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27 tháng 3 2016

1. do/listen

2.does can swim/ swims 

3.Is/sits

4.Is do/does

5.flying/land

27 tháng 3 2016

1 .are ... going to do ... are going to listen

2 . Can ... swim ... swims

3 . is ... to sit

4 . doesn't do ... does

5 . is flying .... is going to land

1 tháng 4 2016

 Peter and Bill are brothers. Peter is twelve and Bill is ten. They live with their parents and their dogs in a small town in the south of England. They do not look like each other. Peter is tall and dark and Bill is short and fair. They also like difference things. Peter likes sports but he is not interested in school. He hates Mathematics and History and he never remembers the numbers. Bill like goes to the school very much. He is quiet good at learn English, he reads and writea lot. Bill can draw very well, too. But he never plays sports. He spends most of his time indoors reading or drawing. He wants to be a writer or artist
Mình tìm được từng này lỗi sai

1 tháng 4 2016

dog giu nguyen nhe

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, "But suppose they fail to learn something essential, some­thing they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

 What does the author think teachers do which they should not do?

A. They encourage children to copy from one another

B. They point out children's mistakes to them

C. They allow children to mark their own work

D. They give children correct answers

2
30 tháng 5 2019

Đáp án B

Dịch nghĩa: Tác giả cho rằng điều gì giáo viên đang làm nhưng thực sự thì họ không nên làm?

A. Khuyến khích trẻ chép bài người khác

B. Chỉ ra lỗi sai cho lũ trẻ.

C. Cho phép trẻ tự chấm bài

D. Đưa cho trẻ đáp án đúng.

Giải thích: Thông tin nằm ở đoạn 1 “But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him”

4 tháng 2 2021

B nhé bạn

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, "But suppose they fail to learn something essential, some­thing they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

According to the first paragraph, what basic skills do children learn to do without being taught?

A. Talking, climbing and whistling

B. Reading, talking and hearing

C. Running, walking and playing

D. Talking, running and skiing

1
9 tháng 6 2019

Đáp án A

Dịch nghĩa: Theo đoạn 1, những kĩ năng cơ bản nào trẻ em không được dạy mà vẫn học được?

A. nói chuyện, leo trèo, huýt sáo                           B. đọc, nói chuyện và nghe

C. chạy, đi, chơi                                                   D. nói chuyện, chạy và trượt tuyết

Giải thích: Thông tin nằm ở đoạn 1 “In the same way, children learn all the other things they learn to do without being taught — to talk, run, climb, whistle, ride a bicycle”

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 36 to 42. FIRST TIME IN THE AIRWhen John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John."I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It...
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 36 to 42.

FIRST TIME IN THE AIR

When John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John.

"I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It drives everybody crazy."

However John couldn't avoid flying any longer. It was the only way he could visit his grandchildren in Canada.

"I had made up my mind that I was going to do it, I couldn't let my son, his wife and their three children travel all the way here to visit me. It would be so expensive for them and I know Tom's business isn't doing so well at the moment - it would also be tiring for the children - it's a nine-hour flight!" he says.

To get ready for the flight John did lots of reading about airplanes. When he booked his seat, he was told that he would be flying on a Boeing 747, which is better known as a jumbo jet. "I needed to know as much as possible before getting in that plane. I suppose it was a way of making myself feel better. The Boeing 747 is the largest passenger aircraft in the world at the moment. The first one flew on February 9th 1969 in the USA. It can carry up to 524 passengers and 3.400 pieces of luggage. The fuel for airplanes is kept in the wings and the 747's wings are so big that they can carry enough fuel for an average car to be able to travel 16,000 kilometers a year for 70 years. Isn't that unbelievable? Even though I had discovered all this very interesting information about the jumbo, when I saw it for the first time, just before I was going to travel to Canada, I still couldn't believe that something so enormous was going to get up in the air and fly. I was even more impressed when I saw how big it was inside with hundreds of people!"

The biggest surprise of all for John was the flight itself. "The take-off itself was much smoother than I expected although I was still quite scared until we were in the air. In the end, I managed to relax, enjoy the food and watch one of the movies and the view from the window was spectacular. I even managed to sleep for a while!

"Of course," continues John, "the best reward of all was when I arrived in Canada and saw my son and his family, particularly my beautiful grandchildren. Suddenly, I felt so silly about all the years when I couldn't even think of getting on a plane. I had let my fear of living stop me from seeing the people I love most in the world. I can visit my son and family as often as I like now!"

What happened when he saw the jumbo jet for the first time?

A. He felt much safer

B. He liked the shape of it.

C. He couldn't believe how big it was. 

D. He thought the wings were very small.

1
10 tháng 6 2017

ĐÁP ÁN C

Điều gì đã diễn ra khi ông ấy nhìn thấy chiếc máy bay phản lực đầu tiên?

A. Ông ấy cảm thấy an toàn hơn                B. Ông ấy thích hình dáng của nó

C. Ông ấy ngạc nhiên về độ lớn của nó      D. Ông ấy nghĩ cánh của nó rất nhỏ

Dẫn chứng: Even though I had discovered all this very interesting information about the jumbo, when I saw it for the first time, just before I was going to travel to Canada, I still couldn't believe that something so enormous was going to get up in the air and fly. I was even more impressed when I saw how big it was inside with hundreds of people!"

(Mặc dù tôi đã phát hiện ra tất cả các thông tin rất thú vị về chiếc máy bay, khi tôi thấy nó lần đầu tiên, ngay trước khi tôi đến Canada, tôi vẫn không thể tin rằng có thứ lại lớn như vậy được đưa lên không trung và bay. Tôi đã thậm chí còn ấn tượng hơn nhiều khi thấy nó có thể chứa hàng trăm người!)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, "But suppose they fail to learn something essential, some­thing they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

The word "he" in the first paragraph refers to ___________.

A. other people

B. their own work 

C. children 

D. a child

1
6 tháng 12 2019

Đáp án D

Dịch nghĩa: Từ “he” ở đoạn 1 liên quan đến __________.

A. người khác                 B. công việc của chính họ                             C. trẻ con    D. một đứa trẻ

Giải thích: Thông tin nằm ở đoạn 1 “A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. Ẹ notices a thousand times” – Một đứa trẻ học nói không phải bằng cách được chữa liên tục. Nếu bị sửa nhiều quá, nó sẽ không nói nữa. Nó nhận ra …. Như vậy, he ở đây thay cho đứa trẻ - a child.

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 36 to 42. FIRST TIME IN THE AIRWhen John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John."I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It...
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 36 to 42.

FIRST TIME IN THE AIR

When John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John.

"I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It drives everybody crazy."

However John couldn't avoid flying any longer. It was the only way he could visit his grandchildren in Canada.

"I had made up my mind that I was going to do it, I couldn't let my son, his wife and their three children travel all the way here to visit me. It would be so expensive for them and I know Tom's business isn't doing so well at the moment - it would also be tiring for the children - it's a nine-hour flight!" he says.

To get ready for the flight John did lots of reading about airplanes. When he booked his seat, he was told that he would be flying on a Boeing 747, which is better known as a jumbo jet. "I needed to know as much as possible before getting in that plane. I suppose it was a way of making myself feel better. The Boeing 747 is the largest passenger aircraft in the world at the moment. The first one flew on February 9th 1969 in the USA. It can carry up to 524 passengers and 3.400 pieces of luggage. The fuel for airplanes is kept in the wings and the 747's wings are so big that they can carry enough fuel for an average car to be able to travel 16,000 kilometers a year for 70 years. Isn't that unbelievable? Even though I had discovered all this very interesting information about the jumbo, when I saw it for the first time, just before I was going to travel to Canada, I still couldn't believe that something so enormous was going to get up in the air and fly. I was even more impressed when I saw how big it was inside with hundreds of people!"

The biggest surprise of all for John was the flight itself. "The take-off itself was much smoother than I expected although I was still quite scared until we were in the air. In the end, I managed to relax, enjoy the food and watch one of the movies and the view from the window was spectacular. I even managed to sleep for a while!

"Of course," continues John, "the best reward of all was when I arrived in Canada and saw my son and his family, particularly my beautiful grandchildren. Suddenly, I felt so silly about all the years when I couldn't even think of getting on a plane. I had let my fear of living stop me from seeing the people I love most in the world. I can visit my son and family as often as I like now!"

Why did John Mills fly in an airplane?

A. He wanted to go on holiday

B. He wanted to try it.

C. He wanted to see his family

D. He had to travel on 

1
11 tháng 2 2017

ĐÁP ÁN C

CHỦ ĐỀ PERSONAL EXPERIENCES

Tại sao ông John Mill đi máy bay?

A. Ông ấy muốn đi nghỉ.                                        B. Ông ấy muốn thử.

C.  Ông ấy muốn thăm gia đình                             D. Ông ấy phải đi công tác.

Dẫn chứng: It was the only way he could visit his grandchildren in Canada. "I had made up my mind that I was going to do it, I couldn't let my son, his wife and their three children travel all the way here to visit me. It would be so expensive for them and I know Tom's business isn't doing so well at the moment - it would also be tiring for the children - it's a nine-hour flight!" he says." (Đó là cách duy nhất ông có thể tới thăng các cháu của mình ở Canada. “Tôi đã quyết định sẽ thực hiện điều này, tôi không thể để con trai tôi, vợ và ba đứa cháu bay cả chuyến đường dài để tới thăm tôi được. Sẽ rất tốn kém và tôi biết việc kinh doanh của Tom lúc này không tốt – bọn trẻ cũng sẽ thấy mệt nữa – chuyến bay dài 9 tiếng!” ông nói)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, "But suppose they fail to learn something essential, some­thing they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

The word "complicated" in the third paragraph is closest in meaning to ___________.

A. comfortable

B. competitive 

C. complex

D. complimen

1
3 tháng 7 2017

Đáp án C

Dịch nghĩa: Từ “complicated”- phức tạp ở đoạn 3 gần nghĩa nhất __________.

A. thoải mái           B. cạnh tranh         C. phức tạp D. lời khen

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 36 to 42. FIRST TIME IN THE AIRWhen John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John."I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It...
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 36 to 42.

FIRST TIME IN THE AIR

When John Mills was going to fly in an airplane for the first time, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John.

"I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It drives everybody crazy."

However John couldn't avoid flying any longer. It was the only way he could visit his grandchildren in Canada.

"I had made up my mind that I was going to do it, I couldn't let my son, his wife and their three children travel all the way here to visit me. It would be so expensive for them and I know Tom's business isn't doing so well at the moment - it would also be tiring for the children - it's a nine-hour flight!" he says.

To get ready for the flight John did lots of reading about airplanes. When he booked his seat, he was told that he would be flying on a Boeing 747, which is better known as a jumbo jet. "I needed to know as much as possible before getting in that plane. I suppose it was a way of making myself feel better. The Boeing 747 is the largest passenger aircraft in the world at the moment. The first one flew on February 9th 1969 in the USA. It can carry up to 524 passengers and 3.400 pieces of luggage. The fuel for airplanes is kept in the wings and the 747's wings are so big that they can carry enough fuel for an average car to be able to travel 16,000 kilometers a year for 70 years. Isn't that unbelievable? Even though I had discovered all this very interesting information about the jumbo, when I saw it for the first time, just before I was going to travel to Canada, I still couldn't believe that something so enormous was going to get up in the air and fly. I was even more impressed when I saw how big it was inside with hundreds of people!"

The biggest surprise of all for John was the flight itself. "The take-off itself was much smoother than I expected although I was still quite scared until we were in the air. In the end, I managed to relax, enjoy the food and watch one of the movies and the view from the window was spectacular. I even managed to sleep for a while!

"Of course," continues John, "the best reward of all was when I arrived in Canada and saw my son and his family, particularly my beautiful grandchildren. Suddenly, I felt so silly about all the years when I couldn't even think of getting on a plane. I had let my fear of living stop me from seeing the people I love most in the world. I can visit my son and family as often as I like now!"

What does the word "which" in the paragraph refer to?

A. reading about airplanes

B. booking his seat

C. flying on a Boeing 747 

D. a Boeing 747

1
15 tháng 8 2017

ĐÁP ÁN D

Từ "which" trong đoạn văn ám chỉ _______.

A. đọc về máy bay                                   B. đặt vé

C. bay trên Boeing 747                             D. một chiếc Boeing 747

Dẫn chứng: When he booked his seat, he was told that he would be flying on a Boeing 747, which is better known as a jumbo jet. (Khi ông đặt vé, ông được thông báo rằng ông sẽ bay trên một chiếc Boeing 747, tốt hơn thì được gọi là một máy bay phản lực lớn)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, "But suppose they fail to learn something essential, some­thing they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

Exams, grades and marks should be abolished because children's progress should only be estimated by _____________.

A. parents

B. the children themselves

C. teachers

D. educated persons

1
13 tháng 8 2017

Đáp án B

Dịch nghĩa: Thi cử, điểm số, và chấm điểm nên bị bỏ đi vì sự tiến bộ của trẻ em chỉ nên được đánh giá bằng ______________.

A. cha mẹ                 B. chính những đứa trẻ         C. giáo viên     D. những người có học

Giải thích: Thông tin nằm ở đoạn 2 “let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know”