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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 from 34 to 40. An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth...
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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 from 34 to 40.

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adverselyAir pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature's output of these compounds dwarfs that resulting from human activities. However, human production usually occurs in a localized area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

For which of the following reasons can natural pollutants play an important role in controlling air pollution?

A. They function as part of a purification process

B. They occur in greater quantities than other pollutants

C. They are less harmful to living beings than other pollutants

D. They have existed since the Earth developed

1
24 tháng 5 2018

A

Lý do nào dưới đây khiến chất gây ô nhiễm tự nhiên có thể đóng vai trò quan trong trong việc kiểm soát ô nhiễm không khí?

A.   Chúng đóng vai trong là một phần của quá trình thanh lọc

B.   Chúng chiếm số lượng lớn hơn những chất ô nhiễm

C.   Chúng ít có hại với vật thể sống hơn các chất ô nhiễm khác

D.   Chúng đã tồn tại từ khi trái đất phát triển

Dẫn chứng: Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles.

Tạm dịch:  Nhiều chất gây ô nhiễm không khí quan trọng hơn, chẳng hạn như oxit lưu huỳnh, carbon monoxide và nitơ oxit, được tìm thấy trong tự nhiên. Khi Trái đất phát triển, nồng độ của các chất ô nhiễm này bị thay đổi bởi các phản ứng hóa học khác nhau; chúng trở thành các thành phần trong các chu trình hóa sinh

=> Đáp án: A

17 tháng 6 2019

Đáp án: D

Giải thích: Ở câu "Slang, however, refers to words and expressions understood by a large number of speakers but not accepted as appropriate formal usage by the majority.", tác giả có nhắc đến “Tiếng lóng chỉ từ ngữ và cách diễn đạt nhiều người hiểu nhưng không được phần đông chấp nhận là ngôn ngữ trang trọng.”

25 tháng 8 2018

Đáp án: C

7 tháng 10 2019

Đáp án: B

22 tháng 4 2019

Đáp án: D

17 tháng 8 2018

Đáp án B

Kiến thức: Đọc hiểu

Giải thích:

Ý chính của đoạn cuối cùng là gì?

  A. Các nhà khoa học nghiên cứu về lão hóa đã kiểm soát quá trình lão hóa.

  B. Các nhà khoa học nghiên cứu về lão hóa đang làm việc chăm chỉ để giúp mọi người sống lâu hơn và khỏe mạnh hơn.

  C. Các nhà khoa học nghiên cứu về lão hóa đang cố gắng mang lại cho con người một cuộc sống vĩnh cửu.

  D. Các nhà khoa học nghiên cứu về lão hóa hiện có thể làm chậm quá trình lão hóa.

Thông tin: They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years.

Tạm dịch: Họ đang nỗ lực tìm ra cách mà chiếc đồng hồ này hoạt động để có thể làm chậm đi quá trình này. Điều này có thể giúp cho con người sống lâu hơn và có được những năm tháng đóng góp nhiều hơn. 

26 tháng 9 2019

Đáp án: D

Giải thích: Mấu chốt của câu này là các em phải đọc hết đoạn cuối để suy ra cái mà tác giả muốn hướng tới: Con người phải đối mặt với sự lựa chọn khó khăn: sự sống của mình hay cứu lấy động vật.

30 tháng 12 2018

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   from   22  to  26A.   Read the passage carefully, then choose the correct answer.The ruined temples of Angkor are perhaps one of the mast impressive Seven Wonders of the World. Located in modern day Cambodia near Lake TonIe Sap, the largest freshwater lake in Asia, Angkor was the seat of power for the Khmer Empire from the ninth to 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   from   22  to  26

A.   Read the passage carefully, then choose the correct answer.

The ruined temples of Angkor are perhaps one of the mast impressive Seven Wonders of the World. Located in modern day Cambodia near Lake TonIe Sap, the largest freshwater lake in Asia, Angkor was the seat of power for the Khmer Empire from the ninth to the fifteenth century. The ruins of Angkor are documented as same .of the mast impressive ones in the world, rivaling the pyramids of Giza in Egypt. Why this mighty civilization died out is a question that archeologists are now only beginning to ponder. The answer, it turns out, may be linked with the availability of fresh water.

One possible explanation far the downfall of the Khmer Empire has to do with the inhabitants' irrigation system. The temple and palaces of Angkor were constructed around a series of artificial reservoirs and canals which were annually flooded to capacity by the Mekong River. Once filled, they were used to irrigate the surrounding rice patties and farmland during the course of the year. Farmers were completely dependent upon the water for their crucial rice crop. Without consistent irrigation, the farmers would have been unable to maintain functional crop production.

Scientists speculate that toward the end of the Khmer Empire the hydraulic systems of the reservoirs and canals broke down. The construction of hundreds of sandstone temples and palaces required an enormous amount of physical labor. In addition, as the capital of the Khmer Empire, Angkor contained upwards of one hundred thousand people who resided in and around Angkor. In order to feed so many people, the local farmers were driven to grow food quicker and more efficiently. After centuries of continual use, the irrigation system was pushed beyond its capacity. Soil erosion, nutrient depletion, and the loss of water led to decrease in the food supply. With less food available, the people of Angkor slowly began to migrate to other parts of Cambodia thus leaving the marvelous city of Angkor to be swallowed by the jungle. Therefore, it is speculated that the Khmer Empire may have fallen victim to its own decrepit infrastructure.

22. What is the passage mainly about?

A. Modern day agricultural procedures in Cambodia.

B. A possible explanation for the, decline of a civilization.

C. The essential role water plays in farming.

D. Religious temples of the ancient Khmer Empire.

23. The passage preceding the passage most likely discusses ______.

A. architecture of ancient Asian civilization

B. religious practices of the people of Angkor

C. the form of government practiced by the Khmer Empire

D. the other six wonders of the world

24. According to the passage, Lake Tonle Sap in Cambodia ______.

A. is an enormous fresh body of water in Asia

B. was unable to supply enough fish for the people of Angkor

C. became polluted due to a population explosion

D. is one of the Seven Wonders of the World

25. Why does the author mention the hydraulic systems of the reservoirs?

A. They supplied irrigation from the Indian Ocean.

B. They became non-functional due to overuse.

C. They were destroyed by nearby warrior tribes.

D. They helped transport the sandstones for constructing temples.

26. It can be inferred from the passage that the inhabitants of the Khmer Empire ______.

A. were intentionally starved by the farmers

B. lost their food source due to excess rainfall

C. supplemented their diets with 'meat hunted in the nearby jungles

D. depended upon rice as their main source of food

27. All the following are mentioned as events that can affect food supply EXCEPT.

A. erosion of soil                                       B. contamination of soil

C. reduction of nutrients                            D. loss of water supply

 

2
16 tháng 4 2022

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   22  to  26

A.   Read the passage carefully, then choose the correct answer.

The ruined temples of Angkor are perhaps one of the mast impressive Seven Wonders of the World. Located in modern day Cambodia near Lake TonIe Sap, the largest freshwater lake in Asia, Angkor was the seat of power for the Khmer Empire from the ninth to the fifteenth century. The ruins of Angkor are documented as same .of the mast impressive ones in the world, rivaling the pyramids of Giza in Egypt. Why this mighty civilization died out is a question that archeologists are now only beginning to ponder. The answer, it turns out, may be linked with the availability of fresh water.

One possible explanation far the downfall of the Khmer Empire has to do with the inhabitants' irrigation system. The temple and palaces of Angkor were constructed around a series of artificial reservoirs and canals which were annually flooded to capacity by the Mekong River. Once filled, they were used to irrigate the surrounding rice patties and farmland during the course of the year. Farmers were completely dependent upon the water for their crucial rice crop. Without consistent irrigation, the farmers would have been unable to maintain functional crop production.

Scientists speculate that toward the end of the Khmer Empire the hydraulic systems of the reservoirs and canals broke down. The construction of hundreds of sandstone temples and palaces required an enormous amount of physical labor. In addition, as the capital of the Khmer Empire, Angkor contained upwards of one hundred thousand people who resided in and around Angkor. In order to feed so many people, the local farmers were driven to grow food quicker and more efficiently. After centuries of continual use, the irrigation system was pushed beyond its capacity. Soil erosion, nutrient depletion, and the loss of water led to decrease in the food supply. With less food available, the people of Angkor slowly began to migrate to other parts of Cambodia thus leaving the marvelous city of Angkor to be swallowed by the jungle. Therefore, it is speculated that the Khmer Empire may have fallen victim to its own decrepit infrastructure.

22. What is the passage mainly about?

A. Modern day agricultural procedures in Cambodia.

B. A possible explanation for the, decline of a civilization.

C. The essential role water plays in farming.

D. Religious temples of the ancient Khmer Empire.

23. The passage preceding the passage most likely discusses ______.

A. architecture of ancient Asian civilization

B. religious practices of the people of Angkor

C. the form of government practiced by the Khmer Empire

D. the other six wonders of the world

24. According to the passage, Lake Tonle Sap in Cambodia ______.

A. is an enormous fresh body of water in Asia

B. was unable to supply enough fish for the people of Angkor

C. became polluted due to a population explosion

D. is one of the Seven Wonders of the World

25. Why does the author mention the hydraulic systems of the reservoirs?

A. They supplied irrigation from the Indian Ocean.

B. They became non-functional due to overuse.

C. They were destroyed by nearby warrior tribes.

D. They helped transport the sandstones for constructing temples.

26. It can be inferred from the passage that the inhabitants of the Khmer Empire ______.

A. were intentionally starved by the farmers

B. lost their food source due to excess rainfall

C. supplemented their diets with 'meat hunted in the nearby jungles

D. depended upon rice as their main source of food

27. All the following are mentioned as events that can affect food supply EXCEPT.

A. erosion of soil                                       B. contamination of soil

C. reduction of nutrients                            D. loss of water supply

16 tháng 4 2022

22-b 23-d 24-a 25-b 26-d 27-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 following questions from 1 to 5.     Most Americans look forward to their vacations. Most American employees receive an annual vacation with pay. It is traditional to use this time off for travel.    Travelling within the United States is very popular because foreign travel generally takes more time and money. However, those who want to travel outside the USA are free...
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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 following questions from 1 to 5.

     Most Americans look forward to their vacations. Most American employees receive an annual vacation with pay. It is traditional to use this time off for travel.

    Travelling within the United States is very popular because foreign travel generally takes more time and money. However, those who want to travel outside the USA are free to go almost everywhere. Obtaining a passport is not difficult. Every year about thirteen million people travel abroad. The most popular periods are during the Summer and the two-week retool break on Christmas and New Year holidays. These periods are so the most crowded and the most expensive time to travel, so people who can adjust their schedules sometimes choose to travel in the autumn.

    American tourists often travel by car. Most families own a car, and those who do not have a car can rent one. Cars are usually the most economical way to travel, especially for families. It is also fairly fast and convenient. Excellent highways with motels and restaurants nearby connect the nation's major cities. They enable tourists to travel at a speed of 55 to 66 miles an hour. Tourists that want to travel faster often fly to their destination and then rent a car when they get there.

Câu 1: According to the writer, most American employees traditionally use their annual vacations for

     A. jogging                       B. shopping                    C. travelling                  D. cycling

Câu 2: In the USA, to obtain a passport is ______.                           

     A. easy                             B. difficult                     C. expensive                 D. time consuming

Câu 3: There are many American people travelling ______.

     A. in the autumn                                                     B. on Thanksgiving

     C. on Christmas and New Year holidays               D. on Women's Day

Câu 4: How do American tourists often travel?                                

     A. By car                         B. By bicycle                 C. By bicycle                D. By plane

Câu 5: The word “They" in paragraph 3 refers to ______.

     A. restaurants                  B. highways                   C. motels                       D. major cities

1
17 tháng 10 2021

1 C

2 A

3 C

4 A

5 B

22 tháng 8 2019

Đáp án: D