different types of (9) _____. These include endurance races, time trials, stake racing, bumps racing, and the side-by-side format used in the Olympic Games. The many different formats are a result of the long (10) _____ of the sport, its development in different regions of the world, and specific local requirements and restrictions.

(6) ________

Read the text below and decide which answer (A,B,C, or D) best fits each space.
The next generation of telephone users will probably laugh (1) _______ we explain how we  used to stand next to a wall in the kitchen to (2) _______ a phone call. Mobile  communications, already highly advanced compared with a decade ago, will completely  change communications in the next few years. (3) _______ there are millions of people using  mobile phones, most people know (4) _______ about the mobile telecommunications industry  and its technology. 
There are three types of mobile phone. These are hand portables, pocket-sized hand portables and transportables. The smallest and most popular are the pocket-sized hand portables. These  work on rechargeable batteries, which allow an (5) _______ of up to 80 minutes'  conversation. Mobiles that are fitted permanently in a vehicle do not (6) _______ on separate  batteries. They require an external aerial on the vehicle. This can mean a stronger signal with  clearer (7) _______. Transportables have a high power capability and can be used (8)  _______ anywhere. They come with powerful battery packs for longer, continuous use and  may also be put (9) _______ a vehicle, using its electrics. They (10) _______ to be bulkier  than hand portables. 

Câu 8.....................

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

"A water polo team consists (1)…… seven players - a goalkeeper and six field players. The goalkeeper must defend the goal without hanging onto the goal or using the side of the pool. Each team also may have six (2)…..  players. With the exception of the goalkeeper, each player may use only one hand at a time in (3) …… the ball. Players wear caps of different colors for team (4)…. ; the official rules stipulate white for one team, blue for the other, and red caps for the goalies.
 A match requires two referees, two goal judges, two timekeepers, and two recorders. Games are divided (5) …..four periods of 7 minutes each, with a 2-minute interval between periods. Play begins when the (6)….. , with each team spread out along its own goal line, throws the ball into play at a line halfway between the two teams. The players race toward the ball, and the team that gains (7)…… then attempts to advance it toward the opponent's goal by (8)….. it from teammate to teammate. Players can also swim with the ball by pushing it along the water surface with their bodies as they swim.
 Players may not use more than one hand at a time and may not (9)…. clenched fists. No players - except the goalie, when defending a goal in a pool with a shallow end - may walk on or use the bottom of the pool, (10)….. may they take the ball beneath the surface of the water. Players may not impede the free-limb movement of another player unless that player holds the ball."

10. use the bottom of the pool, (10)….. may they take the ball beneath the surface of the water.

Fill in each numbered blank with one suitable word or phrase

Rowing is a sport in which athletes race against each other on river, lakes or on the ocean, (1) _____ on the type of race and the discipline. The boats are propelled by the reaction forces on the oar blades (2) _____ they are pushed against the water. The sport can be both recreational, focusing (3)____ learning the techniques required, and competitive where overall fitness plays a large role. It is also one of (4) _____ oldest Olympic sports. In the United States, Australia and Canada, high school and collegial rowing is sometimes referred to as crew.

(5) _____ rowing, the athlete sits in the boat facing backwards, towards the stern, and uses the oars which are held in (6) ____ by the oarlocks to propel the boat forward, towards the bow. It is a demanding sport requiring strong core balance as well as physical (7) _____ and cardiovascular endurance.

Since the action of rowing (8) _____ fairly popular throughout the world, there are many different types of (9) _____. These include endurance races, time trials, stake racing, bumps racing, and the side-by-side format used in the Olympic Games. The many different formats are a result of the long (10) _____ of the sport, its development in different regions of the world, and specific local requirements and restrictions.

(1) ________

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 26 to 30.
The Best Students
According to most professors, mature students are ideal students because they are hard-working and become actively involved in all aspects of the learning process. The majority of mature students have a poor educational (26) ________ but they manage to do exceptionally well at tertiary level. (27) _______ many of them have a job and children to raise, they are always present at seminars and lectures and always hand in essays on time. They like studying and writing essays and they enjoy the class discussions (28) _______ take place. Consequently, they achieve excellent results. In fact, as they have experienced many of life's pleasures, they are content with their lives and this has a positive effect on their attitude, making them eager to learn.
On the other hand, despite their enthusiasm and commitment, mature students suffer from anxiety. The fact that they have made (29) ______ sacrifices to get into university puts extra pressure on them to succeed. Nevertheless, completing a degree gives mature students a sense of achievement, (30) ______ their confidence and improves their job prospects.

Question 28:................

Fill in each numbered blank with one suitable word or phrase

Rowing is a sport in which athletes race against each other on river, lakes or on the ocean, (1) _____ on the type of race and the discipline. The boats are propelled by the reaction forces on the oar blades (2) _____ they are pushed against the water. The sport can be both recreational, focusing (3)____ learning the techniques required, and competitive where overall fitness plays a large role. It is also one of (4) _____ oldest Olympic sports. In the United States, Australia and Canada, high school and collegial rowing is sometimes referred to as crew.

(5) _____ rowing, the athlete sits in the boat facing backwards, towards the stern, and uses the oars which are held in (6) ____ by the oarlocks to propel the boat forward, towards the bow. It is a demanding sport requiring strong core balance as well as physical (7) _____ and cardiovascular endurance.

Since the action of rowing (8) _____ fairly popular throughout the world, there are many different types of (9) _____. These include endurance races, time trials, stake racing, bumps racing, and the side-by-side format used in the Olympic Games. The many different formats are a result of the long (10) _____ of the sport, its development in different regions of the world, and specific local requirements and restrictions.

(5) ________

Walt Disney was born in 1901 in Chicago, but soon moved to a small farm near Marceline, Missouri. From this rural and rather humble beginning he later became one of the most famous and beloved motion-picture producers in history. Although he died in 1966, his name and artistic legacy continue to influence the lives of millions of people throughout the world.
After several years of barely making ends meet as a cartoon artist operating from his Los Angeles garage, Disney had his first success in 1928, with his release of a Mickey Mouse cartoon. Throughout the next decade, he continued to produce a number of cartoons, and develop more of his highly profitable and enduring creations, such as Donald Duck and Pluto. In the late 1930s, he issued full-length cartoon film. Snow White became an instant commercial and critical success. This was only the first of many films, both animated and not, produced by Disney and his studio.
But as renowned as Disney name is for cartoon and monies, it is probably best known for a string of spectacular amusement and theme parks. Starting with California's Disneyland in 1955 and culminating with the fantastically successful Disney World and EPCOT Center in Florida, Disney became a household name. In recent years, the theme park concept became international, with openings in Toyo and Paris. With the continuing success of Disney, the creation of future theme park are under discussion.

The word "enduring" in bold in paragraph 2 is closest in meaning to _______.

Read the passage carefully, then choose the correct answer: 
Underwater hockey is a non-contact sport in which two teams compete to maneuver a puck across the bottom of a swimming pool into goals. 
Players wear a diving mask, fins, speedos and a snorkel for play_ Safety gear includes a water polo style cap, a mouthguard, and a glove for the playing hand (to protect against pool-bottom abrasion and, in some designs, knuckle protection against puck impact). Because current rules permit a player to switch the stick between hands mid-play, players may choose to wear a protective glove on both hands. The stick is quite short (not more than 350 mm in length, including the handle) and is colored white or black to indicate the player's team.
Two teams of up to ten players compete, with six players on each team in play at once. Substitution happens continually from a substitution area, which may be on deck or in the water outside the playing area, depending on tourna went rules. Before the start of play the puck is placed in the middle of the pool, and the players wait in the water, touching the wall above the goals they are defending. At the start-of-play signal, in- play members of both teams are free to swim anywhere in the play area and try to score by sending the puck into the opponents' goal. Play continues until either a goal is scored, and players return to their wall to start a new point, or a break in play is signaled by a referee. 
There are a number of penalties described in the official underwater hockey rules, ranging from use of the stick against something (or someone) other than the puck or the playing surface, playing or stopping the puck with something other than the stick, and "screening". If the penalty is minor, referees award an advantage puck - the team that committed the foul is pushed back 3 meters from the puck, while the other team gets a free possession. For major penalties, such as a dangerous pass or intentional or repeated fouls, the referees may eject. players for a specified period of time or the remainder of the game. A defender committing a serious foul sufficiently close to his own goal may be penalized by the award of a point to the fouled player's team.
Games consist of two halves, typically ten to fifteen minutes in length (depending on tournament rules; 15 minutes at world championship tournaments) and a short half time interval. At half time the two teams switch ends.

Which of the following is NOT true?

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.

   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication – having a mobile phone shows that they are cool and connected.

   The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

   On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn’t remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer’s doctor didn’t agree.

   What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

   As the discussion about their safety continues, it appears that it’s best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it’s wise not to use your mobile phone too often.

The man mentioned in the passage, who used his cellphone too often, ______.

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.

   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication – having a mobile phone shows that they are cool and connected.

   The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

   On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn’t remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer’s doctor didn’t agree.

   What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

   As the discussion about their safety continues, it appears that it’s best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it’s wise not to use your mobile phone too often.

The word “means” in the passage most closely means ______.