Frogs are amphibians, meaning that they can live both in and out of the water. All frogs lay their eggs in the water, and a female frog will lay thousands of eggs at a time. When the eggs hatch, (1)__...

Frogs are amphibians, meaning that they can live both in and out of the water. All frogs lay their eggs in the water, and a female frog will lay thousands of eggs at a time. When the eggs hatch, (1)___babies__ come out are not frogs but rather tadpoles. Unlike frogs, tadpoles must spend all their time in the (2)___water__, being unable to breathe air at this point. Tadpoles also lack arms and legs, and have a tail which they (3)___disappear__ as they develop into frogs. Tadpoles are herbivours, which means that they only eat (4)__plants___. Specially, tadpoles eat algae, a water plant which can be harmful if there is too much of it. (5)___Therefore__, tadpoles are important to keep most ponds healthy. As tadpoles develop into mature frogs, they develop the lungs which allow them to (6)___get___ air, and the arms and legs which allow them to move across (7)___ground __. At this point the mature frogs leave the ponds, (8)__so___ some species stay near the water for their entire lives. Mature frogs are carnivores, (9)__eating___ insects and small fish. Most frogs hunt using their long, sticky tongueto catch their prey. Some species of frogs have developed extremely strong poisons to defend (10)___themselves__ from their other animals.Câu trả lời: Frogs are amphibians, meaning that they can live both in and out of the water. All frogs lay their eggs in the water, and a female frog will lay thousands of eggs at a time. When the eggs hatch, (1)___babies__ come out are not frogs but rather tadpoles. Unlike frogs, tadpoles must spend all their time in the (2)___water__, being unable to breathe air at this point. Tadpoles also lack arms and legs, and have a tail which they (3)___disappear__ as they develop into frogs. Tadpoles are herbivours, which means that they only eat (4)__plants___. Specially, tadpoles eat algae, a water plant which can be harmful if there is too much of it. (5)___Therefore__, tadpoles are important to keep most ponds healthy. As tadpoles develop into mature frogs, they develop the lungs which allow them to (6)___get___ air, and the arms and legs which allow them to move across (7)___ground __. At this point the mature frogs leave the ponds, (8)__so___ some species stay near the water for their entire lives. Mature frogs are carnivores, (9)__eating___ insects and small fish. Most frogs hunt using their long, sticky tongueto catch their prey. Some species of frogs have developed extremely strong poisons to defend (10)___themselves__ from their other animals.

Frogs are amphibians, meaning that they can live both in and out of the water. All frogs lay their eggs in the water, an...

DV

Dang Van An

20 tháng 10 2018

Help me PAPER RECYCLING A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and plantations. By world...

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Help me

PAPER RECYCLING

A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and plantations. By world standards, this is a good performance since the worldwide average is 33 percent waste paper. Governments have encouraged waste paper collection and sorting schemes and at the same time, the paper industry has responded by developing new recycling technologies that have paved the way for even greater utilization of used fibre. As a result, industry’s use of recycled fibres is expected to increase at twice the rate of virgin fibre over the coming years.

B Already, waste paper constitutes 70% of paper used for packaging and advances in the technology required to remove ink from the paper have allowed a higher recycled content in newsprint and writing paper. To achieve the benefits of recycling, the community must also contribute. We need to accept a change in the quality of paper products; for example, stationery may be less white and of a rougher texture. There also needs to support from the community for waste paper collection programs. Not only do we need to make the paper available to collectors but it also needs to be separated into different types and sorted from contaminants such as staples, paperclips, string and other miscellaneous items.

C There are technical limitations to the amount of paper which can be recycled and some paper products cannot be collected for re-use. These include paper in the form of books and permanent records, photographic paper and paper which is badly contaminated. The four most common sources of paper for recycling are factories and retail stores which gather large amounts of packaging material in which goods are delivered, also offices which have unwanted business documents and computer output, paper converters and printers and lastly households which discard newspapers and packaging material. The paper manufacturer pays a price for the paper and may also incur the collection cost.

D Once collected, the paper has to be sorted by hand by people trained to recognise various types of paper. This is necessary because some types of paper can only be made from particular kinds of recycled fibre. The sorted paper then has to be repulped or mixed with water and broken down into its individual fibres. This mixture is called stock and may contain a wide variety of contaminating materials, particularly if it is made from mixed waste paper which has had little sorting. Various machineries are used to remove other materials from the stock. After passing through the repulping process, the fibres from printed waste paper are grey in colour because the printing ink has soaked into the individual fibres. This recycled material can only be used in products where the grey colour does not matter, such as cardboard boxes but if the grey colour is not acceptable, the fibres must be de-inked. This involves adding chemicals such as caustic soda or other alkalis, soaps and detergents, water-hardening agents such as calcium chloride, frothing agents and bleaching agents. Before the recycled fibres can be made into paper they must be refined or treated in such a way that they bond together.

E Most paper products must contain some virgin fibre as well as recycled fibres and unlike glass, paper cannot be recycled indefinitely. Most paper is down-cycled which means that a product made from recycled paper is of an inferior quality to the original paper. Recycling paper is beneficial in that it saves some of the energy, labour and capital that go into producing virgin pulp. However, recycling requires the use of fossil fuel, a non-renewable energy source, to collect the waste paper from the community and to process it to produce new paper. And the recycling process still creates emissions which require treatment before they can be disposed of safely. Nevertheless, paper recycling is an important economical and environmental practice but one which must be carried out in a rational and viable manner for it to be useful to both industry and the community.

i. Process of paper recycling

ii. Less threat of waste paper to the environment

iii. Collection of paper for recycling

iv. Sources of paper for recycling

v. Bad sides of paper recycling

vi. Contribution of community to recycling paper

Your answer:

1. Paragraph A .......................

2. Paragraph B .......................

3. Paragraph C .......................

4. Paragraph D .......................

5. Paragraph E .......................

#Tiếng anh lớp 10

1

AT

An Trần

20 tháng 10 2018

Help me

PAPER RECYCLING

A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and plantations. By world standards, this is a good performance since the worldwide average is 33 percent waste paper. Governments have encouraged waste paper collection and sorting schemes and at the same time, the paper industry has responded by developing new recycling technologies that have paved the way for even greater utilization of used fibre. As a result, industry’s use of recycled fibres is expected to increase at twice the rate of virgin fibre over the coming years.

B Already, waste paper constitutes 70% of paper used for packaging and advances in the technology required to remove ink from the paper have allowed a higher recycled content in newsprint and writing paper. To achieve the benefits of recycling, the community must also contribute. We need to accept a change in the quality of paper products; for example, stationery may be less white and of a rougher texture. There also needs to support from the community for waste paper collection programs. Not only do we need to make the paper available to collectors but it also needs to be separated into different types and sorted from contaminants such as staples, paperclips, string and other miscellaneous items.

C There are technical limitations to the amount of paper which can be recycled and some paper products cannot be collected for re-use. These include paper in the form of books and permanent records, photographic paper and paper which is badly contaminated. The four most common sources of paper for recycling are factories and retail stores which gather large amounts of packaging material in which goods are delivered, also offices which have unwanted business documents and computer output, paper converters and printers and lastly households which discard newspapers and packaging material. The paper manufacturer pays a price for the paper and may also incur the collection cost.

D Once collected, the paper has to be sorted by hand by people trained to recognise various types of paper. This is necessary because some types of paper can only be made from particular kinds of recycled fibre. The sorted paper then has to be repulped or mixed with water and broken down into its individual fibres. This mixture is called stock and may contain a wide variety of contaminating materials, particularly if it is made from mixed waste paper which has had little sorting. Various machineries are used to remove other materials from the stock. After passing through the repulping process, the fibres from printed waste paper are grey in colour because the printing ink has soaked into the individual fibres. This recycled material can only be used in products where the grey colour does not matter, such as cardboard boxes but if the grey colour is not acceptable, the fibres must be de-inked. This involves adding chemicals such as caustic soda or other alkalis, soaps and detergents, water-hardening agents such as calcium chloride, frothing agents and bleaching agents. Before the recycled fibres can be made into paper they must be refined or treated in such a way that they bond together.

E Most paper products must contain some virgin fibre as well as recycled fibres and unlike glass, paper cannot be recycled indefinitely. Most paper is down-cycled which means that a product made from recycled paper is of an inferior quality to the original paper. Recycling paper is beneficial in that it saves some of the energy, labour and capital that go into producing virgin pulp. However, recycling requires the use of fossil fuel, a non-renewable energy source, to collect the waste paper from the community and to process it to produce new paper. And the recycling process still creates emissions which require treatment before they can be disposed of safely. Nevertheless, paper recycling is an important economical and environmental practice but one which must be carried out in a rational and viable manner for it to be useful to both industry and the community.

i. Process of paper recycling

ii. Less threat of waste paper to the environment

iii. Collection of paper for recycling

iv. Sources of paper for recycling

v. Bad sides of paper recycling

vi. Contribution of community to recycling paper

Your answer:

1. Paragraph A ...........iii. Collection of paper for recycling............

2. Paragraph B ..........vi. Contribution of community to recycling paper.............

3. Paragraph C ...........iv. Sources of paper for recycling............

4. Paragraph D ............i. Process of paper recycling...........

5. Paragraph E ...........v. Bad sides of paper recycling............

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DV

Dang Van An

19 tháng 10 2018

Giúp mình đc ko mng PAPER RECYCLING A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and...

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Giúp mình đc ko mng PAPER RECYCLING

A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and plantations. By world standards, this is a good performance since the worldwide average is 33 percent waste paper. Governments have encouraged waste paper collection and sorting schemes and at the same time, the paper industry has responded by developing new recycling technologies that have paved the way for even greater utilization of used fibre. As a result, industry’s use of recycled fibres is expected to increase at twice the rate of virgin fibre over the coming years.

B Already, waste paper constitutes 70% of paper used for packaging and advances in the technology required to remove ink from the paper have allowed a higher recycled content in newsprint and writing paper. To achieve the benefits of recycling, the community must also contribute. We need to accept a change in the quality of paper products; for example, stationery may be less white and of a rougher texture. There also needs to support from the community for waste paper collection programs. Not only do we need to make the paper available to collectors but it also needs to be separated into different types and sorted from contaminants such as staples, paperclips, string and other miscellaneous items.

C There are technical limitations to the amount of paper which can be recycled and some paper products cannot be collected for re-use. These include paper in the form of books and permanent records, photographic paper and paper which is badly contaminated. The four most common sources of paper for recycling are factories and retail stores which gather large amounts of packaging material in which goods are delivered, also offices which have unwanted business documents and computer output, paper converters and printers and lastly households which discard newspapers and packaging material. The paper manufacturer pays a price for the paper and may also incur the collection cost.

D Once collected, the paper has to be sorted by hand by people trained to recognise various types of paper. This is necessary because some types of paper can only be made from particular kinds of recycled fibre. The sorted paper then has to be repulped or mixed with water and broken down into its individual fibres. This mixture is called stock and may contain a wide variety of contaminating materials, particularly if it is made from mixed waste paper which has had little sorting. Various machineries are used to remove other materials from the stock. After passing through the repulping process, the fibres from printed waste paper are grey in colour because the printing ink has soaked into the individual fibres. This recycled material can only be used in products where the grey colour does not matter, such as cardboard boxes but if the grey colour is not acceptable, the fibres must be de-inked. This involves adding chemicals such as caustic soda or other alkalis, soaps and detergents, water-hardening agents such as calcium chloride, frothing agents and bleaching agents. Before the recycled fibres can be made into paper they must be refined or treated in such a way that they bond together.

E Most paper products must contain some virgin fibre as well as recycled fibres and unlike glass, paper cannot be recycled indefinitely. Most paper is down-cycled which means that a product made from recycled paper is of an inferior quality to the original paper. Recycling paper is beneficial in that it saves some of the energy, labour and capital that go into producing virgin pulp. However, recycling requires the use of fossil fuel, a non-renewable energy source, to collect the waste paper from the community and to process it to produce new paper. And the recycling process still creates emissions which require treatment before they can be disposed of safely. Nevertheless, paper recycling is an important economical and environmental practice but one which must be carried out in a rational and viable manner for it to be useful to both industry and the community.

i. Preocess of paper recycling

ii. Less threat of waste paper to the environment

iii. Collection of paper for recycling

iv. Sources of paper for recycling

v. Bad sides of paper recycling

vi. Contribution of community to recycling paper

Your answer:

1. Paragraph A .......................

2. Paragraph B .......................

3. Paragraph C .......................

4. Paragraph D .......................

5. Paragraph E .......................

#Tiếng anh lớp 10

0

CL

Cường Lê

20 tháng 2 2020

Pick out the word which has the underlined and bold part pronounced differently from the rest: (1m) 1. A. here B.cheer C. atmosphere D. where 2. A. teach B.much C. school D. choice 3. A. called B. organized C. happened D. filled 4. A. about B. bench C. but D. comb II.Choose the best answer: (5.5 ms) 5. Whales are the most intelligent …………that has ever lived on Earth. A. animal B. plant C. fish D. tree 6. Deforestation is destroying large areas of tropical rain forest. A. changing...

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Pick out the word which has the underlined and bold part pronounced differently from the rest: (1m) 1. A. here B.cheer C. atmosphere D. where 2. A. teach B.much C. school D. choice 3. A. called B. organized C. happened D. filled 4. A. about B. bench C. but D. comb II.Choose the best answer: (5.5 ms) 5. Whales are the most intelligent …………that has ever lived on Earth. A. animal B. plant C. fish D. tree 6. Deforestation is destroying large areas of tropical rain forest. A. changing B. raising C. becoming D. damaging 7. Many sea animals are at..........................due to hunting and water pollution. A. loss B. death C. risk D. danger 8.We………………..use herbicides, pesticides and fertilizers that harm the environment A. should not B. should C. will D. does not 9. A: I don’t know how to use this camera? B: It's quite easy. ……........... you A. I going to show B. I'll show C. I’m will show D. I’m going to show 10.The animals are not kept in …………..they can live in their natural environment A. cages B. house C. hotel D. restaurant 11. If you ………… to me, you wouldn’t have got so much trouble. A. listened B. would listen C. had listened D. would have listened 12. There is a large …………….. of animals that live in Nairobi National Park. A. varied B. vary C. variety D. various 13. My home village is …………….. 40 kilometres north of the capital. A. held B. surrounded C. laid D. located 14. Would you like………………………. lunch with us? ”. B: “Yes I’d love to”. A. have B. to have C. having D. had 15.If you don’t know how to spell a word, you ……… look it up in the dictionary. A. must B. will C. should D. ought 16. These flowers are fresh. They .................... from the garden A. have been just picked B. have just been picked C. have been picked just D. just have been picked 17. You .............. go to bed late. It’s not good for your health. A. mustn’t B. should C. shouldn’t D. oughtn’t 18. Linda: Excuse me. Where’s the post office? Maria: ………………. A. It’s over there B. I’m afraid not. C. Don’t worry. D. Yes, I think so. 19. I think you ................study hard for the next exam. A. could B. will C. would D. should 20.The life ......... of sperm whale can be up to seventy years. A. distance B. period C. length D. span 21.If Lan had worn a rain coat, she ............... a cold A. had got B. wouldn’t get C. won’t get D. wouldn’t have got 22. The child’s arm was swollen because he ……………….. by a bee. A. stung B. had stung C. had being stung D. had been stung 23. Some plants and animals are ________ organisms because they are extremely small. A. huge B. tiny C. big D. oversized 24. By the end of last summer, the farmers .............all the crop. A. harvested B. had harvested C. harvest D. are harvested 25. What would Tom do if he ______ the truth? A. would know B. has known C. know D. knew 26. Sperm whales prefer the waters with high ________ populations, which are their main diet. A. turtle B. squid C. shark D. sea lion III. Choose the underlined part that needs correcting. (1.25 ms) 27.My parents(A) often take careful(B) of me when(C) I am ill(D). 28. Many(A) people think(B) this novel(C) writing(D) by Ngo Tat To. 29.Children(A) shouldn’t to spend(B) too much(C) time playing(D) computer game.. 30. A new(A) law(B) has passed(C) to protect(D) the national parks. 31. Many new roads is(A)being built(B) in this city(C) at the moment(D). IV. Read the passage below and choose the one option-A,B,C or D that best fits each of the numbered blank(1m) Dolphins are known as (32)______ mammal. They breathe air, they are warm-blooded, and they bear live young ones called calves. The size of dolphins varies greatly. The smallest dolphin is just about 50 kg in (33)_____ and 1.2 meters in length while the largest one can weigh up to 8.200 kg and is 10 meters long. Dolphins are sociable creatures. They swim together in group. They show great ability in the water and you can often come across them playing around ships. Dolphins are interested in humans and often rescue people in the sea who are in danger. They are intelligent creatures and make sounds to (34) ________with each other. Scientists have studied dolphins (35) ________many years and are now looking into the possibility of dolphins that are able to carry out tasks under the sea. 32. A. mountain B. marine C. land D. forest 33. A. length B. width C. weight D. depth 34. A. talk B. speak C. communicate D. tell 35. A. in B. since C. for D. during V. Read the passage below carefully, and then choose the best answer (1.25ms) Most people are afraid of sharks, but they usually do not know much about them. For example, there are about 350 species of sharks that live in oceans over the world. All of the sharks are carnivores, but most of them don't attack people. Some sharks are very small - the smallest shark is about 6 inches long - about as long as your hand. But some sharks are very large. The largest species of sharks may be 60 feet long and weigh 15 tons. Unlike many other kinds of fish, sharks do not have bone. Their bodies are made up of a kind of tough white flexible material (called cartilage). Sharks do not have ears. However, they 'hear’ sounds and movements in the wade. Any sound or movement makes the water vibrates. Sharks can feel these vibrations and they help the sharks find food. Sharks use their large eyes to find food, too. Most sharks see best in low light. They often hunt for food at dawn, in the evening, or in the middle of the night. Nowadays scientists want to learn more about sharks for several reasons. For example, cancer is common in many animals, including, people. However. it is rare in sharks. Scientists want to find out why sharks almost never get cancer. Maybe this information can help people prevent cancer too. 36. According to the passage, sharks _________. A. have ears B. are big mammals C. are afraid of people D. are meat eaters 37. The word they in the passage refers to _________. A. vibrations B. sharks C. sounds D. movements 38. Which of the following statements is NOT true? A. Sharks often attack people. B. Large sharks can weigh up to 15,000 kg. C. Sharks' bodies are made up of cartilage. D. Sharks can find their food by feeling vibrations. 39. Most sharks see best in _________. A. dark light B. low light C. think fog D. light fog 40. Scientists are learning more about sharks to _________. A. help sharks prevent cancer. B. find out why sharks always get cancer. C. hunt sharks more easily. D. find out why cancer is rare in sharks.

#Tiếng anh lớp 10

1

H

Hoaa

21 tháng 2 2020

Pick out the word which has the underlined and bold part pronounced differently from the rest: (1m)

1. A. here B.cheer C. atmosphere D. where

2. A. teach B.much C. school D. choice

3. A. called B. organized C. happened D. filled ???

4. A. about B. bench C. but D. comb

II.Choose the best answer: (5.5 ms)

5. Whales are the most intelligent …………that has ever lived on Earth.

A. animal B. plant C. fish D. tree

6. Deforestation is destroying large areas of tropical rain forest.

A. changing B. raising C. becoming D. damaging

7. Many sea animals are at..........................due to hunting and water pollution.

A. loss B. death C. risk D. danger

8.We………………..use herbicides, pesticides and fertilizers that harm the environment

A. should not B. should

C. will D. does not

9. A: I don’t know how to use this camera?

B: It's quite easy. ……........... you

A. I going to show

B. I'll show C. I’m will show D. I’m going to show

10.The animals are not kept in …………..they can live in their natural environment A. cages B. house C. hotel D. restaurant

11. If you ………… to me, you wouldn’t have got so much trouble.

A. listened B. would listen C. had listened D. would have listened

12. There is a large …………….. of animals that live in Nairobi National Park. A. varied B. vary C. variety D. various

13. My home village is …………….. 40 kilometres north of the capital. A. held B. surrounded C. laid D. located

14. Would you like………………………. lunch with us? ”.

B: “Yes I’d love to”.

A. have B. to have C. having D. had

15.If you don’t know how to spell a word, you ……… look it up in the dictionary. A. must B. will C. should D. ought

16. These flowers are fresh. They .................... from the garden

A. have been just picked B. have just been picked C. have been picked just D. just have been picked

17. You .............. go to bed late. It’s not good for your health.

A. mustn’t B. should C. shouldn’t D. oughtn’t

18. Linda: Excuse me. Where’s the post office? Maria: ……………….

A. It’s over there B. I’m afraid not. C. Don’t worry. D. Yes, I think so.

19. I think you ................study hard for the next exam.

A. could B. will C. would D. should

20.The life ......... of sperm whale can be up to seventy years.

A. distance B. period C. length D. span

21.If Lan had worn a rain coat, she ............... a cold A. had got B. wouldn’t get C. won’t get D. wouldn’t have got

22. The child’s arm was swollen because he ……………….. by a bee. A. stung B. had stung C. had being stung D. had been stung

23. Some plants and animals are ________ organisms because they are extremely small. A. huge B. tiny C. big D. oversized

24. By the end of last summer, the farmers .............all the crop. A. harvested B. had harvested C. harvest D. are harvested

25. What would Tom do if he ______ the truth? A. would know B. has known C. know D. knew

26. Sperm whales prefer the waters with high ________ populations, which are their main diet. A. turtle B. squid C. shark D. sea lion

III. Choose the underlined part that needs correcting. (1.25 ms)

27.My parents(A) often take careful(B) =>care of me when(C) I am ill(D).

28. Many(A) people think(B) this novel(C) ửiting=>is written (D) by Ngo Tat To

29.Children(A) shouldn’t to =>bỏ spend(B) too much(C) time playing(D) computer game..

30. A new(A) law(B) has passed(C)=>has been passed to protect(D) the national parks.

31. Many new roads is(A) =>are being built(B) in this city(C) at the moment(D

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CL

Cường Lê

21 tháng 2 2020

Mình cảm ơn ạ

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B

Buddy

6 tháng 2 2023

2. Read the text and choose the best tittle for it.(Đọc văn bản và chọn tiêu đề hay nhất.)a. Environmental problems: What are they?b. Environmental protection: How important is it?c. Environmental solutions: How practical are they?The environment we live in is facing many serious problems. We need to be aware of these problems so that we can find ways to protect nature.A. Global warming is the rise in the average temperature of the earth's atmosphere. It is one of the biggest...

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#Tiếng anh lớp 10

2

QT

Quoc Tran Anh Le

Giáo viên

10 tháng 9 2023

Đoạn A nói về vấn đề nóng lên toàn cầu, đoạn B nói về nạn chặn cây phá rừng tự nhiên, đoạn C nói về ô nhiễm không khí, đoạn D nói về sự tuyệt chủng loài. Đây đều là các vấn đề về môi trường => chọn a.

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QT

Quoc Tran Anh Le

Giáo viên

10 tháng 9 2023

Tạm dịch:

a. Các vấn đề về môi trường: Chúng là gì?

b. Bảo vệ môi trường: Nó quan trọng như thế nào?

c. Các giải pháp môi trường: Chúng thực tế như thế nào?

Môi trường chúng ta sống đang phải đối mặt với nhiều vấn đề nghiêm trọng. Chúng ta cần nhận thức rõ những vấn đề này để có thể tìm cách bảo vệ thiên nhiên.

A. Sự nóng lên toàn cầu là sự gia tăng nhiệt độ trung bình của khí quyển trái đất. Đó là một trong những vấn đề lớn nhất mà con người phải đối mặt ngày nay. Nó có thể gây ra những hậu quả nghiêm trọng như mực nước biển dâng cao, băng tan ở hai cực và các hiện tượng thời tiết khắc nghiệt như lũ lụt hoặc sóng nhiệt.

B. Một vấn đề môi trường khác là chặt phá rừng tự nhiên. Việc mất rừng có thể có tác động tiêu cực đến môi trường. Nó có thể làm hư hại môi trường sống tự nhiên của nhiều loài động vật và khiến động vật hoang dã gặp nguy hiểm. Nó cũng có thể phá hủy đất tự nhiên và dẫn đến biến đổi khí hậu.

C. Ô nhiễm không khí cũng là một vấn đề nghiêm trọng. Nguyên nhân chủ yếu là do khí thải từ xe cộ, máy móc hoặc nhà máy. Khi những khí độc hại này kết hợp với nước trong không khí, chúng sẽ tạo thành mưa hoặc tuyết, có thể gây hại cho mọi dạng sống. Ngoài ra, vấn đề này còn dẫn đến hiện tượng nóng lên toàn cầu và biến đổi khí hậu. Nó cũng là nguyên nhân chính gây ra các bệnh về đường hô hấp hay thậm chí là ung thư phổi.

D. Trên khắp thế giới, số lượng các loài động vật có nguy cơ tuyệt chủng đang tăng lên. Nhiều con trong số chúng biến mất vì ô nhiễm và biến đổi khí hậu. Ngoài ra, còn vì con người săn bắt và giết động vật một cách bất hợp pháp và đánh bắt quá nhiều cá cùng một lúc. Điều này đang làm đảo lộn sự cân bằng tự nhiên của các hệ sinh thái, có thể gây hại cho tất cả các sinh vật sống và không sống.

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Dương Minh

15 tháng 8 2018

Read the passage and statements below carefully, and then say whether the statements are true (T), false (F) or not given (No)HOW ARE BALLET DANCERS TRAINED?Girls who study ballet generally begin by age eight to ten. Boys often start later. Ballet training is hard work. Ballet students must develop strength, balance, and flexibility as well as grace. They must learn a set of movements and gestures. Girls also learn to dance on their toes. They usually begin pointe (tip-of-the-toes) work after...

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