Read the following passage and mark the letter A, B, C, or D to indicate the word that best fits each of the blanks from 6 to 10.
HOLIDAYS
We've just come back exhausted after a two-week holiday in France. We were really stupid. On the last day we drove non-stop from Marseille to Calais- we should have (6)           our journey in Lyon or Paris.   As if that wasn't enough, the sea was so rough in the English Channel that the (7)         took three hours instead of one and a half. Next year we've decided we're going on a cheap (8)           holiday to Italy. It sounds marvellous- the cost of the flight, the hotel and all our meals are (9)             in the price. While we're in Rome we'll be going on a guided tour of the Coliseum. The last time I was in Italy, I was on a business trip - I can't say I saw many of the famous tourist (10)                 on that occasion.
(10)..............................

Read the text below and decide which answer (A,B,C, or D) best fits each space.
Tattooing is an old art. In ancient Greece, people who had tattoos were regarded  asmembers of the (16)____classes. On the other hand, tattooing was  (17)_____in Europe by the early Christians, who thought that it was a sinful  thing to(18) .It was not until the late 18th century, when Captain Cook  saw South Sea Islander decorating their bodies with tattoos that attitudes began  to change. Sailors came back from these islands with pictures of Christ on their  backs and from then on, tattooing (19)_____in popularity. A survey by the  French army in 1881 (20)_____that among the 387 men (21)_______ there were  1,333 designs. Nowadays, not everybody finds tattoos acceptable. Some people  thing that getting one is silly because tattoos are more or less permanent. There  is also some (22)_____about (23)_____ a blood disease from unsterilized needles. Even for those who do want a tattoo, the (24)_____of getting one is not  painless, but the final result, in their eyes, is (25)______the pain. 

18.....................

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 31 to 35.
Back in the 1960s and 1970s, the world was becoming more aware of the destructive effects of industry (31)________ the environment and people were starting to think seriously about ways of protecting the environment. One man who was particularly affected by this subject was Gerard Morgan-Grenville. As Morgan-Grenville travelled round earning his living as a gardener, he noticed signs of the damage that was being done to the countryside around him. It wasn't long before Morgan-Grenville decided that he had to do something about this situation. He felt that if people could be shown a better way of living then maybe they would be interested enough to try to protect their (32)________ environment.
Mr. Morgan-Grenville decided to set up a   project (33)________ would prove what was happening  to our surroundings and what could be done about it. So, in 1975, Morgan-Grenville created the Centre for Alternative Technology (CAT) in a village in Wales.
The main aim of CAT is to search for an ecologically better way of living by using technology which (34)________ no harm to the environment. One of the most important things CAT did initially was to explore  and demonstrate a wide range of techniques and to point out which ones had the least destructive results on the world around us. (35)________ , CAT provides information and advice to people all over Britain and all over the world. If more and more individuals are informed about how much damage our modern lifestyle is causing to the planet, maybe more of them would be prepared to look for practical solutions to environmental problems.
(33).....................

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.

I’m standing on a sidewalk in the early morning. The great avenues of Paris are silent, and the shops are closed. Suddenly, a couple appeared from a hole in the sidewalk. Mud covers their boots. They place the iron cover over the hole and run down the street, smiling. The couple had been exploring the tunnels beneath the city.

When Romans occupied Paris, they cut down stone from deep within the earth to build their city. Later, the French used more stone to construct the Notre Dame Cathedral. This left huge underground tunnels upon which part of the city now. Once used for growing mushrooms and as a hiding place, today they are mostly forgotten, except by "cataphiles" - those who love to go down into the tunnels below Paris, even though it is actually not permitted.

In the 70s and 80s, it is easier to enter the tunnels because there were many more open entrances through forgotten doorways and into catacombs - rooms filled with bones. The bones had been moved into the tunnels to solve the problem crowded cemeteries. By the end of the 1980s, most of the entrances were shut and police regularly walked the tunnels. However, there are still cataphiles, like the couple I saw that morning, and for those who dare, the underground is an exciting place to meet, party, perform for each other or create art.

My own experience began beneath the old Paris opera house, where sewer workers showed me a 55-meter-long underground pond, a pond that actually had fish in it! Later, at France's national bank, officials guided me below to an amazing room filled with 2,600 tons of gold.

As cataphiles are the best guides, I then asked one of the cataphiles to give me a tour. Descending into the underground through a secret entrance beneath a bridge, we walked for hours through catacombs, and galleries of huge, bright paintings. The cataphile told me "Many people come down here to party, some to paint. Some people to destroy or to create or to explore. We do what we want, We don't have rules..."

(Adapted from Reading Explorer 2, Paul Macintyre&David Bohlke, 2015)

What is the reading mainly about?

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks. 
At present, single-parent families ought to be of great focus, be recognized and supported as they are a growing family form and should not be an afterthought in family, economic and labor market policies. Single parent families should be (25) _______ considered and addressed in all family policy discussions and decisions. (26)________, home-care cash allowances, which are paid to a parent who abstains from employment to take care for her child at home, can have significant consequences encouraging lower levels of female employment among single-parent families, (27)________ in turn results in higher childhood poverty. In this regard, work-life balance policies and workplace practices also need to (28)________ a single-parent perspective, for example, the impact of non-standard work hours when childcare is not available.
The provision of educational and skill-building opportunities and affordable quality day care become even more urgent in families with single parents. Such families should have a higher priority and subsidized access to childcare facilities. Governmental agencies should be established (29)________ child support payment from non-resident parents in case of conflicts, disagreements or delayed payments, e.g., after a divorce or separation.

In this regard, work-life balance policies and workplace practices also need to (28)________ a single-parent perspective, for example, the impact of non-standard work hours when childcare is not available.

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 1 to 5.
BOOKS
Nearly all the discoveries that have been made through the ages can (1)________ in books. The invention of the book is one of humankind’s (2)________ achievements,  the importance of which can not be evaluated. Books are very useful, providing us with both entertainment and information. The production of books began in Ancient Egypt, though not in the form that is accessible to us today. The books read by Romans, (3)________ , have some similarities to the ones we read now. Until the middle of the 15th century, in Europe, all books were written by hand. They (4)________ often beautifully illustrated and always rare and expensive. With printing came the possibility of cheap, large publication and distribution of book making (5) ________ more widespread and reliable.
(3)..........................

Read the text below and decide which answer (A,B,C, or D) best fits each space.
Statesmen define a family as ―a group of indivi duals having a commo n  dwelling andrelated by blood, adoption or marriage, (1) includes common law relationships.‖ Most people are born into one of these groups and (2) live their lives as a family in such a group.Although the definition of a  family may not change, (3).relationship of people to each other within the family  group changes as society changes. More and more wives are (4) paying jobs,  and, as a result, the roles of husband, wife and children are changing. Today,  men expect to(5) . for pay for about 40 years of their lives, and, in today‘s  marriages(6) . which both spouses have paying jobs, women can expect to  work for about 30 to 35 years of their lives. This mean that man must learn to do  their share of family tasks such as caring for the children and daily (7) chores.  Children, too, especially adolescents, have to (8) with the members od their  family in sharing household tasks. The widespread acceptance of contraception  has meant that having (9) is as matter of choice, not an automatic result of  marriage. Marriage itself has become a choice. As alternatives (10)  common-law relationships and single-parent families have become socially  acceptable, women will become more independent. 

1)...................

Light from a living plant or animal is called bioluminescence, or cold light, to distinguish it from incandescence or heat-generating light. Life forms could not produce incandescent light without being burned. Their light is produced in chemicals combining in such a way that little or no measurable heat is produced, and the life forms generating it are unharmed. Although bioluminescence is a relatively complicated process, it can be reduced to simple terms. Living light occurs when luciferin and oxygen combine in the presence of luciferase. In a few cases, fireflies the most common, an additional compound called ATP is required.
The earliest recorded experiments with bioluminescence in the late 1800s are attributed to Raphael Dubois, who extracted a luminous fluid from a clam, observing that it continued to glow in the test tube for several minutes. He named the substance luciferin, which means “the bearer of life”. In further research, Dubois discovered that several chemicals were required for bioluminescence to occur. In his notes, it was recorded that a second important substance, which he called luciferase, was always present. In later study of small, luminous sea creatures, Newton Harley concluded that luciferin was composed of carbon, hydrosen, and oxygen, which are the building blocks of all living cells. He also proved that there are a variety of luciferin and luciferase, specific to the plants and animals that produce them.
Much remains unknown, but many scientists who are studying bioluminescence now believe that the origin of the phenomenon may be traced to a time when there was no oxygen in the Earth’s atmosphere. When oxygen was gradually introduced to the atmosphere, it was actually poisonous to life forms, plants and animals produced light to use up the oxygen in a gradual but necessary adaptation. It is speculated that millions of years ago, all life may have produced light to survive. As the millennia passed, life forms on Earth became tolerant of, and finally dependent on oxygen, and the adaptation that produced bioluminescence was no longer necessary, but some primitive plants and animals continued to use the light for new functions such as mating or attracting prey.

According to the author, why has bioluminescence continued in modem plants and animals?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.
Parents and teachers are always smaking (31)________ between the time when they were children and the present generation . They say everything was better than it is today, especially ineducation. (32)________ , they say they used to work much harder in school, and that nowadays, we aren't  very interested. I disagree, because we spend hours every day doing homework after our lessons or (33)________ for exammination. I wonder (34)________ our parents really had to study somuch after school every day. In my opinion, it is no exaggeration to say we have forgotten how to play. I think one reason whykids (35)________ in class is because they need to get rid ofstress.
(34).....................

SHOPPING MALLS
Victor Gruen, an American architect, revolutionized shopping in the 1950s by creating the type of shopping centre that we now call a shopping mall.
Gruen's (31) _______ was to provide a pleasant, quiet and spacious shopping environment with large car parks, which usually meant building in the suburbs. He also wanted people to be able to shop in all kinds of weather. He (32) _______ on using building designs that he knew people would feel comfortable with, but placed them in landscaped ‘streets’ that were entirely enclosed and often covered with a curved glass roof. This was done to (33) _______ some of the older shopping arcades of city centres, but while these housed only small speciality shops, Gruen's shopping malls were on a much grander scale.
Access to the whole shopping mall was gained by using the main doors, which (34) _______ the shopping ‘streets’ from the parking areas outside. As there was no need to keep out bad weather, shops no longer needed windows and doors, and people could wander (35) _______ from shop to shop. In many cities, shopping malls now contain much more than just shops; cinemas, restaurants and other forms of entertainment are also growing in popularity.
(33)..............................................................
 

SHOPPING MALLS
Victor Gruen, an American architect, revolutionized shopping in the 1950s by creating the type of shopping centre that we now call a shopping mall.
Gruen's (31) _______ was to provide a pleasant, quiet and spacious shopping environment with large car parks, which usually meant building in the suburbs. He also wanted people to be able to shop in all kinds of weather. He (32) _______ on using building designs that he knew people would feel comfortable with, but placed them in landscaped ‘streets’ that were entirely enclosed and often covered with a curved glass roof. This was done to (33) _______ some of the older shopping arcades of city centres, but while these housed only small speciality shops, Gruen's shopping malls were on a much grander scale.
Access to the whole shopping mall was gained by using the main doors, which (34) _______ the shopping ‘streets’ from the parking areas outside. As there was no need to keep out bad weather, shops no longer needed windows and doors, and people could wander (35) _______ from shop to shop. In many cities, shopping malls now contain much more than just shops; cinemas, restaurants and other forms of entertainment are also growing in popularity.

(31).............................................................

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

The concept of traffic-free shopping areas goes back a long time. During the Middle Ages, traffic-tree shopping areas were built in Middle Eastern countries to allow people to shop in comfort and, more importantly, safety. As far back as 2000 years ago, road traffic was banned from central Rome during the day to allow for the free movement of pedestrians.

The modern, traffic-free shopping street was born in Europe in the 1960s, when both city population and car ownership increased rapidly. Dirty exhaust from cars and the risks involved in crossing the road were beginning to make shopping an unpleasant and dangerous experience. Many believed the time was right experimenting with car-free streets, and shopping areas seemed the best place to start.

At first, there was resistance from shopkeepers. They argued that people would avoid streets if they unable to get to them in their cars. When the first streets in Europe were closed to traffic, there were noisy demonstrations, as many shopkeepers predicted they would lose customers.

With the arrival of the traffic-free shopping street, many shops, especially those selling things clothes, food and smaller luxury items, prospered. Unfortunately, shops selling furniture and larger electrical appliances actually saw their sales drop. Many of these were forced to move elsewhere, away from centre.

(Adapted from Complete IELTS)

The word prospered in paragraph 4 is closest in meaning to ________.

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

When I saw her name on the screen, it took me right back to the moment she had moved away with her family ten years before. We had been such close friends at primary school. To begin with, she and I had not hit it off, perhaps because we were both timid. We had quickly got over that, though, and as time went on, we had become really good friends, until you almost never saw one of us without the other.

And now after so much time apart, there was her name. She had sent me a friend request. I knew she had been living abroad, and her profile picture showed her on the beach. I had been expecting her to look different after ten years. The girl in the photo was the same old Lauren, though.

Nowadays, it is easy to find old friends thanks to social networking sites. There are lots of stories about long lost friends getting back in touch after years apart. It was odd because I had been thinking about our friendship too and now here she was!

She told me about the place where she had been living for the past ten years, and I told her about things that had happened to me. Before long, the years melted away and we were the same two girls who had spent so much time together. Of course, true friends are loyal and listen to you when you are down. And they are the people you have fun with. But deep down, I realised that the truest friends are those you are most yourself with. And that is something that never changes. That is what Lauren and I learned that day, the day we realised our friendship was so precious and had never really ended in the first place.

(Adapted from Optimise)

Which of the following can be inferred from the passage?

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. 
      Sixty percent of working Americans today say they’ve left a job, or considered leaving a job, because they didn’t like their direct supervisor, according to a survey from human resource consulting firm Randstad US. Though leaving a job may seem like the best solution for retiring a bad boss, that doesn’t mean that it’s always the best plan for your career. In fact, if you’re in a situation where you love your job and the opportunities it presents, then leaving your role because of a difficult boss may not be the best idea. Pollak and Monster.com career expert Vicki Salemi broke down three ways you can deal with a bad boss without quitting a job you love. 
      Pollak says that in many cases, a difficult relationship with your boss is often due to differing personalities and habits. One way to mend this relationship, she says, is to closely study your boss’s behavior so that you can meet their expectations. “Become the world’s leading expert on your boss or your manager,” says Pollak, who is also the author of the book “The Remix: How to Lead and Succeed in the Multigenerational Workforce.” “How does this person like to communicate? If she hates long emails, stop sending long emails. If she doesn’t like it when you drop by her office but reacts better when you schedule an appointment, then learn to always schedule appointments instead of dropping in. If she is not a morning person, don’t ask for things in the morning. If this person is really detail-oriented, then triple check your documents before handing them in.” Salemi agrees. She says that if you have a boss who’s critical or a micromanager, often the best way to deal with them is to be proactive in meeting their needs. “It’s kind of like you’re managing them without making it seem like you’re managing them,” she says.
      When dealing with a difficult boss, Pollak says one of the best ways to figure out how to successfully work under their leadership is to talk to other people who you know have been in a similar situation. “Other people can be a resource, whether it’s a mentor, someone at a different company, a coach or people who have worked for this person in the past,” she says. “Treat it as a positive and say, ‘I really want to be successful working with X. What recommendations do you have?’” However, she emphasizes, you should never talk about the situation in a negative way, or say you don’t like working for your boss. Instead, discuss about the situation in a way that shows your willingness to adapt to make the relationship work.
      If talking to other colleagues isn’t helpful, then Pollak says one of your last options should be to talk directly to your boss. Consider your approach carefully. Instead of saying, “We’re not getting along. What should we do?”, say something to the effect of, “I’d really like to make sure that I’m serving your needs. I’d like to make sure that I’m communicating in a way that’s effective for you and I want to make sure that I’m being as productive as possible. Is there anything I can do differently?” This way, she says, you’re approaching the situation by asking how you can help, instead of emphasizing a problem.

The word “productive” in the last paragraph is closest in meaning to _____________.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.
On April 3, 1972, a man came out of the Hilton hotel in Manhattan and started walking down the street. He stopped, (31) his hand with a strange object in it, put it to his ear and started to talk into it. This was the beginning of mobile phone (32) , more than 30 years ago. That man was Motorola's project manager, Martin Cooper, who was (33) his 34th birthday that day. The strange object was the first mobile phone, which was nicknamed “the shoe” because of its  unusual (34)  .Mr. Cooper had gone to New York to introduce the new phone. The first call he made was to his rival, Joe Engel at AT&T's research centre. Engel was responsible for the development of the radiophones for cars. "I called him and said that I was talking on a real mobile phone (35)         I was holding in my hand," said Cooper. "I don't remember what he said in reply, but I'm sure he wasn't happy." The quality of the call was very good, because although New York had only one base station at that time, it was being used by only one user - Martin Cooper.
(35).....................

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. 
     The next time you are watching a film and you see one of the characters jumping out of a plane, falling off a horse, or being blown through a window - spare a (23) ______ for the stunt artist. Lots of people think that stunt artists are just "extras" who play small, unimportant parts in films and television. Nothing could be further from the truth. 
     A stunt artist must combine the skills of an actor with the physical abilities of a first- (24) _____________ athlete. He or she must be extremely fit, and highly trained in a number of activities like scuba-diving, horse riding, martial arts or parachuting. 
It is not easy to get started in a career as a stunt performer. Film and television producers look for experience and proven ability, as it is unlikely that they will take on a complete newcomer. However, because of the (25) ____________ of their profession, stunt artists tend to retire early. This means that new performers must be employed, or there will be no one to take (26) ______________ when the present generation quits. 
      Even when a stunt artist becomes well-known, the work is not regular. It may sometimes be necessary to travel to the other side of the world for a job which involves long hours and great physical danger. It is not a glamorous occupation either. Unlike the famous actors for (27) ____________ they sometimes risk their lives, few stunt artists are recognized in the street by adoring fans. 

  A stunt artist must combine the skills of an actor with the physical abilities of a first- (24) _____________ athlete

In “Cerealizing America”, Scott Bruce and Bill Crawford remark that the cereal  industry uses 816 million pounds of sugar per year. Americans buy 2.7 billion  packages of breakfast cereal each year. If (1) _______ end to end, the empty  cereal boxes from one year's consumption would (2) _______ to the moon and back. One point three (1.3) million advertisements for cereal are broadcast on  American television every year at a(n) (3) _______ of $762 million for airtime.  Only automobile manufacturers spend more money on television advertising  than the makers of breakfast cereal. (4) _______ of the boxed cereals found in  supermarkets contain large amounts of sugar and some contain more than 50%  sugar. Cereal manufacturers are very clever in their marketing, making many  cereals appear much healthier than they really are by “fortifying” them with vitamins and minerals. Oh, (5) ______ – you now have vitamin-fortified sugar! Before you eat any cereal, read the ingredient list and see how (6) _______  sugar appears on the ingredient list. Then check the “Nutrition facts” panel. 
There are actually only a small handful of national commercially-branded cereals  that are made (7) _______ whole grains and are sugar-free. If you shop at a health  food store instead of your local supermarket, you (8) _______ to find a healthy,  whole grain, sugar-free (or very low sugar) cereal. But (9) _______! Some of the  health food store boxed cereals are sweetened with fruit juice or fructose.  Although this may be an improvement (10) _______ refined white sugar, this can  really skyrocket the calories. 

7.......................

Fill in each numbered blank with one suitable word or phrase.

If you want to prepare yourself for great achievement and have more to (1) ______ to your education or your work, try reading more books. (2) ______ up some of the interestingly informative books and search for well-researched material that can help you grow. We should (3) ______ our children to read more books and (4) ______ less time watching TV. Some people have commented that this is inconsistent. "Why is the written word a superior way to get information than television?" That is (5) ______ interesting point of view worth further (6) ______. Reading is a skill that is in much greater demand than the demand for watching TV. There are no jobs that (7) ______ a person to be able to watch TV but reading is an integral part of many jobs. The written word is an incredibly flexible and efficient way of communication. You can write something down and, in no time, it can be (8) ______ to many different people. Not only that, we can (9) ______ vast amounts of information through reading in a very short time. A good reader can acquire more information in reading for two hours than someone watching TV can acquire in a full day. You are able to gain a lot of information quickly because you are a fast reader with good (10) ______ skills. It will save you massive amounts of time and you will be able to assimilate vast quantities of information.

(1) ______

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

AUDIOBOOKS - BOOKS ON CASSETTE

In the modern world, there is a wealth of leisure activities to choose from. Entertainment industries (26)________ for your leisure time. You can watch TV, listen to music, go to an art gallery or concert or, of course, read a book. Sometimes it seems that reading is (27)________because, even if you're a fast reader, it can take a (28)________amount of time to finish a novel, for example. But in the (29)________world, time is something that can be in short supply. Book publishers haven't been (30)________to realise this and are now selling a product which needn't (31)________as much of your time but still tells you an excellent story. The new product is the audiobook -cassette recordings of shortened novels, often read by well-known personalities or the authors themselves. Audiobooks are (32)________new but people are becoming more aware of them and sales are increasing all the time. One of the attractions of audiobooks is that they're (33)________listening to the radio. You can listen to what you want when you want, and you won't ever (34)________anything. Much of their appeal lies in their flexibility. They (35)________you to do other things while you're listening, such as driving or doing the housework. For some people, audiobooks can be a much more enjoyable way of gaining knowledge than reading.

(28)________

Read the text and choose the best answer (A, B, C or D) to each of the questions. 
Poles Apart
Many are surprised to learn that Antarctica is nearly twice the size of the United States. The name Antarctica was coined to mean "opposite to the Arctic." It is just that in many ways. Antarctica is a high, ice-covered landmass. In the Arctic the landmasses are grouped around the ice-covered Arctic Ocean.
Largely because of this difference, the climate of the two areas is very different. Antarctica is the coldest area in the world. On the average it is about 30 degrees colder than the Arctic. At the South Pole, nearly 10.000 feet high, monthly mean temperatures run well below zero. Only in coastal regions do temperatures sometimes rise about freezing in the summer (December to March). In contrast, near the North Pole monthly mean temperatures often rise above freezing. 
At both poles, daily temperatures may drop far below the monthly mean. At the American South Pole Station, winter temperatures sometimes fall below -100 degrees Fahrenheit. Elsewhere, on higher parts of the south polar plateau, even lower temperatures are recorded.
A temperature of -127 degrees Fahrenheit was measured in August 1960. It is the world's record low temperature.
Partly because of this climatic difference, the land animals and plants of the two regions are very different. On the continent of Antarctica, there are very few plants. In the Arctic there are many plants. In some of the few ice-free areas of Antarctica, mosses, lichens, and algae are found. Penguins populate Antarctic coastlines but do not exist in the Arctic. The land animals of the Arctic are foxes, bears, reindeer, and lemmings. These animals are unknown in the Antarctic. Old rock layers show that this "oppositeness" between north and south extends far back into the early chapters of earth history.
Ice is the great feature of Antarctica. More than 4.5 million square miles of ice sheet cover the area. Great rivers of ice, called glaciers, push down the mountains. Antarctica is the storehouse of about 85 percent of the total world supply of ice. 
The icecap is very thick, averaging nearly 8,000 feet. At one spot, scientists have found the distance from the surface to the rock underneath the ice to be more than 13,000 feet.
If this great volume of ice were to melt, the volume of the world oceans would increase, and sea level would rise. Extreme atmospheric changes would have to take place for this to happen.

Compared to the United States, Antarctica is _________.

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
An important point to remember if you like spending time out in the open air is that the human head doesn't work very well outdoors if it becomes too hot, cold or wet. That‟s why a hat is a  good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (16)       adequately in most conditions.
In cold climates, the problem is that the head is (17)           heat all the time. As much as fifty to sixty per cent of your body‟s heat is lost through the head and neck, (18)      on which scientist  you believe. Clearly this heat loss needs to be prevented, but it‟s important to remember that hats don‟t actually keep you warm, they simply stop heat escaping.
Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (19)       buying one that has a drop down tail at the back to stop your neck getting sunburnt.
And in wet weather  (20)         ,  hats are often more practical than  pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not.
(16)..........................