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.
(5)..........................

Read the following pasage and decide which answer (A, B, C or D) best fits each space from 1 to 5.
With job vacancies available all year round offering high salaries, Vietnam has been ranked the second best place in the world to teach English by TEFL Exchange, a community for teachers of English           (1)_________ a foreign language.
The site (2)_________ that a foreign English teacher can earn between $1,200-2,200 a month in Vietnam, where the average annual income in 2016 was just $2,200. They can (3)_________ a job any time of year and the best places to do so are the country’s three largest cities: Hanoi, Ho Chi Minh City and Da Nang.
Candidates only need to hold a bachelor’s (4)_________ and a TEFL  (Teaching  English as a Foreign Language) certificate.
English is an obligatory subject from sixth grade across Vietnam, but in large cities, many primary schools demand high (5)_________ . Foreign language centers have been thriving here, with students as young as three years old.
(3)...................

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 generation gap that was so in evidence during the 60s has resurfaced, but it is not the disruptive force that it was during the Vietnam era, a 2009 study suggests. The Pew Research Center study found that 79% of Americans see major differences between younger and older adults in the way they look at the world. In 1969, a Gallup Poll found that a smaller percentage, 74%, perceived major differences.
     Today, however, although more Americans see generational differences, most do not see them as divisive. That is partly because of the areas of difference. The top areas of disagreement between young and old, according to the Pew Research Study, are the use of technology and taste in music. Grandparents are likely to have observed these differences in their grandchildren who are tweens, teens, and young adults.
     If large differences between the generations exist, why don't they spawn conflict? The answer is twofold.
     First, the two largest areas of difference—technology and music—are less emotionally charged than political issues. The older generation is likely to be proud of the younger generation's prowess in technology rather than to view it as a problem. As for the musical differences, each generation wants its own style of music, and the older generation generally can relate to that desire.
     Second, in the other areas of difference, the younger generation tends to regard the older generation as superior to their own generation—clearly a difference from the 1960s with its rallying cry of "Don't trust anyone over thirty." According to the Pew study, all generations regard older Americans as superior in moral values, work ethic and respect for others.

Which of the following could be the main idea of the passage?

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.

(34)________

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

A scientist said robots will be more intelligent than humans by 2029. The scientist's name is Ray Kurzweil. He works for Google as Director of Engineering. He is one of the world's (1)______ experts on artificial intelligence (A.I.). Mr Kurzweil believes computers will be able to learn from experiences, just like humans. He also thinks they will be able to tell jokes and stories, and even flirt. Kurzweil's 2029 prediction is (2)______ sooner than many people thought. The scientist said that in 1999, many A.I. experts said it would be hundreds of years before a computer was more intelligent than a human. He said that it would not be long before computer intelligence is one billion times more powerful than the human brain.

Mr Kurzweil joked that many years ago, people thought he was a little crazy (3)______ predicting computers would be as intelligent as humans. His thinking has (4)______ the same but everyone else has changed the way they think. He said: "My views are not radical any more. I've actually stayed consistent. It's the (5)______ of the world that's changing its view." He highlighted examples of high-tech things we use, see or read about every day. These things make us believe that computers have intelligence. He said people think differently now: "Because the public has seen things like Siri [the iPhone's voice-recognition technology] where you talk to a computer; they've seen the Google self-driving cars."

(5) ______

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.

(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 countryside of Britain is well known for its beauty and many contrasts: its bare mountains and moorland, its lakes, rivers and woods, and its long, often wild coastline. Many of the most beautiful areas are national parks and are protected from development. When British people think of the countryside they think of farmland, as well as open spaces. They imagine cows or sheep in green fields enclosed by hedges or stone walls, and fields of wheat and barley. Most farmland is privately owned but is crossed by a network of public footpaths.

   Many people associate the countryside with peace and relaxation. They spend their free time walking or cycling there, or go to the country for a picnic or a pub lunch. In summer people go to fruit farms and pick strawberries and other fruit. Only a few people who live in the country work on farms. Many commute to work in towns. Many others dream of living in the country, where they believe they would have a better and healthier lifestyle.

   The countryside faces many threats. Some are associated with modern farming practices, and the use of chemicals harmful to plants and wildlife. Land is also needed for new houses. The green belt, an area of land around many cities, is under increasing pressure. Plans to build new roads are strongly opposed by organizations trying to protect the countryside. Protesters set up camps to prevent, or at least delay, the building work.

   America has many areas of wild and beautiful scenery, and there are many areas, especially in the West in states like Montana and Wyoming, where few people live. In the New England states, such as Vermont and New Hampshire, it is common to see small farms surrounded by hills and green areas. In Ohio, Indiana, Illinois and other Midwestern states, fields of corn or wheat reach to the horizon and there are many miles between towns.

   Only about 20% of Americans live outside cities and towns. Life may be difficult for people who live in the country. Services like hospitals and schools may be further away and going shopping can mean driving long distances. Some people even have to drive from their homes to the main road where their mail is left in a box. In spite of the disadvantages, many people who live in the country say that they like the safe, clean, attractive environment. But their children often move to a town or city as soon as they can.

   As in Britain, Americans like to go out to the country at weekends. Some people go on camping or fishing trips, others go hiking in national parks.

What does the word “they” in paragraph 2 refer to?

Read the passage below and decide whether the statements are TRUE or FALSE?

When a child learns to read and write, he must access the schema developed in his brain. As he reads, the child creates pictures in his mind and uses imagination and points of reference to put the story together. Television images do not go through a complex symbolic transformation. The mind does not have to decode and manipulate during the television experience. Watching television and playing video games do not develop a child's skills in word recognition, decoding, vocabulary, spelling or high-level thinking. The connection between television's effects on children's reading abilities and the decline in their writing skills is clear: there is no question in the minds of educators that a student who cannot read with the true comprehension will never learn to write well. Writing, after all, is book talk, and you only learn book talk by reading. It has been shown that reading stimulates brain activity. While reading, we imagine settings, characters and we become part of the world of the story. Conversely, it has been shown that watching television prevents brain activity. Children who watch too much television are less socially developed and have problems maintaining concentration. Reading, instead of watching television, enriches our lives, develops the imagination, and intellect, and is less brain deadening. Reading is good for us, it makes one a better person.

Scientists suggest that a child should watch television to enrich our lives, boost imagination, and intellect.

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. 

17....................

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 countryside of Britain is well known for its beauty and many contrasts: its bare mountains and moorland, its lakes, rivers and woods, and its long, often wild coastline. Many of the most beautiful areas are national parks and are protected from development. When British people think of the countryside they think of farmland, as well as open spaces. They imagine cows or sheep in green fields enclosed by hedges or stone walls, and fields of wheat and barley. Most farmland is privately owned but is crossed by a network of public footpaths.

   Many people associate the countryside with peace and relaxation. They spend their free time walking or cycling there, or go to the country for a picnic or a pub lunch. In summer people go to fruit farms and pick strawberries and other fruit. Only a few people who live in the country work on farms. Many commute to work in towns. Many others dream of living in the country, where they believe they would have a better and healthier lifestyle.

   The countryside faces many threats. Some are associated with modern farming practices, and the use of chemicals harmful to plants and wildlife. Land is also needed for new houses. The green belt, an area of land around many cities, is under increasing pressure. Plans to build new roads are strongly opposed by organizations trying to protect the countryside. Protesters set up camps to prevent, or at least delay, the building work.

   America has many areas of wild and beautiful scenery, and there are many areas, especially in the West in states like Montana and Wyoming, where few people live. In the New England states, such as Vermont and New Hampshire, it is common to see small farms surrounded by hills and green areas. In Ohio, Indiana, Illinois and other Midwestern states, fields of corn or wheat reach to the horizon and there are many miles between towns.

   Only about 20% of Americans live outside cities and towns. Life may be difficult for people who live in the country. Services like hospitals and schools may be further away and going shopping can mean driving long distances. Some people even have to drive from their homes to the main road where their mail is left in a box. In spite of the disadvantages, many people who live in the country say that they like the safe, clean, attractive environment. But their children often move to a town or city as soon as they can.

   As in Britain, Americans like to go out to the country at weekends. Some people go on camping or fishing trips, others go hiking in national parks.

Which of the following threatens the countryside in Britain?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word(s) for each of the blanks.

The relationship between students and teachers is less formal in the USA than in many other countries. American students do not stand up when their teachers (1) _______the room. Students are encouraged to ask questions during class, to stop in the teacher’s office for extra help, and to phone if they are absent. Most teachers (2) _________ students to enter class late or leave early if necessary. (3) ______the lack of formality, students are still expected to be polite to their teachers and classmates.

When students want to ask questions, they usually (4) _______ a hand and wait to be called on. When a test is being given, talking to a classmate is not only rude but also risky. Most American teachers consider that students who are talking to each other (5) _______ a test are cheating.

(3) _________

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)

According to paragraph 2, the author _____.

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.

All living things require energy to do the work necessary for survival and reproduction. But what is energy? Energy is simply the ability to do work, (1) ......... work is done when a force moves an object. Let's consider your own needs for a moment. You need energy to turn on and turn off your computer. You need energy to (2).......... of bed in the morning. And, yes, you need energy to reproduce. So where does energy come from and how do we use it? On Earth, energy ultimately comes from the sun. Plants use the sun's energy to make sugar. Organisms, in turn, use sugar as a (3) ........... of energy to do work.

Plants use energy from sunlight to make sugar and oxygen from carbon dioxide and water. The process by which carbon dioxide and water are (4) .......... to sugar and oxygen using sunlight is referred to as photosynthesis. This is an endergonic reaction, meaning energy is required by the reaction. Specifically, energy is required to put the carbon dioxide and the water molecules together to form sugar. Sun (5).........the energy needed to drive photosynthesis, and some of the energy used to make the sugar is stored in the sugar molecule.

(study.com/energy-and-life-the–transformation-of-energy-in-living)

(4) __________

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.
(33).....................

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 41 to 45.
SOCIAL NETWORK
A 16-year-old girl from Essex has been sacked after describing her job as boring on the social networking website, Facebook. The teenager, who had been working (41)      an administrative assistant at a    marketing company for just three weeks, didn‟t feel very enthusiastic about the duties she was asked to do. (42)       of moaning to her friends she decided to express her thoughts on her Facebook page to a colleague, who (43)       the boss‟s attention to it. He immediately fired her on the (44)       that her public display of dissatisfaction made it impossible for her to continue working for the company. She later told newspapers she had been treated totally unfairly, especially as she hadn‟t even mentioned the company‟s name. She claimed she‟s been perfectly happy with her job and that her light-hearted comments shouldn‟t (45)      taken seriously. A spokesperson from a workers‟ union said the incident demonstrated two things: firstly, that people need to protect their privacy online and secondly, that employers should be less sensitive to criticism.
(41).......................

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks from 36 to 40.
Vietnamese generally shake hands when greeting and parting. Using both hands shows respect as does a (36)_________ bow of the head. In rural areas, elderly people who do not extend their hand are greeted with a slight bow. Women are more likely to bow the head than to shake hands. Vietnamese names begin with the family name andare (37)_________ by a given name. People address one another by their given names,    but add a title that indicates their perceived relationship to the other person. These titles are family related rather than professional. Among colleagues, for example, the younger of the two might combine the given name with the title of - Anh(OlderBrother). A/n (38)_________ greeting combined with the given name and titleis “Xin chao” (Hello). Classifiers for gender and familiarity are also combined with the greeting. In formal meetings, business cards are sometimes exchanged on greeting.
Vietnamese have astrong (39)_________ of hospitality and feel embarrassed if they cannot show their guests  full respect by preparing for their arrival. Therefore, it is (40)_________ to visit someone without having been invited. Gifts are not required, but are appreciated. Flowers, incense, or tea may be appropriate gifts for the hosts. Hosts also appreciate a small gift for their children or elderly parents.
(40).................

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.

Which statement is NOT true, according to the passage?

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. 

9)..........................

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.
Hospitality
Hospitality - looking after visitors - is universal but in different cultures hostsare (1)       to receive guests in different ways.
In much of the ancient world it was the custom to provide passing travellers with food and water. Today some old customs have (2)      . In a traditional Japanese household, if a guest admires a particular object in the house, the host will want to give it to the guest straight away. And in parts of Russia guests are greeted with bread and salt on a special cloth.The guest is (3)        to kiss them and hand them back to the host. Sometimes the guest breaks off a small piece of bread, dips it in the salt and eats it.
In some countries, when foreign guests arrive from abroad, they may feel they have been given a particularly (4)        meal. But this is probably because the host politely offers more and more food and drink and the guest is too embarrassed to (5)      anything down.
(2)....................

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.
(35).....................

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

Books which give instructions on how to do things are very popular in the United States today. Thousands of these How-to books are useful: in fact, there are about four thousand books with titles that begin with the words 'How-to". One book may tell you how to earn more money, another may tell you how to save or spend it and another may explain how to give your money away. Many How-to books give advice on careers. They tell you how to choose a career and how to succeed in it. If you fail, however, you can buy the book “How to Turn Failure into Success”. If you would like to become very rich, you can buy the book “How to Make a Millionaire”. If you never make any money at all. you may need abook called “How to Live on Nothing”. One of the most popular types of books is one that helps you with personal problems. If you want to have a better love of life, you can read “How to Succeed in Love Every Minute of Your Life”. If you are tired of books on happiness,  you may prefer books which give step-by-step instructions on how to redecorate or enlarge a house. Why have How-to books become so popular? Probably because life has become so complex. Today people have far more time to use, more choices to make, and more problems to solve. How-to books help people deal with modern life.

The passage tells us that How-to books sell well on how________