John will never buy you a drink - he's far too _____

Cho hỗn hợp hai ancol X, Y (M_X < M_Y) là đồng đẳng kế tiếp. Thực hiện hai thí nghiêm sau với cùng khối lượng của hỗn hợp.

Thí nghiệm 1: Cho hỗn hợp qua bột CuO dư nung nóng nhận thấy khối lượng chất rắn thu được có khối lượng giảm 4,8 gam so với khối lượng CuO ban đầu. Phần khí và hơi thoát ra (không có xeton) cho tác dụng hết với dung dịch AgNO₃/NH₃ dư thấy xuất hiện 90,72 gam kết tủa.

Thí nghiệm 2. Đun với dung dịch H₂SO₄ đặc ở 140⁰C thu được hỗn hợp 3 ete có tổng khối lượng 6,51 gam. Đem hóa hơi hỗn hợp 3 ete này thu được thể tích hơi đúng bằng thể tích của 2,94 gam nitơ (đo ở cùng điều kiện nhiệt độ và áp suất)

Biết các phản ứng ở thí nghiệm (1) xảy ra hoàn toàn. % chất Y chuyển hóa thành ete ở thí nghiệm (2) là:

Khi nhỏ từ từ đến dư dung dịch NaOH vào dung dịch hỗn hợp gồm AlCl3 và FeCl3, kết quả thí nghiệm được biểu diễn trên đồ thị sau:

Khi x = 0,66 thì giá trị của m (gam) là?

If the bride's father _____ the car for the wrong time, she _____ at the Church by now.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

The music was so loud that we had to shout to each other.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Johnny used to be one of the best athletes in my country.

The house was empty when I arrived. They ______.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

It is a pity that I can't speak English as native speaker.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

The passengers had to wait because the plane took off one hour late.

The little girl started crying. She _____ her doll, and no one was able to find it for her.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

She started working as a secretary 5 years ago.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

"I would like you not to play computer games any more, Amber" said her mother.

I didn't know you were asleep. Otherwise, I _____ so much noise when I came in.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

The car was so expensive that I didn’t buy it.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Some methods to prevent soil erosion are plowing parallel with the slope of hills, to plant trees on unproductive land, and rotating crops.

Cho các phát biểu sau:

(a) Thủy phân etyl axetat bằng NaOH đun nóng, thu được natri axetat và ancol etylic.

(b) Polietilen được điều chế bằng phản ứng trùng hợp.

(c) Thủy phân hoàn toàn protein đơn giản thu được hỗn hợp $\mathrm{\alpha }$-amino axit.

(d) Ở điều kiện thích hợp, triolein tham gia phản ứng cộng ${\mathrm{H}}_2$.

Số phát biểu đúng là:

Though _____ many centuries ago, the palace remains practically intact.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

They didn’t offer Ann the job.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Geothermal energy is energy to obtain by using heat from the Earth's interior.

Cho $f\left(x\right)=x^3-3x^2+1.$ Có bao nhiêu giá trị nguyên của m  để phương trình 2019.f(f(x)) = m  có 7 nghiệm phân biệt?

Cho từ từ dung dịch Ba(OH)₂ 1M đến dư vào 200 ml dung dịch chứa H₂SO₄ và Al₂(SO₄)₃ xM. Phản ứng được biểu diễn theo đồ thị sau:

Biết V₂/V₁ = 1,2. Giá trị của x là

Thủy phân đisaccarit X, thu được 2 monosaccarit Y, Z. Oxi hóa Y hoặc Z bằng dung dịch AgNO₃/NH₃, thu được chất hữu cơ T. Hai chất X, T lần lượt là:

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.

        Any list of the greatest thinkers in history contains the name of the brilliant physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers.

        The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe.

        The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = mc², known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas.

        He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D.Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.

What did Einstein propose in the theory of light?

Christmas Eve is _____ best time for Japanese youngsters to go out for _____ special, romantic evening.

"Would you like to have coffee, lemonade, or something different?"

Cindy: "________________ ".

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Publishing in the UK. the book has won a number of awards in recent regional book fairs.

_____ noodles are a precooked and usually dried block invented by Japanese.

Nhỏ V lít dung dịch NaOH 1M vào dung dịch chứa HCl 0,8M và $AlC{l}_3$  x M. Đồ thị mô tả sự phụ thuộc của lượng kết tủa vào thể tích dung dịch NaOH được biểu diễn như sau:

Giá trị của x tương ứng là:

Simon: "Do you mind if I use your phone?"

Durex: "________________ "

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.

        Any list of the greatest thinkers in history contains the name of the brilliant physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers.

        The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe.

        The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = mc², known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas.

        He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D.Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.

According to the passage, Einstein supported all of the following except_______.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a peaceful scene that electric light just cannot match.

Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.

In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle-making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.

Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.

For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle-making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects - some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.

Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.

Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

Question 42: Which of the following best expresses the main idea of this passage?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 39 to 43

Someone once has said that there are three kinds of people who are interested in sport: People who (39)_______ part, people who watch, and people who watch (40)_______ television. It’s very easy to make fun of stay-at-home sports fans but on the other hand, television does enable us to enjoy all kinds of (41)_______ events. We can watch a racing car overtake another, see a cyclist cross the finishing line, or enjoy the goals of our favorite football (42)_______ The first time I watched a tennis match was on television, and I found it unexpectedly interesting. It’s not always easy to travel long distance to football grounds and television is a good solution. Of course, you can (43)_______ used to sitting indoors all the time, and this is dangerous. We should all try to keep fit, and have other interests and pastimes

Điền vào ô số 43

Befriending can offer volunteers the opportunity to provide support and friendship to a person who may be going _____ a difficult period.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 39 to 43

Someone once has said that there are three kinds of people who are interested in sport: People who (39)_______ part, people who watch, and people who watch (40)_______ television. It’s very easy to make fun of stay-at-home sports fans but on the other hand, television does enable us to enjoy all kinds of (41)_______ events. We can watch a racing car overtake another, see a cyclist cross the finishing line, or enjoy the goals of our favorite football (42)_______ The first time I watched a tennis match was on television, and I found it unexpectedly interesting. It’s not always easy to travel long distance to football grounds and television is a good solution. Of course, you can (43)_______ used to sitting indoors all the time, and this is dangerous. We should all try to keep fit, and have other interests and pastimes

Điền vào ô số 42

Cho hàm số y=f(x) liên tục trên $\mathrm{ℝ}$ và có đồ thị như hình bên dưới

Có bao nhiêu số nguyên m để phương trình $f\left(x{\left(x-3\right)}^2\right)=m$ có 9 nghiệm thực thuộc đoạn [0;4]?

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.

        Any list of the greatest thinkers in history contains the name of the brilliant physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers.

        The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe.

        The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = mc², known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas.

        He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D.Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.

Which of the following inventions is mentioned in the passage as a practical application of Einstein's discoveries?

Dung dịch X chứa a mol ZnSO₄; dung dịch Y chứa b mol AlCl₃; dung dịch Z chứa c mol NaOH. Tiến hành 2 thí nghiệm sau:

- Thí nghiệm 1: Cho từ từ dung dịch Z vào dung dịch X;

- Thí nghiệm 2: Cho từ từ dung dịch Z vào dung dịch Y.

Lượng kết tủa ở 2 thí nghiệm biến đổi theo đồ thị sau đây:

Tổng khối lượng kết tủa ở 2 thí nghiệm khi dùng x mol NaOH gần nhất với giá trị nào sau đây?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 39 to 43

Someone once has said that there are three kinds of people who are interested in sport: People who (39)_______ part, people who watch, and people who watch (40)_______ television. It’s very easy to make fun of stay-at-home sports fans but on the other hand, television does enable us to enjoy all kinds of (41)_______ events. We can watch a racing car overtake another, see a cyclist cross the finishing line, or enjoy the goals of our favorite football (42)_______ The first time I watched a tennis match was on television, and I found it unexpectedly interesting. It’s not always easy to travel long distance to football grounds and television is a good solution. Of course, you can (43)_______ used to sitting indoors all the time, and this is dangerous. We should all try to keep fit, and have other interests and pastimes

Điền vào ô số 41

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a peaceful scene that electric light just cannot match.

Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.

In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle-making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.

Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.

For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle-making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects - some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.

Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.

Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

Question 41: What dose the passage warn readers not to do?

Cho 3,36 gam Fe và 5,12 gam Cu vào 200 ml dung dịch ${\mathrm{AgNO}}_3$1M. Sau khi các phản ứng xảy ra hoàn toàn, thu được m gam kim loại. Giá trị của m là

X và Y là hai cacbohiđrat. X là chất rắn, tinh thể không màu, dễ tan trong nước, có vị ngọt nhưng không ngọt bằng đường mía. Y là chất rắn ở dạng sợi, màu trắng, không có mùi vị. Tên gọi của X, Y lần lượt là:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 39 to 43

Someone once has said that there are three kinds of people who are interested in sport: People who (39)_______ part, people who watch, and people who watch (40)_______ television. It’s very easy to make fun of stay-at-home sports fans but on the other hand, television does enable us to enjoy all kinds of (41)_______ events. We can watch a racing car overtake another, see a cyclist cross the finishing line, or enjoy the goals of our favorite football (42)_______ The first time I watched a tennis match was on television, and I found it unexpectedly interesting. It’s not always easy to travel long distance to football grounds and television is a good solution. Of course, you can (43)_______ used to sitting indoors all the time, and this is dangerous. We should all try to keep fit, and have other interests and pastimes

Điền vào ô số 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.

        Any list of the greatest thinkers in history contains the name of the brilliant physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers.

        The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe.

        The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = mc², known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas.

        He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D.Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.

Einstein's primary work was in the area of_________.

We expect Linh _____ to the airport late as the plane will take off in 15 minutes.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a peaceful scene that electric light just cannot match.

Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.

In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle-making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.

Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.

For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle-making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects - some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.

Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.

Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

Question 40: According to the text, what is needed to succeed at candle-making?

X và Y là hai cacbohiđrat. X là chất rắn, ở dạng bột vô định hình, màu trắng, không tan trong nước lạnh. Y là loại đường phổ biến nhất, có trong nhiều loài thực vật, có nhiều nhất trong cây mía, củ cải đường và hoa thốt nốt. Tên gọi của X, Y lần lượt là:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 39 to 43

Someone once has said that there are three kinds of people who are interested in sport: People who (39)_______ part, people who watch, and people who watch (40)_______ television. It’s very easy to make fun of stay-at-home sports fans but on the other hand, television does enable us to enjoy all kinds of (41)_______ events. We can watch a racing car overtake another, see a cyclist cross the finishing line, or enjoy the goals of our favorite football (42)_______ The first time I watched a tennis match was on television, and I found it unexpectedly interesting. It’s not always easy to travel long distance to football grounds and television is a good solution. Of course, you can (43)_______ used to sitting indoors all the time, and this is dangerous. We should all try to keep fit, and have other interests and pastimes

Điền vào ô số 39

Thủy phân đisaccarit X, thu được 2 monosaccarit Y, Z. Oxi hóa Y hoặc Z bằng dung dịch AgNO₃/NH₃, thu được chất hữu cơ T. Hai chất Y, Z lần lượt là:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Thanks to electricity, candles are no longer a necessity in our lives, but they are still a pleasure. The warm flame of candlelight can quickly alter the mood and atmosphere of a room, often creating a peaceful scene that electric light just cannot match.

Candles are an important part of many cultural and religious festival and have been burnt in various forms for centuries. The ancient Romans and Egyptians made candles from a type of fiber coated with wax. However, up until the nineteenth century, most candles were made from a substance called tallow, obtained from beef fat. Tallow candles were very smoky and, understandably, had an unpleasant odor.

In the 19th century, candle makers learned to separate stearin, the solid form fat used as a type of glue, from tallow and used it to harden other fats. Candles that contained stearin would burn longer than previous ones and had a better smell. Stearin is still one of the main components of modern candle-making, and the techniques used to create candles today are much the same as they have been for many years. These days, the increase range of wax dyes, perfumes and other additives that are now available make candle making a very exciting and rewarding hobby.

Sales of candles have increased greatly over the last few years, showing that they have become part of our lives again, not through necessity, but because of the magical atmosphere they create. In our increasingly stressful lives, the calming quality of candlelight has a relaxing effect that many enjoy.

For those would like to learn to make candles, finding and buying candle-making kits is easy. Candle-making is definitely enhanced by the exciting possibilities of experimentation with various materials. Be brave and try out different effects - some of the most wonderful creations can happen by accident. With a bit of practice, you will be amazed at the very professional finish that can be achieved.

Despite their delicate beauty, candles can, of course, be highly dangerous. One should never leave lit candles unattended, even for a few moments. Always make sure candles are securely placed within candleholders.

Teach your children to respect a burning candle, and of course keep burning candles away from flammable materials. Keep your home safe by remembering that a candle is magical, but fire can be very destructive. Be careful, and enjoy the beauty of your candles!

Question 39: According to the text, what does the increase of candle sales illustrate?

After marriage, Mrs. Hoa always keeps a good _____ with her mother-in-law.