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22 tháng 9 2018

Đáp án C.
Cấu trúc bị động hai mệnh đề (bị động kép):
People think that + S+ V (quá khứ đơn) = S + to be + thought to have + PII
Dịch: Mọi người nghĩ rằng Alexander Fleming đã khám phá ra Penicillin vào nám 1928.
= C. Penicillin được cho là đã được Alexander Fleming phát hiện vào năm 1928.

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. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

The author uses Alexander Fleming as an example of ________.

A. a person who made an accidental scientific discovery 

B. one of the most famous inventors in history 

C. someone who became a millionaire from his invention 

D. a man who dedicated his life to medical science

1
30 tháng 8 2017

 

Chọn A

    Tác giả sử dụng Alexander Fleming làm ví dụ của ________.

    A. một người đã thực hiện một khám phá khoa học tình cờ

    B. một trong những nhà phát minh nổi tiếng nhất trong lịch sử

    C. một người trở thành triệu phú từ phát minh của mình

    D. một người đàn ông đã cống hiến cuộc đời mình cho khoa học y khoa

    Dẫn chứng: Scientists have also made crucial discoveries by accident when they were conducting experiments.      

    Tạm dịch: Các nhà khoa học cũng đã có những khám phá quan trọng một cách tình cờ khi họ đang tiến hành thí nghiệm.

ð 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.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

The author uses Alexander Fleming as an example of ________.

A. a person who made an accidental scientific discovery

B. one of the most famous inventors in history

C. someone who became a millionaire from his invention

D. a man who dedicated his life to medical science

1
25 tháng 2 2018

Chọn A

Tác giả sử dụng Alexander Fleming làm ví dụ về ________.

A. một người đã khám phá công trình khoa học một cách ngẫu nhiên

B. một trong những nhà phát minh nổi tiếng nhất trong lịch sử

C. một người đã trở thành một triệu phú từ phát minh của mình

D. một người đã cống hiến cuộc đời mình cho khoa học y khoa

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 28 to 34. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they...
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 from 28 to 34.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident. In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca - Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food: the microwave oven.

The author uses Alexander Fleming as an example of ________.

A. one of the most famous inventors in history

B. a person who made an accidental scientific discovery

C. someone who became a millionaire from his invention

D. a man who dedicated his life to medical science

1
28 tháng 2 2019

B

Kiến thức: đọc hiểu

Giải thích: 

Tác giả sử dụng Alexander Fleming làm ví dụ của ________.

A. một trong những nhà phát minh nổi tiếng nhất trong lịch sử

B. một người đã thực hiện một khám phá khoa học tình cờ

C. một người trở thành triệu phú từ phát minh của mình

D. một người đàn ông đã cống hiến cuộc đời mình cho khoa học y khoa

Dẫn chứng: Scientists have also made crucial discoveries by accident when they were conducting experiments.

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 28 to 34. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they...
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 from 28 to 34.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident. In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca - Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food: the microwave oven.

What does the author imply about penicillin?

A. Doctors seldom use it nowadays.

B. Some people are not affected by it.

C. It is an invaluable medical supply.

D. Mold combines with bacteria to make it.

1
13 tháng 6 2018

C

Kiến thức: đọc hiểu

Giải thích:

Tác giả có ý gì về penicillin?

A. Các bác sĩ hiếm khi sử dụng nó ngày nay.        B. Một số người không bị ảnh hưởng bởi nó.

C. Là một nguồn cung cấp y tế vô giá.      D. Khuôn kết hợp với vi khuẩn để tạo ra.

Dẫn chứng: When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades.

 Dịch bài đọc: 

Một số lượng lớn các sáng chế đòi hỏi nhiều năm nghiên cứu và phát triển gian nan trước khi chúng được hoàn thiện. Thí dụ, Thomas Edison đã phải cố gắng hơn 1.000 lần để sáng chế ra bóng đèn sáng trước khi cuối cùng cũng thành công. Lịch  sử  có  rất  nhiều  ví  dụ  khác  của  những người  cố  gắng, nhưng không thể  làm  sáng  chế trước khi họ cuối cùng đã thành công. Tuy nhiên, một số sáng chế đã đến không phải thông qua công việc khó khăn, nhưng do tình cờ.

Trong hầu hết các trường hợp, khi người nào đó vô ý phát minh ra điều gì đó, nhà phát minh đã cố gắng tạo ra một thứ khác. Ví dụ, trong những năm 1930, nhà chế tạo thuốc Roy Plunkett đã cố gắng tạo ra một chất mới có thể sử dụng để làm lạnh các vật dụng. Ông pha trộn một số hóa chất với nhau. Sau đó, ông đưa chúng vào một thùng chứa áp lực và làm mát hỗn hợp. Đến thời điểm thử nghiệm của ông đã hoàn thành, ông đã có một phát minh mới. Nó không phải là một chất mới mặc dù có thể được sử dụng cho tủ lạnh. Thay vào đó, ông đã phát minh Teflon, ngày nay được sử dụng phổ biến nhất để chế tạo các chậu và chảo không dính. Tương tự, nhiều thập kỷ trước đó, John Pemberton là một dược sĩ ở Atlanta, Georgia. Ông đã cố gắng tạo ra một loại thuốc mà mọi người có thể sử dụng bất cứ khi nào họ bị nhức đầu. Trong khi ông không thành công trong nỗ lực đó, ông đã thành công trong việc sáng tạo ra Coca-Cola, nước uống có ga nổi tiếng thế giới.

Các nhà khoa học cũng đã có những khám phá  quan trọng một cách tình cờ khi họ tiến hành các thí nghiệm. Năm 1928, Alexander Fleming phát hiện  ra  penicillin,  một  chất  kháng  sinh,  theo  cách  này.  Ông  phát  hiện  ra một  số  nấm  mốc  phát  triển  trong  một món ăn với  một  số  vi  khuẩn.  Ông  nhận  thấy  rằng  vi  khuẩn dường như tránh nấm mốc. Khi ông điều tra thêm, ông đã xác định một số tính chất hữu ích của penicillin, điều này đã cứu sống hàng triệu người trong vài thập kỷ qua. Tương tự như vậy, vào năm 1946, nhà khoa học Percy Spencer đã tiến hành thí nghiệm với lò vi sóng. Anh ta có một thanh kẹo trong túi, và anh nhận thấy nó tan chảy. Ông điều tra và học được lý do tại sao điều đó đã xảy ra. Ngay sau đó, ông đã chế tạo một thiết bị có thể sử dụng lò vi sóng để nướng thức ăn: lò vi sóng.

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.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

What does the author imply about penicillin?

A. It is an invaluable medical supply

B. Mold combines with bacteria to make it

C. Some people are not affected by it

D. Doctors seldom use it nowadays

1
31 tháng 8 2017

Chọn A

Tác giả nghĩ gì về penicillin?

A. Nó là một nguồn cung cấp y tế vô giá.

B. Nấm mốc kết hợp với vi khuẩn đã tạo nó.

C. Một số người không bị ảnh hưởng bởi nó.

D. Các bác sĩ hiếm khi sử dụng nó ngày nay.

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. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

What does the author imply about penicillin?

A. It is an invaluable medical supply.

B. Mold combines with bacteria to make it. 

C. Some people are not affected by it.

D. Doctors seldom use it nowadays.

1
10 tháng 11 2018

 

Chọn A

    Tác giả có ngụ ý gì về penicillin?

    A. Là một nguồn cung cấp y tế vô giá.

    B. Khuôn kết hợp với vi khuẩn để tạo ra.

    C. Một số người không bị ảnh hưởng bởi nó.

    D. Các bác sĩ hiếm khi sử dụng nó ngày nay.

    Dẫn chứng: When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades.

    Tạm dịch: Khi điều tra sâu hơn, ông đã xác định được một số tính chất hữu ích của penicillin, thứ đã cứu sống hàng triệu người trong vài thập kỷ qua.

    => 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.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 1, the word arduous is closest in meaning to _______.

A. constant

B. tough

C. specific

D. detailed

1
24 tháng 2 2017

Chọn B

Trong đoạn 1, từ “arduous” gần nghĩa _______.

A. liên tục

B. khó khăn

C. cụ thể

D. chi tiết

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. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 1, the word arduous is closest in meaning to _______.

A. constant

B. tough

C. specific

D. detailed

1
5 tháng 12 2017

 

Chọn B

Trong đoạn 1, từ arduous (khó nhất) có nghĩa gần nhất với

    A. constant: kiên trì

    B. tough : khó                  

    C. specific : cụ thể            

    D. detailed: chi tiết

    => 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.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
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.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 2, the word endeavor is closest in meaning to _______.

A. request

B. attempt

C. research

D. dream

1
1 tháng 9 2018

Chọn B

Trong đoạn 2, endeavor gần nghĩa _______.

A. yêu cầu

B. cố gắng

C. nghiên cứu

D. giấc mơ