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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

SAVING THE ENVIRONMENT: ONE HOME AT A TIME Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things. First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to...
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SAVING THE ENVIRONMENT: ONE HOME AT A TIME Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things. First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to produce paper products. It takes very little effort. It is not hard to place plastic and glass bottles, aluminum cans and paper in a bin. Anyone can do it. Second, we need to watch the amount of water used in the home. It can be conserved by taking short showers instead of baths, repairing leaky faucets, using the dishwasher or washing machine only when fully loaded, or simply turning the faucet off while brushing your teeth. Third, we need to reduce waste. We need to recycle whenever possible, but should also try to use this waste effectively. For example, grass clippings and food scraps can be made into compost for plants. The average person produces 4.3 pounds of waste every day, but we can reduce that amount by recycling and reusing. If we do our part in our own homes, we can help keep the planet from becoming more polluted. Question 36: Pollution can be caused from the following sources EXCEPT______. A. water in rivers B. water from households C. wastes D. household chemicals Question 37: Recycling can help us ______. A. never cut down trees B. use products again and again C. place garbage bins easily D. produce more paper products Question 38: In order to save water, we can do all of the following things EXCEPT______. A. take short showers instead of baths B. repair leaky faucets C. fully use the washing machine D. turn the faucet off while brushing your teeth Question 39: Recycling helps to reduce waste because______. A. plants need to develop B. a person can do it in his home C. waste can be recycled and reused D. an average man produces compost for plants Question 40: The word "It" in paragraph 2 refers to ______. A. cutting down B. the number C. recycling D. effort
1
18 tháng 1 2020

Question 36: Pollution can be caused from the following sources EXCEPT______. A. water in rivers B. water from households C. wastes D. household chemicals

Question 37: Recycling can help us ______. A. never cut down trees B. use products again and again C. place garbage bins easily D. produce more paper products

Question 38: In order to save water, we can do all of the following things EXCEPT______. A. take short showers instead of baths B. repair leaky faucets C. fully use the washing machine D. turn the faucet off while brushing your teeth

Question 39: Recycling helps to reduce waste because______. A. plants need to develop B. a person can do it in his home C. waste can be recycled and reused D. an average man produces compost for plants

Question 40: The word "It" in paragraph 2 refers to ______. A. cutting down B. the number C. recycling D. effort

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...
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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____

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.   The explosion in mobile phone use around the...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

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

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

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

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

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

Question: What could be the most suitable title for the passage?

A. Technological Innovations and Their Price

B. The Way Mobile Phones Work

C. Mobile Phones: A Must of Our Time

D. The Reasons Why Mobile Phones Are Popular

1
13 tháng 4 2019

Đáp án A.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.   The explosion in mobile phone use around the...
Đọc tiếp

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

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

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

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

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

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

Question: The phrase “negative publicity” in paragraph 2 most likely means _______.

A. poor ideas about the effects of cellphones

B. information on the lethal effects of cellphones

C. the negative public use of cellphones

D. widespread opinion about bad effect of cellphones

1
22 tháng 8 2018

Đáp án B.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.   The explosion in mobile phone use around the...
Đọc tiếp

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

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

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

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

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

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

Question: According to the passage, cellphones are very popular with young people because _______.

A. they make them look more stylish

B. they are worrying

C. they are a means of communication

D. they are considered unusual

1
30 tháng 1 2019

Đáp án A.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.   The explosion in mobile phone use around the...
Đọc tiếp

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

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

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

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

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

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

Question: The word “potentially” in paragraph 4 is closet in meaning to _______.

A. possibly

B. privately

C. obviously

D. certainly

1
4 tháng 2 2017

Đáp án A.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.   Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.   The explosion in mobile phone use around the...
Đọc tiếp

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

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

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

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

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

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

Question: The word “they” in paragraph 2 refers to _______.

A. doctors

B. ideas

C. professionals

D. companies

1
19 tháng 7 2017

Đáp án D.

1. Robots can ............. our houses when we are away. 2. In the future, robots will be able to do more ............. things for us. 3. I don't agree .............. you that robots will be able to write a letter to an English friend. 4. They will be very useful because they will be able to do ............. everything for us. 5. Do you think robots can work longer than people ............. getting tired. 6. My father always ............. coffee at home instead of going to the coffee...
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1. Robots can ............. our houses when we are away.

2. In the future, robots will be able to do more ............. things for us.

3. I don't agree .............. you that robots will be able to write a letter to an English friend.

4. They will be very useful because they will be able to do ............. everything for us.

5. Do you think robots can work longer than people ............. getting tired.

6. My father always ............. coffee at home instead of going to the coffee shop.

7. Robots will be able to .............. to personal computer in the future.

8. Nowadays robot can't talk to people or play sports, but in the future I think they ...............

9. Will robots be able ............. our voices?

10. Robots can't talk to people or recognise our voices, but scientists are working ................ the solution.

11. Many people think spending money on robots is a complete ................. of time and money.

12. ....................... you walk when you were two?

13. These robots can do many things for the ............ such as cleaning streets or looking after the garden.

14. Home robots can do things .................... repairing things around the house of looking after the garden.

15. ............. do you think about the new kinds of robots?

16. Our future robot will be able to help us ................ the gardening.

17. Robots are helping us a lot in industry, education, and in our house - ...................

18. We waste a lot of money and time researching and making robots. .......................

19. We must be careful because some people may use robots...............

20. Robots will be very useful for our lives but they use ................. energy.

0
Complete the sentences with the correct form of the words in brackets: 1. Carnival is a popular ________ in many countries in South Amaerica. (festive) 2. It usually happens in February, and South American people ______ it in different ways. (celebration) 3. The Rio Carnival is the biggest and most famous, with most lively _________ (celebrate) 4. It gives people a chance to learn about the true _______ of Brazil. (cultural) 5. People wear costumes and ______ through the streets, playing...
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Complete the sentences with the correct form of the words in brackets:

1. Carnival is a popular ________ in many countries in South Amaerica. (festive)

2. It usually happens in February, and South American people ______ it in different ways. (celebration)

3. The Rio Carnival is the biggest and most famous, with most lively _________ (celebrate)

4. It gives people a chance to learn about the true _______ of Brazil. (cultural)

5. People wear costumes and ______ through the streets, playing samba music and dancing. (parade)

6. The highlight of the Rio Carnival is the Samba Parade with thousands of samba _________ from various samba schools. (perform)

7. A lot of ________and _______ activities are held as part of the Flower Festival in Dalat. (culture/ artist)

8. There is a special __________ for Japanese girls on March 3rd every year. (celebrate)

9. I saw a parade of flower floats when I ______the festival last year. (attend)

10. I love the _________ of folk songs. (performer)

11. We had a ________ meal on my grandfather’s birthday. (celebrate)

12. The christmas season is also called the ______ season. (festival)

13. Villages _______ contribute money and other things to celebrate the festival. (volunteer)

14. The _______ atmosphere is felt around all the villages. (festival)

15. There are some other activities such as ______ shows,buffalo races, and _____ games. (culture/ tradition)

16. La Tomatina is a _______ festival to celebrate the tomato harvest. (season)

17. Halloween is a _______ festival. People often put pumpkin lanternsoutside their house. (religion)

18. _______ energy is renewable. Moreover it is clean and safe. (sun)

19. Biogas is mainly used for ______ and _______. (cook/ hot)

20. People in ______ are have to gather wood to use as fuel. (mountain)

21. Biogas helps solve the problem of indoor air _________. (pollute)

22. In the future, the wind and the sun will be used as the main _________ friendly energy sources. (environment)

23. Many poor people in developind countries have little _______. (electric)

24. _________,fossil fuels are harmful to the environment. (fortunate)

25. We are looing for cheap, clean and ________ sources of energy. (effect)

26. We shouldn’t waste ________ resources. (nature)

2
21 tháng 4 2018

1.festival

2.celebrate

3.celebrations

4.culture

5.parade

6.performers

7. cultural/ artistic

8. celebration

9. parade

10. performance

11. celebratory

12. festive

13. voluntarily

14. festive

15. cultural/ traditional

16. seasonal

(Còn lại bạn tự làm nhé!)

21 tháng 4 2018

1. Carnival is a popular festival in many countries in South Amaerica. (festive)

2. It usually happens in February, and South American people celebrate it in different ways. (celebration)

3. The Rio Carnival is the biggest and most famous, with most lively celebration (celebrate)

4. It gives people a chance to learn about the true culture of Brazil. (cultural)

5. People wear costumes and parade through the streets, playing samba music and dancing. (parade)

6. The highlight of the Rio Carnival is the Samba Parade with thousands of samba performers from various samba schools. (perform)

7. A lot of cultural and artistic activities are held as part of the Flower Festival in Dalat. (culture/ artist)

8. There is a special celebration for Japanese girls on March 3rd every year. (celebrate)

9. I saw a parade of flower floats when I attended the festival last year. (attend)

10. I love the performance of folk songs. (performer)

11. We had a celebratory meal on my grandfather’s birthday. (celebrate)

12. The christmas season is also called the festive season. (festival)

13. Villages voluntarily contribute money and other things to celebrate the festival. (volunteer)

14. The festive atmosphere is felt around all the villages. (festival)

15. There are some other activities such as cultural shows,buffalo races, and traditional games. (culture/ tradition)

16. La Tomatina is a seasonal festival to celebrate the tomato harvest. (season)

17. Halloween is a festival. People often put pumpkin lanternsoutside their house. (religion)

18. solar energy is renewable. Moreover it is clean and safe. (sun)

19. Biogas is mainly used for cooking and heating. (cook/ hot)

20. People in mountainous are have to gather wood to use as fuel. (mountain)

21. Biogas helps solve the problem of indoor air pollution. (pollute)

22. In the future, the wind and the sun will be used as the main environmental friendly energy sources. (environment)

23. Many poor people in developind countries have little electricity. (electric)

24. _________,fossil fuels are harmful to the environment. (fortunate)

25. We are looing for cheap, clean and efficiently sources of energy. (effect)

26. We shouldn’t waste natural resources. (nature)