SEQUENCE OF TENSES1) Linh (work) ... for three different prestigious companies since she (graduate)... from university two years ago2) when she (enroll) ... on the course, she had never studied a fore...

1. Linh has worked for three different prestigious companies since she graduated from university two years ago.2. When she enrolled on the course, she had never studied a foreign language before.3. I was very angry when I saw that my brother had eaten my apple.4. By the time I moved in, they had finished the building work.5. There have been many changes around here since I was a boy.6. Before we reached the station, we saw that we had lost our way.7. The sun shone yesterday after it had been cold for many weeks.8. Uncle David went to the doctor after he had been ill for a month.9. When I closed the door, I realized that I had left my keys inside.10. All the tickets had been sold before the concert began.Câu trả lời: 1. Linh has worked for three different prestigious companies since she graduated from university two years ago.2. When she enrolled on the course, she had never studied a foreign language before.3. I was very angry when I saw that my brother had eaten my apple.4. By the time I moved in, they had finished the building work.5. There have been many changes around here since I was a boy.6. Before we reached the station, we saw that we had lost our way.7. The sun shone yesterday after it had been cold for many weeks.8. Uncle David went to the doctor after he had been ill for a month.9. When I closed the door, I realized that I had left my keys inside.10. All the tickets had been sold before the concert began.

SEQUENCE OF TENSES1) Linh (work) ... for three different prestigious companies since she (graduate)... from university t...

Hãy tham gia nhóm Học sinh Hoc24OLM

Dương Minh

9 tháng 10 2018 lúc 6:59

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: 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.

Xem chi tiết

Lớp 11 Tiếng anh

Dương Minh

18 tháng 8 2018 lúc 3:47

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: How did John feel when the aeroplane was taking off?

A. excited

B. happy

C. sad

D. frightened

Xem chi tiết

Lớp 11 Tiếng anh

Dương Minh

30 tháng 9 2018 lúc 14:37

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: How did John feel about his fears in the end?

A. He thought he had wasted time being afraid

B. He realized it was okay to be afraid.

C. He hoped his grandchildren weren‟t afraid of flying.

D. He realized that being afraid kept him safe.

Xem chi tiết

Lớp 11 Tiếng anh

Dương Minh

27 tháng 10 2018 lúc 12:56

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: What surprised John most about the flight?

A. that he liked the food.

B. that he was able to sleep

C. that there was a movie being shown

D. that the view was good

Xem chi tiết

Lớp 11 Tiếng anh

Dương Minh

16 tháng 5 2019 lúc 13:23

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: Why did John Mills fly in an aeroplane?

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 business.

Xem chi tiết

Lớp 11 Tiếng anh

Dương Minh

21 tháng 10 2019 lúc 16:12

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.FIRST TIME IN THE AIRWhen John Mills was going to fly in an aeroplane 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 cr...

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.

FIRST TIME IN THE AIR

When John Mills was going to fly in an aeroplane 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 aeroplanes. 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 aeroplanes 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 kilometres 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!”

Question: Why did John read about aeroplane?

A. He wanted to know how they work.

B. It was his hobby.

C. It made him feel safer.

D. He had found a book on them.

Xem chi tiết

Lớp 11 Tiếng anh

nhat minh

18 tháng 7 2019 lúc 16:31

Gerund and To-infinitive1. If a thing is not worth(do) at all, it is worth(do) well.2. Im beginning (understand) what you mean.3. The boys like (play) games but hate (do) exercises.4, I cant understand her (behave)like that.5. It wouldnt be safe (start) down now, well have (wait)till the mist clears.6. I tried ( explain) to him but he refused (listen) and went on (grumble)7. She likes her children (go) to the dentist every 6 months.8. I know my hair wants (cut) but I never have time (go) to the...

Đọc tiếp

Gerund and To-infinitive
1. If a thing is not worth(do) at all, it is worth(do) well.
2. I'm beginning (understand) what you mean.
3. The boys like (play) games but hate (do) exercises.
4, I can't understand her (behave)like that.
5. It wouldn't be safe (start) down now, we'll have (wait)till the mist clears.
6. I tried ( explain) to him but he refused (listen) and went on (grumble)
7. She likes her children (go) to the dentist every 6 months.
8. I know my hair wants (cut) but I never have time (go) to the hairdresser's.
9.-Why didn't you drink it?

-] didn't like (drink) it as I didn't know what it was .
10. Did you advise him (go)to the police?

-No, I didn't like (give) any advice on such a difficult matter.
11. 1 (like) (bathe)there but there wasn't time.
12. Do stop (talk); I'm trying (finish) a letter.
13. It is usually easier (learn) a subject by (read) books than by (listen) to lectures.
14. Some people seem ( have) a passion for (write) to the newspapers.
15. I resented (bve) unjustly accused and asked him (apologise).
16. He made me (repeat) his instructions (make) sure that I understood what I was
(do) after he had gone.
17.1 keep (try) (make) mayonnaise but I never succeed.

-Try (add)the yolk of a hard-boiled egg.
18. I distinctly remember (pay) him. I gave him $2.
19. It's no good (write) to him. He never answers.
20. I knew I was not the first (arrive), for I saw smoke ( rise) from the chimney.
21. I remember (read) a review of that book and think I (like) (get) it.
22. I hate (borrow) money.
23. I (like) (photograph)it but I had no more film.
24. I (like) (ask) a questionbut I was sitting so far back that I'd be heard.
25. I can remember (be) in hospital when I was 4.
25. This book tells you how (win)at games without actually (cheat).
26. The boys next door used (like) (make) and (fly) model aeroplanes, but they
seem (stop) (do) that now.
27. Don't forget (post) the letter I gave you.
28. There was a lot of traffic but we managed (get) to the airport in time.
29. When I'm tired ,I enjoy (watch) TV. It's relaxing.
30. It was a nice day, so we decided (go) for a walk.
31. It's a nice day;Does anyone fancy (go) for a walk?
32. I'm not in a hurry. I don't mind (wait).
33. They don't have much money. They can't afford (go) out very often.
34. I wish that dog would stop (bark). It's driving me mad.
35. Our neighbour threatened (call) the police if we didn't stop the noise.
36. We were hungry, so I suggested (have) dinner early.

Xem chi tiết

Lớp 11 Tiếng anh Câu hỏi của OLM

thành

18 tháng 9 2021 lúc 14:36

I/ Put the verbs in brackets into the correct Tenses: 1/ She ( buy ) some food yesterday. 2/ I ( not be ) here last week. 3/ Mrs Wilson had an accident While she ( drive) car to work this morning. 4/ We’ll go out when it (stop) raining. 5/ My uncle (live) in the USA since last year. 6/ I saw her when I ( walk down) the street. 7/ Hurry up ! the train ( come ). 8/ Why didn’t you listen while I ( speak ) to you? 9/ Where ………. you ( spend ) your Summer holiday last year? 10/ Let’s go out. It (...

Đọc tiếp

I/ Put the verbs in brackets into the correct Tenses:

1/ She ( buy ) some food yesterday.

2/ I ( not be ) here last week.

3/ Mrs Wilson had an accident While she ( drive) car to work this morning.

4/ We’ll go out when it (stop) raining.

5/ My uncle (live) in the USA since last year.

6/ I saw her when I ( walk down) the street.

7/ Hurry up ! the train ( come ).

8/ Why didn’t you listen while I ( speak ) to you?

9/ Where ………. you ( spend ) your Summer holiday last year?

10/ Let’s go out. It ( not rain ) now.

11/ It ( not rain ) in the dry season.

12/ Up to now, I ( do ) every exercise in this book.

13/ I have been here since I ( be) ten years old.

14/ My sister always ( wash) her hands before meals.

15/ Please don’t say anything while I ( learn) my lesson.

16/ We were good friends. We (know) each other for a long time.

17/ We arrived home and found that a burglar ( break ) in.

18/ We aren’t hungry. We ( have ) Lunch.

19/ I had finished my work before ( go ) to bed.

20/ While John was reading a book, Mary ( watch ) TV.

21/ He ( return ) to his hometown recently.

22/ She ( just come ) back from Japan.

23/ Vietnam, Thailand, and Malaysia ( be ) tropical countries.

24/ ……………. Your sister ( like ) lemon juice?

25/ We ( learn ) English at the moment.

Xem chi tiết

Lớp 11 Tiếng anh

Lê Nguyễn Khánh Hưng

8 tháng 11 2021 lúc 13:47

B. Cho hình thức đúng của động từ trong ngoặc1. When we …………..(clean) our house, we …………...(break) the vase2. When she ……………(go) to the company, she ……………(phone) her boss3. After I ……………..(finish) my test, I ……………(go) home4. By the time he ………………(return) his country, he …………………( travel) to other countries with his friends.5. He admitted ………………(enter) the house but refused ………………(steal) the money.6. Children shouldn’t be allowed ……………….(watch) violent programs on TV.

Đọc tiếp

B. Cho hình thức đúng của động từ trong ngoặc

1. When we …………..(clean) our house, we …………...(break) the vase

2. When she ……………(go) to the company, she ……………(phone) her boss

3. After I ……………..(finish) my test, I ……………(go) home

4. By the time he ………………(return) his country, he …………………( travel) to other countries with his friends.

5. He admitted ………………(enter) the house but refused ………………(steal) the money.

6. Children shouldn’t be allowed ……………….(watch) violent programs on TV.

Xem chi tiết

Lớp 11 Tiếng anh

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)