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4 tháng 7 2017

saving energy được không bạn ?

28 tháng 4 2017

Traveling in the Future

These days, if you want to travel from New York to Beijing, the flight takes about 16 hours. You also have to wait at the airport, and sometimes you have to transfer onto a different airplane. If you add all of that extra time, the trip takes at least 20 hours. But in the future, the trip from New York to Beijing might only take two hours.

Right now, a private company is developing something called ET3. ET3 stands for “evacuated tube transport technology”. Here is how it works. A tube goes all the way from New York to Beijing. The tube is only a few meters wide. Capsules move through the tube. Six people can sit in one capsule. The capsules use electricity instead of gasoline. For international travel, the capsules can travel at about 6,500 kilometers per hour. That is much faster than airplane - most modern airplanes usually only fly at about 800 kilometers per hour.

So how is this possible? How can these capsules travel so fast? The answer is that there is no air inside the tube. When airplanes fly, they have to move through the air. The air slows the airplanes down. Because there is no air in the ET3 tubes, the capsules are able to move at a very high speed. Besides, the capsules are quite light. They only weigh 183 kilograms.

There are other advantages to ET3. Because it uses electricity, it is quite clean. In addition, it is much quieter than airplanes and cars. Finally, ET3 tubes and capsules don’t require very much building material.

Of course, ET3 doesn’t exist yet. The technology is still being developed. Developers still have to solve a lot of problems. The biggest problem is that right now, ET3 would be far too expensive. In order to make ET3 cheaper, we will need much better technology.

It is exciting to think of how ET3 will change travel in the future. Maybe someday, you will be able to have lunch in New York and dinner in Beijing.

I. Rewrite the sentences with the same meaning. (Viêt lại câu sao cho nghĩa của câu không đổi ) 1 The distance from Ha Noi to Thanh Hoa City is about 100 kilometres. → It is about 2 Although Quang Hai -footballer is so young, he plays football beautifully. Despite 3.My father lived in small village when he was a child. → My father used to 4. What is the dıstance between Thanh Hoa and Ha Noi city? How far 5. I often walked to school when I was a student I used. 6. In spite of...
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I. Rewrite the sentences with the same meaning. (Viêt lại câu sao cho nghĩa của câu không đổi ) 1 The distance from Ha Noi to Thanh Hoa City is about 100 kilometres.

→ It is about

2 Although Quang Hai -footballer is so young, he plays football beautifully.

Despite

3.My father lived in small village when he was a child.

→ My father used to 4.

What is the dıstance between Thanh Hoa and Ha Noi city?

How far

5. I often walked to school when I was a student

I used.

6. In spite of being so young, Tien Dung goalkeeper performs excellently.

→Although..

7. What is the distance between Vinh and Ha Noi city?

→ How

8 I often walked to school when I was a student.

I used..

9. Although they are short, they still love playing sports.

→ In spite of...

10. We will use less electricity in the future

Less electricity

II. Change the sentences into the passive voice. (Chuyên các câu sau sang câu bị đông)

1. We will use less electricity in the future.

Less electricity

2 The students in my school will use public transport when travelling long distances

. Public transport.

3.1 will turn off the lights when leaving a room or going to bed

The lights...

4. Wind power will offer a great deal of energy next century.

A great deal of energy

5. We will use sources of energy more effectively for our future

. Sources of energy

6 People in the countryside will increase the use of biogas for cooking.

The use of biogas

7. They will build a bydropower station in the North of the country next decade,

A hydropower station 8.

We will solve the problem of energy shortage by tsing solar energy.

he problem of energy shortage

1
4 tháng 2 2020

I. Rewrite the sentences with the same meaning. (Viêt lại câu sao cho nghĩa của câu không đổi )

1 The distance from Ha Noi to Thanh Hoa City is about 100 kilometres.

→ It is about 100 kilometers from Ha Noi to Thanh Hoa City

2 Although Quang Hai -footballer is so young, he plays football beautifully.

Despite being so young, Quang Hai plays football beautifully

Or :

Despite the fact that Quang Hai is so young, he plays football beautifully

3.My father lived in small village when he was a child.

→ My father used to live in small village when he was a child

4. What is the dıstance between Thanh Hoa and Ha Noi city?

How far is it from Thanh Hoa to Ha Noi City?

5. I often walked to school when I was a student

I used. to walk to school when I was a student

6. In spite of being so young, Tien Dung goalkeeper performs excellently.

→Although.. Tien Dung goalkeeper is so young, he performs excellently

7. What is the distance between Vinh and Ha Noi city?

→ How far is it from Vinh to Ha Noi city?

8 I often walked to school when I was a student.

I used.. to walk to school/ go to school on foot when I was a student

9. Although they are short, they still love playing sports.

→ In spite of... being short, they still love playing sports.

Or :

In spite of their shortness, they still love playing sports.

Or:

In spite of thte fact that they are short, they still love playing sports

10. We will use less electricity in the future

Less electricity will be used by us in the future

II. Change the sentences into the passive voice. (Chuyên các câu sau sang câu bị đông)

1. We will use less electricity in the future.

Less electricity will be used ( by us) in the future

2 The students in my school will use public transport when travelling long distances

. Public transport. will be used by the students in my school when travelling along distances.

3.1 will turn off the lights when leaving a room or going to bed

The lights... will be turned off by me when I leave a room or go to bed

4. Wind power will offer a great deal of energy next century.

A great deal of energy will be offered by wind power next century

5. We will use sources of energy more effectively for our future

. Sources of energy will be used more effectively for our future

6 People in the countryside will increase the use of biogas for cooking.

The use of biogas for cooking will be increased by people in the countryside

7. They will build a bydropower station in the North of the country next decade,

A hydropower station will be built in the North of the country next decade

8.We will solve the problem of energy shortage by tsing solar energy.

The problem of energy shortage will be solved by using solar energy

4 tháng 2 2020

❤cảm ơn bạn nháTEST YOURSELF 1

recycling/ nothing/ list/ vegetables/ something/ save/ trouble/ polluting/ taking. Our environment is in (1) ______. Modern ways of living and today’s industries are (2) ______ it. Most people think there is (3) ______ they can do. This is not true. Everyone can do something to help (4) ______ our environment. Here is a (5) ______ of things you can do. Help to cut pollution by (6) ______ the bus to work instead of your car. Buy fruit and (7) ______ that have not been treated...
Đọc tiếp
recycling/ nothing/ list/ vegetables/ something/ save/ trouble/ polluting/ taking. Our environment is in (1) ______. Modern ways of living and today’s industries are (2) ______ it. Most people think there is (3) ______ they can do. This is not true. Everyone can do something to help (4) ______ our environment. Here is a (5) ______ of things you can do.
    • Help to cut pollution by (6) ______ the bus to work instead of your car.
    • Buy fruit and (7) ______ that have not been treated with pesticides.
    • Recycle all your cans, bottles and paper. There should be a (8) ______ center somewhere near your home, so take them there.
Most of the world’s energy comes from the sun. The sun’s energy is in wood, oil, and other things that people use for energy. VI. Read the text then answer true or false People use many sources of energy. Ancient people used only their arms, hands, and simple tools until they discovered fire. Later, people learned to use the energy of the wind to sail ships. Then they learned to use animals to do work. In the eighteenth and nineteenth centuries, people began to use machines. The first machines used steam. They burned coal to heat water. The hot water turned into steam, and the steam engine did the work. Later, people began to use the gasoline engine, and today people are using nuclear energy. Energy is one of the basic concepts, or ideas, of physics. It is the ability to do work. Without energy we could live. We need energy to work, and scientists are always looking for new sources of energy. 1. None of the world’s energy comes from the sun. 2. Wind, steam, and gasoline are sources of energy. 3. People have never used nuclear energy. 4. Energy is the ability to do work. 5. We need new sources of energy.
2
9 tháng 4 2018

recycling/ nothing/ list/ vegetables/ something/ save/ trouble/ polluting/ taking. Our environment is in (1)trouble. Modern ways of living and today’s industries are (2)polluting it. Most people think there is (3) nothing they can do. This is not true. Everyone can do something to help (4) save our environment. Here is a (5)list of things you can do.

    • Help to cut pollution by (6)taking the bus to work instead of your car.
    • Buy fruit and (7) vegetables that have not been treated with pesticides.
    • Recycle all your cans, bottles and paper. There should be a (8) recycling center somewhere near your home, so take them there.
9 tháng 4 2018

Our environment is in trouble. Modern ways of living and today’s industries are polluting it. Most people think there is nothing they can do. This is not true. Everyone can do something to help save our environment. Here is a list of things you can do.
- Help to cut pollution by taking the bus to work instead of your car.
- Buy fruit and vegetables that have not been treated with pesticides.
- Recycle all your cans, bottles and paper. There should be a recycling center somewhere near your home, so take them there.

Most of the world’s energy comes from the sun. The sun’s energy is in wood, oil, and other things that people use for energy.

VI. Read the text then answer true or false

People use many sources of energy. Ancient people used only their arms, hands, and simple tools until they discovered fire. Later, people learned to use the energy of the wind to sail ships. Then they learned to use animals to do work. In the eighteenth and nineteenth centuries, people began to use machines. The first machines used steam. They burned coal to heat water. The hot water turned into steam, and the steam engine did the work. Later, people began to use the gasoline engine, and today people are using nuclear energy. Energy is one of the basic concepts, or ideas, of physics. It is the ability to do work. Without energy we could live. We need energy to work, and scientists are always looking for new sources of energy.

1. None of the world’s energy comes from the sun. F

2. Wind, steam, and gasoline are sources of energy. T

3. People have never used nuclear energy. F

4. Energy is the ability to do work. T

5. We need new sources of energy. T

Part 3: Read the following sentences about the different forms of energy available. Match the sentences in Part One with correct sentences in Part Two.  (10 points)PART ONE0. Muscles and wood were the first sources of energy used by early man.1. Coal made the Industrial Revolution in the nineteenth century possible.2. Today we depend on oil more than any other fuels.3. Gas is considered as a “mineral” because, together with coal, it is part of the earth’s crust.4. Hydroelectric power is used to...
Đọc tiếp

Part 3: Read the following sentences about the different forms of energy available. Match the sentences in Part One with correct sentences in Part Two.  (10 points)

PART ONE

0. Muscles and wood were the first sources of energy used by early man.

1. Coal made the Industrial Revolution in the nineteenth century possible.

2. Today we depend on oil more than any other fuels.

3. Gas is considered as a “mineral” because, together with coal, it is part of the earth’s crust.

4. Hydroelectric power is used to produce electricity.

5. Geothermal energy is produced from the heat stored in the earth’s core.

6. The wind was used as a power source over 1,300 years ago in Persia when the first windmill was built to return a millstone.

7. Waves have enormous power.

8. Incoming tides can be trapped behind a dam across a bay or an estuary.

9. A huge amount of solar energy reaches the earth’s outer atmosphere.

10. Nuclear fuels, such as uranium-235 and plutonium, can be made to produce immense heat by a process called “fission”.

PART TWO

a. Like oil, it is a fossil fuel and is thus a non-renewable source of energy.

b. One danger, however, is in getting rid of the radioactive wastes which are produced.

c. They increase and decrease more slowly than the wind, thus making them easier to use as a source of energy.

d. It was the first fossil fuel to be used to power machinery.

e. However, it is thinly spread, and collecting it in countries like Britain and northern Europe is still difficult and expensive.

f. It is used as a fuel in cars, ships and aeroplanes, and even in rockets.

g. It is produced by the fall of water trapped in a dam.

h. It took thousands of years to progress to using coal on a large scale.

I.This internal heat helps to produce geysers and steam springs and can be used to generate eletricity in countries like New Zealand.

j. The water is then allowed to flow out past water wheels as the tide goes out.

k. For morden purposes, however, it is necessary to build a machine which can store the energy obtained for use on calm days.

Example:             0 – H

1........                   2. .......                  3.........                  4.........                  5........

                                                                6……                       7…….                      8….…                      9…….                      10…..

0
15 tháng 11 2019

.

Talk about the type of transport that you prefer for travelling long distances.

I prefer public mode of transportation and I’d choose trains, buses, and bicycles. Renting a bike is the best option in crowded cities. You also have buses, trains. Being a traveler, I am always looking for ways to save money. And taking trains and buses are the best ways to save money to save money on your travels. Plus, you also get to meet the locals and you have a great chance to be friends with them and learn about their culture. Locals can also tell you about the places that are not much explored.

Moreover, if you travel during nights, you are going to save even more. This is the reason I prefer buses and trains (public transportation

Talk about the your bad travel experiences.

(Bạn tự viết nhé!hihi)

“My Flight Was Overbooked, And I Got Bumped To A Later One.”

“My Hotel Was In A Really Seedy Area.”

“I Was Mugged While Walking In The City Center – In Broad Daylight!”

“The Weather Was Miserable – The Rain Didn’t Let Up For A Minute.”

“We Forgot To Bring Bug Spray And Got Completely Bitten Up.”

“I Ended Up With Huge Blisters After Our Walking Tour Of The City.”

“Something I Ate Didn’t Agree With Me, And I Got The Runs.”

“I Bought A T-Shirt, But It Was A Total Rip-Off.”

“The Place Was Nothing But A Tourist Trap.”

“I Was Hung Over On The Last Day Of My Trip.”

“I Had To Catch The Red-Eye In Order To Get Back In Time For Work On Monday Morning.”

Check True or False Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, give light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal and natural gas. However, burning fossil fuels causes pollution. Also, if we don’t find new kinds of energy, we will use up all the fossil fuels in the twenty –first century. Scientists are working to find other kinds of energy for the...
Đọc tiếp

Check True or False

Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, give light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal and natural gas. However, burning fossil fuels causes pollution. Also, if we don’t find new kinds of energy, we will use up all the fossil fuels in the twenty –first century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

____ 29/ Energy is used to produce a lot of electrical things.

____ 30/ Energy comes from natural resources.

____ 31/ burning fossil fuels causes pollution.

____ 32/ Everyone tries their best to find other kinds of energy for the future.

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/Chi didn’t drink anything. She was very thirsty.

-->Although ____________________________________________________

34/ Don’t forget to buy me a newspaper.

->Remember ___________________________________________________

35/ I suggest that we should have a mechanic check our motorbike once a month.

--> I suggest _____________________________________________________

36/The film Titanic is on at Rex Cinema. Have you seen it?

--> Have you _____________________________________________________

1
9 tháng 1 2018

Check True or False

Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, give light, transport people and products from place to place. Most energy nowadays comes from fossil fuels such as petroleum, coal and natural gas. However, burning fossil fuels causes pollution. Also, if we don’t find new kinds of energy, we will use up all the fossil fuels in the twenty –first century. Scientists are working to find other kinds of energy for the future. What might these sources of energy be?

__T__ 29/ Energy is used to produce a lot of electrical things.

__F__ 30/ Energy comes from natural resources.

_T___ 31/ burning fossil fuels causes pollution.

__T__ 32/ Everyone tries their best to find other kinds of energy for the future.

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/Chi didn’t drink anything. She was very thirsty.

-->Although ___Chi was very thirsty ,she didn’t drink anything__

34/ Don’t forget to buy me a newspaper.

->Remember ________ to buy me a newspaper._______

35/ I suggest that we should have a mechanic check our motorbike once a month.

--> I suggest _having a mechanic check our motorbike once a month

36/The film Titanic is on at Rex Cinema. Have you seen it?

--> Have you ________seen the film Titanic on at Rex Cinema____

II/ Read the text and choose the best answers A, B, C or D. to the questions. (1m) Most of the countries in the world have searched for alternative sources of energy in various directions. Many communities are burning garbage and other biological waste products to produce electricity. Converting waste products to gases or oil is also an efficient way to dispose of waste. Experimental work is being done to derive synthetic fuels from coal, oil, shale and coal tars. But today that process has...
Đọc tiếp

II/ Read the text and choose the best answers A, B, C or D. to the questions. (1m)

Most of the countries in the world have searched for alternative sources of energy in various directions. Many communities are burning garbage and other biological waste products to produce electricity. Converting waste products to gases or oil is also an efficient way to dispose of waste.

Experimental work is being done to derive synthetic fuels from coal, oil, shale and coal tars. But today that process has proven expensive. Other experiments are underway to harness power with giant windmills. Geothermal power heat from the earth is also being tested.

Some experts expect utility companies to revive hydroelectric power derived from streams and rivers. Fifty years ago hydroelectric power provided one third of the electricity used in the United States, but today it supplies only five percent. The oceans are another potential source of energy. Scientists are studying ways to convert the energy of ocean currents, tides, and waves to electricity. Experiments are also underway to make use of the temperature differences in ocean water to produce energy.

1. Which is the best title of the passage?

A. The use of water productions for energy

B. Efficient ways of disposing of waste

C. The search for Alternative Sources of Energy

D. New Discoveries in Geothermal Power

2. Fifty years ago one third of the electricity in the United States was provided by_________.

A. wind B. waste products C. oil D. water

3. In the second paragraph, the phrase “synthetic fuels” could be best replaced by which of the following _________.

A. biological fuels B. artificial made fuels

C. low burning fuels D. fast burning fuels

4. Which of the following is NOT mentioned in the passage as an alternative source of energy?

A. electricity B. burning of garbage

C. geothermal power D. synthetics fuels

5. According to the author, the impracticability of using coal, oil shale and coal tars as sources of energy is due to _________.

A. their being money consuming B. their being time consuming

C. the scarcity of sources D. the lack of technology

2
4 tháng 1 2020

1. C

2.

3. B

4. A

5. A

4 tháng 1 2020

cau 2 la dap an nao