câu điều kiện 1. I don’t buy it because I don’t have enough money. ----> If I ...........................................

Luyện tập tổng hợp

Huong Le Diu

18 tháng 8 2017 lúc 8:47

câu điều kiện

1. I don’t buy it because I don’t have enough money.
----> If I ........................................................................................................
2. I didn’t buy it because I didn’t have enough money.
----> I would..................................................................................................
3. There was a test yesterday. I didn’t know that, so I didn’t study for it.
----> If I ........................................................................................................
4. I’m busy right now, so I can’t help you.
----> I could...................................................................................................
5. He’s very thin, that’s why he feels the cold so much.
----> If he.......................................................................................................
6. I didn’t eat breakfast several hours ago, so I am hungry now.
----> If I..........................................................................................................
7. If John had played for our football team, we would not have lost the game.
----> Unless....................................................................................................
8. If I won a big prize in a lottery, I’d give up my job.
----> Unless....................................................................................................
9. If you don’t like this one, I’ll bring you another.
----> Unless....................................................................................................
10. I’ll only help you if you promise to try harder.
----> Unless....................................................................................................

Lớp 9 Tiếng anh Luyện tập tổng hợp

Linh Diệu

18 tháng 8 2017 lúc 9:31

câu điều kiện

1. I don’t buy it because I don’t have enough money.
----> If I had enough money, i would buy it
2. I didn’t buy it because I didn’t have enough money.
----> I would buy it if I had enough money
3. There was a test yesterday. I didn’t know that, so I didn’t study for it.
----> If I had known there was a test yesterday, i would have studied for it
4. I’m busy right now, so I can’t help you.
----> I could help you if i weren't busy right now
5. He’s very thin, that’s why he feels the cold so much.
----> If he weren't very thin, he would not feel the cold so much.
6. I didn’t eat breakfast several hours ago, so I am hungry now.
----> If I had eaten breakfast several hours ago,i wouldn't be hungry now.
7. If John had played for our football team, we would not have lost the game.
----> Unless John had played for our football team, we would have lost the game.
8. If I won a big prize in a lottery, I’d give up my job.
----> Unless I won a big prize in a lottery, I’d not give up my job.
9. If you don’t like this one, I’ll bring you another.
----> Unless you like this one, I’ll bring you another.
10. I’ll only help you if you promise to try harder.
----> Unless you promise to try harder, I’ll not help you

Đúng 0

Bình luận (0)

H24

_silverlining

18 tháng 8 2017 lúc 9:36

câu điều kiện

1. I don’t buy it because I don’t have enough money.
----> If I ....................had enough money , i would buy it....................................................................................
2. I didn’t buy it because I didn’t have enough money.
----> I would..............have bought it if i had had enough money....................................................................................
3. There was a test yesterday. I didn’t know that, so I didn’t study for it.
----> If I ....................had known that , i would have studied for it....................................................................................
4. I’m busy right now, so I can’t help you.
----> I could...............help you if i weren't busy right now....................................................................................
5. He’s very thin, that’s why he feels the cold so much.
----> If he...............weren't very thin , he wouldn't feel the cold so much........................................................................................
6. I didn’t eat breakfast several hours ago, so I am hungry now.
----> If I.................had eaten breakfast several hours ago , i wouldn't be hungry now.........................................................................................
7. If John had played for our football team, we would not have lost the game.
----> Unless..............John hadn't played for our football team , we would not have lost the game. ......................................................................................
8. If I won a big prize in a lottery, I’d give up my job.
----> Unless..........I won a big prize in a lottery, i wouldn't give up my job..........................................................................................
9. If you don’t like this one, I’ll bring you another.
----> Unless...........you like this one , i will bring you another.........................................................................................
10. I’ll only help you if you promise to try harder.
----> Unless........you promíe to try harder , i will not help you............................................................................................

Đúng 1

Bình luận (0)

Huong Le Diu

18 tháng 8 2017 lúc 9:43

thanks

Đúng 0

Bình luận (0)

Các câu hỏi tương tự

Anh Quynh

20 tháng 8 2021 lúc 8:35

Viết lại câu theo gợi ý1. I didn’t eat lunch, I feel hungry now.→ If I………………………………….2. If it hadn’t rained, we would have a better crop.→ But for………………………………………3. If you want my advice, I wouldn’t buy it.→ If I ………………………………………4. I only come if they invite me.→ Unless……………………….5. He didn’t revise all his lessons, he failed the exam.→ If he………………………………………………6. His sister sent her money, so he continued to study.→ But for…………………………………………7. The park is over there, only 5 minutes’ walk.→ If you walk…...

Đọc tiếp

Viết lại câu theo gợi ý

1. I didn’t eat lunch, I feel hungry now.
→ If I………………………………….
2. If it hadn’t rained, we would have a better crop.
→ But for………………………………………
3. If you want my advice, I wouldn’t buy it.
→ If I ………………………………………
4. I only come if they invite me.
→ Unless……………………….
5. He didn’t revise all his lessons, he failed the exam.
→ If he………………………………………………
6. His sister sent her money, so he continued to study.
→ But for…………………………………………
7. The park is over there, only 5 minutes’ walk.
→ If you walk……………………………….
8. In case it rains, we’ll stay at home
→ If it……………………………..

9. Let me give you my advice. You should cut down on smoking right now.

→ If I …………………………………………….…………………………………

10. Leave me alone or I’ll call the police.

→ Unless …………………………………………………………….…………………………………

11. If you arrive at the office earlier than I do, please turn on the airconditioner.

→ Should …………………………………………………………….…………………………………

12. The children don’t go to school in the snowy weather.

→ If it …………………………………………………………….…………………………………

13. He died so young; otherwise, he would be a famous musician by now.

→ Had …………………………………………………………….…………………………………

14. You must tell me the whole truth or I won’t help you.

→ Unless …………………………………………………………….…………………………………

15. The car breaks down so often because you don’t take good care of it.

→ Were I …………………………………………………………….…………………………………

16. He is very badtempered, that’s why his wife left him soon after marriage.

→ If he …………………………………………………………….…………………………………

17. Don’t tell lies to your boss or you’ll be fired at once.

→ If …………………………………………………………….…………………………………

18.She got married at such an early age: otherwise, she would be at university now

→ Had …………………………………………………………….…………………………………

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Anh Quynh

19 tháng 8 2021 lúc 14:39

Đọc tiếp

Viết lại câu theo gợi ý

9. Let me give you my advice. You should cut down on smoking right now.

→ If I …………………………………………….…………………………………

10. Leave me alone or I’ll call the police.

→ Unless …………………………………………………………….…………………………………

11. If you arrive at the office earlier than I do, please turn on the airconditioner.

→ Should …………………………………………………………….…………………………………

12. The children don’t go to school in the snowy weather.

→ If it …………………………………………………………….…………………………………

13. He died so young; otherwise, he would be a famous musician by now.

→ Had …………………………………………………………….…………………………………

14. You must tell me the whole truth or I won’t help you.

→ Unless …………………………………………………………….…………………………………

15. The car breaks down so often because you don’t take good care of it.

→ Were I …………………………………………………………….…………………………………

16. He is very badtempered, that’s why his wife left him soon after marriage.

→ If he …………………………………………………………….…………………………………

17. Don’t tell lies to your boss or you’ll be fired at once.

→ If …………………………………………………………….…………………………………

18.She got married at such an early age: otherwise, she would be at university now

→ Had …………………………………………………………….…………………………………

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Doãn Oanh

13 tháng 3 2021 lúc 18:42

1, I dont buy it because I dont have enough mony-- If I2,I am busy now, so I cant help you-- If3, There will be a shortage of water unless it rains-- If 4, John is fat because she eat many chips-- If she5, Ill only help you if you promise to try harder-- Unless6, If I doesnt rain soon , the crops will be lost-- Unless7, I am very tired so I cant concertrate properly-- If8, We dont have a garden, so we dont grow our own vegetables-- If9,He doesnt give you good advice because he isnt your true fri...

Đọc tiếp

1, I don't buy it because I don't have enough mony

--> If I

2,I am busy now, so I can't help you

--> If

3, There will be a shortage of water unless it rains

--> If

4, John is fat because she eat many chips

--> If she

5, I'll only help you if you promise to try harder

--> Unless

6, If I doesn't rain soon , the crops will be lost

--> Unless

7, I am very tired so I can't concertrate properly

--> If

8, We don't have a garden, so we don't grow our own vegetables

--> If

9,He doesn't give you good advice because he isn't your true friend

--> If

10, We come late because the rain is so heavy

--> If

11, You don't get better marks because you don't study harder

--> If

12, She is very busy so she can't go out tonight

--> If

13, I don't know anything about her background, so I can't tell you

--> If

14, I wasn't hungry so I didn't feel like eating

--> If

15, She's so shy, that why she doesn't have many friends

--> If

16, I remembered Susan's birthday only because you reminded me about it

--> If

17, The car in front stopped so suddenly, so I crashed into its back

--> If

18, They painted the wall brown, that's why the house looked very dark

--> If

19, My brother will have enough money. He will buy a bicycle

--> If

20, I'll buy a new hat. I'll give it to you

--> If

21, You'll ask the teacher. He'll explain the lesson to you

--> If

22, I don't have enough money. I can't go on a long holiday this year

--> If

23, I don't haave a typewriter. I can't type it myself

--> If

24, I don't live in a big city, so I can't go to the cinema very often

--> If

25, Lan doesn't have a bike, she walk to school

--> If

26, He didn't hungry, so he missed the rain

--> If

27, We canceled our picnic because it rained very hard yesterday

--> If

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Nguyễn Thị Vinh

27 tháng 8 2021 lúc 21:13

I wasn’t to buy the books I wanted because I didn’t have enough money with

=> If I.......

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

H24

HoàngIsChill

22 tháng 8 2021 lúc 9:57

I. Add so or but.1. The room was dark, ______ I turned on a light.2. I didn’t have an umbrella, ______ I didn’t get wet because I was wearing my raincoat.3. Al didn’t study, ______ he failed the test.4. I had a lot of studying to do, ______ I went to a movie anyway.5. My friend lied to me, ______ I still like and trust her.6. The weather was bad, ______ we postponed our trip.7. My watch is broken, ______ I was late for my job interview.8. Bob ate a l...

Đọc tiếp

I. Add so or but.

1. The room was dark, ______ I turned on a light.

2. I didn’t have an umbrella, ______ I didn’t get wet because I was wearing my raincoat.

3. Al didn’t study, ______ he failed the test.

4. I had a lot of studying to do, ______ I went to a movie anyway.

5. My friend lied to me, ______ I still like and trust her.

6. The weather was bad, ______ we postponed our trip.

7. My watch is broken, ______ I was late for my job interview.

8. Bob ate a large dinner, ______ he is still hungry.

9. You lied to me, ______ I don’t trust you anymore.

10. I was very sleepy, ______ I finished all my homework anyway.

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

H24

Trần

10 tháng 12 2017 lúc 20:30

Câu điều kiện. 1. Nam is so fat because he eats so much chocolates. _If Nam... 2. We dont go on the trip because the weather is bad. _ If the weather.. 3. They dont go to the concert because they have an E test. _ If they... 4. He cant have the picnic because it is raining. _ If it... 5. It rained yesterday, so we didn t play soccer. _ If it... 6. He ate a lot of chocolates, so he was very fat. _ If he... 7. They got up late, so they were late for work. _ If they.... 8. Susan...

Đọc tiếp

Câu điều kiện.

1. Nam is so fat because he eats so much chocolates.

_If Nam...

2. We dont go on the trip because the weather is bad.

_ If the weather..

3. They don't go to the concert because they have an E test.

_ If they...

4. He can't have the picnic because it is raining.

_ If it...

5. It rained yesterday, so we didn' t play soccer.

_ If it...

6. He ate a lot of chocolates, so he was very fat.

_ If he...

7. They got up late, so they were late for work.

_ If they....

8. Susan felf sick because she ate four cream cakes.

_ If Susan...

9. You can't visit Moscow unless you get a visa.

_ If you...

10. He doesn't get any information because he doesn't phone immediately.

_ If he....

11. Given fair warning, I could have avoided that date

_ If you had told me...

12. He couldn't drive his car because he had no driving licence.

_ If he...

13. I sugguest that you look for another job.

_ If I...

14. He lost his money simply because he wasn' t careful

_ If he...

15. I haven't much money, I can't buy any new clothes.

_ If I..

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Chucheo Mon

14 tháng 10 2018 lúc 9:29

Giúp mình gấp với! 1. A lot of people ( kill ) by AIDS recently. And I wish nobody ( die ) any more 2. If you ( not smoke ) so much, you wouldnt have such a bad cough 3. It ( be ) such a difficult question that they ( not answer ) it yesterday 4. Lan ( visit ) Sai Gon Water Park if she lived in HCM City 5. She wishes she ( not punish ) yesterday 6. It ( take ) me thirty minutes ( walk ) to school every day last week 7. Yesterday he ( go ) to the cinema after he ( finish ) his homework 8....

Đọc tiếp

Giúp mình gấp với!

1. A lot of people ( kill ) by AIDS recently. And I wish nobody ( die ) any more

2. If you ( not smoke ) so much, you wouldn't have such a bad cough

3. It ( be ) such a difficult question that they ( not answer ) it yesterday

4. Lan ( visit ) Sai Gon Water Park if she lived in HCM City

5. She wishes she ( not punish ) yesterday

6. It ( take ) me thirty minutes ( walk ) to school every day last week

7. Yesterday he ( go ) to the cinema after he ( finish ) his homework

8. When Miss Brown ( look ) out, she ( see ) the children ( play ) near the pool

9. Someone ( make ) coffee when I walked into the kitchen

10. They ( send ) the money before they leave

11. A football match ( divide ) into two equal part of forty - five minutes each

12. What you ( do ) if I hadn't lent you the money?

13. If only I ( have ) money, I ( lend ) you some

14. Although we ( be ) in this village for a year so far, we ( not know ) many people yet, but by next door neighbors ( be ) very helpful when we first ( move )

15. He is going to have his house ( rebuild )

16. If I finish my research before Friday, I ( send ) it to my teacher

17. I think that if I learn enough vocabulary, I ( not have ) any trouble using English

18. If you ( not eat ) breakfast tomorrow morning, you will get hungry during class

19. Sally would answer the phone if she ( be ) in her office right now

20. If I had enough time now, I ( write ) to my parents

21. I wouldn't get wet if I ( remember ) to take my umbrella with me

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

nguyễn thuỳ linh

19 tháng 11 2021 lúc 14:18

Loan didn’t ask him, so he didn’t tell her. Khoa went slowly, so he didn’t catch the bus. He was ill, so he was absent yesterday. It rained too heavily, so I went to school late I couldn’t look the word up because I hadn’t got a dictionary. I didn’t make any mistakes. I passed my test. I didn’t like her, so I didn’t come to her party. Phuong was busy. She didn’t visit me yesterday. He didn’t have money. He didn’t buy her a gift. Mr. Brown drove too fast, so the ac...

Đọc tiếp

Loan didn’t ask him, so he didn’t tell her.

Khoa went slowly, so he didn’t catch the bus.

He was ill, so he was absent yesterday.

It rained too heavily, so I went to school late

I couldn’t look the word up because I hadn’t got a dictionary.

I didn’t make any mistakes. I passed my test.

I didn’t like her, so I didn’t come to her party.

Phuong was busy. She didn’t visit me yesterday.

He didn’t have money. He didn’t buy her a gift.

Mr. Brown drove too fast, so the accident happened

I didn’t buy a new car because I didn’t have enough money.

John felt better because he gave up smoking.

Unfortunately, I didn’t have an umbrella and so I got very wet in the rain.

Because I didn’t know how difficult it was, I took the job.

I worked a lot so I couldn’t meet you.

I didn’t set the alarm clock for 6 o’clock, so I got up so late.

John was lazy. He didn’t pass the exam.

John was late for work because his car broke down.

Carol didn’t answer the phone because she was studying.

I was sick yesterday, so I didn’t go to class

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Lê Đỗ Nhật Linh

25 tháng 7 2018 lúc 11:34

I/ Correct the verb form : 1. If you are hungry, I (make) you something to eat. 2. If I see Mark, I (invite) him out for dinner 3. I’ll visit Nga if I (go) to Ha Noi. 4. If she (ask) me,I’ll help her. 5. If you (not get) to bed now, you can’t get up early tomorrow morning. 6. I don’t think I will join you if it (keep) raining like this. 7. I (not take) the bus if it is too late. 8. If you go on playing truant, the teacher (not let) you sit the final exam. 9. If I (see) Tom, I will tell...

Đọc tiếp

I/ Correct the verb form :

1. If you are hungry, I (make) you something to eat.

2. If I see Mark, I (invite) him out for dinner

3. I’ll visit Nga if I (go) to Ha Noi.

4. If she (ask) me,I’ll help her.

5. If you (not get) to bed now, you can’t get up early tomorrow morning.

6. I don’t think I will join you if it (keep) raining like this.

7. I (not take) the bus if it is too late.

8. If you go on playing truant, the teacher (not let) you sit the final exam.

9. If I (see) Tom, I will tell him.

10. Cats could fly if they (have) wings.

11. If Lan (study) harder,She would get better mark.

12. you will be late for class if you (not hurry).

13. If today (be) a holiday, I would stay in bed all day.

14. If he (enjoy) concert why doesn’t he come with us?

15. If she (make) him change his mind, she would save him a lot of troubles.

16.If you ( go) away, please write to me.

17. If you ( be) in, I should have given it to you.

18. If he (eat) another cake, he will be sick.

19. I ( not do ) that if I (be) you.

20. If he (take) my advice, everything can go well.

21. I would have come sooner if I ( know) you were here.

22. He never does homework. If he ( do) his homework, he (not worry) abouthis examination.

23.It’s too bad we lost the game. If you (play) for us, we( win).24.What you (do) if she refuses your invitation?

25. If today (be) Sunday, we (go) to the beach.

26. Unless they (pass) their examinations, they would join the army.

27. You (be) ill if you drink that water.

28. If Tom (go) to bed earlier, he would not be so tired.

29. Had we known your address, we( write) you a letter.

30. If it’s raining heavily, we (not go) for a donkey ride.

31. If he (try) hard, he’ll pass the axamination.

32. I could understand the French teacher if she (speak) more slowly.

33.If she (not be) busy, she would have come to the party.

34. If I (finish) the work in time, I ( go) to the football game.

35. If you( see) Mary today, please ( ask) her to call me.

II/ Rewrite sentences so that the meaning stay the same.

1. I don’t buy it because I don’t have enough money

If I _________________________________________________________

1. I don’t buy it because I don’t have enough money

If I _________________________________________________________

2. I am busy now, so I can’t help you

If I _________________________________________________________

3. There will be a shortage of water unless it rains

If ___________________________________________________________

4. John is fat because she eat many chips

If she ________________________________________________________

5. I’ll only help you if you promise to try harder

Unless _______________________________________________________

6. If it doesn’t rain soon, the crops will be lost

Unless _______________________________________________________

7. I am very tired so I can’t concentrate properly.

If ___________________________________________________________

8.We don’t have a garden, so we don’t grow our own vegetables.

If ___________________________________________________________

9.He doesn’t give you good advice because he isn’t your true friend.

If ___________________________________________________________

10.We come late because the rain is so heavy.

If ___________________________________________________________

11.You don’t get better marks because you don’t study harder.

If _____________________________________________________________

12.She is very busy so she can’t go out tonight.

If _____________________________________________________________

13.I don’t know anything about her background, so I can’t tell you.

If ______________________________________________________________

14. I wasn’t hungry so I didn’t feel like eating.

If _____________________________________________________________

15. She’s so shy, that why she doesn’t have many friends.

If ______________________________________________________________

16. I remembered Susan’s birthday only because you reminded me about it.

If ________________________________________________________________

17. The car in front stopped so suddenly, so I crashed into its back.

If _________________________________________________________________

18. They painted the wall brown; that’s why the house looked very dark.

If ________________________________________________________________

Conditional Sentence Type I :

1/ My brother will have enough money. He will buy a bicycle.

If ___________________________________________________________

2/ I’ll buy a new hat. I’ll give it to you.

If ___________________________________________________________

3/ You’ll ask the teacher. He’ll explain the lesson to you.

If ___________________________________________________________

Conditional Sentence Type II :

1/ I don’t have enough money. I can’t go on a long holiday this year.

If ___________________________________________________________

2/ I don’t have a typewriter. I can’t type it myself.

____________________________________________________________

3.I don't live in a big city, so I can't go to the cinema very often.

If ______________________________________________________________________

4. Lan doesn’t have a bike, she walk to school.

If ______________________________________________________________________

Conditional Sentence Type III:

1. He didn’t hurry, so he missed the train.

-> If_____________________________________________________________

2. We canceled our picnic because it rained very hard yesterday.

-> If_____________________________________________________________

Choose the best anawer

He’ll go with us __ it rains Life will be destroyed __ all our sources

a. as long as b. unless c. if d. whether

__ we can find new sources of energy,our life come to an end

a. unless b. when c. if d. b or c

___ you phone me when you come to England?

A. do b. have c. will d. would

Unless we hurry,we’ll __ the bus

a. miss b. remember c. catch d. get in

If you stay up late the previous night,you ___ sleepy the next morning a. feel b. t feel c. feels d. will feel Will you go to see the doctor if you ___ a headache?

A. has b. will have c. having d. have

Unless you ___ smoking your health won’t get worse

a. cntinue b. continued c. are countinuing d. will continue

He won’t speak English ___ he goes to England

a. when b. if c. unless d. which

If you aren’t carefylly,you will ___ it

a. spoiling b. spoil c. be spoiled d. to spoil

If Mrs Laura Taylor ____ 5 years younger,she would walk round

a. was b. is c. had been d. were

If you ___ hard,you will pass the exam

a. study b. studied c. will study d. would study

He will not learn much ___ he work harder

a. if b. unless c. as d. because

If I were him I ___ smoking

a. will stop b. stopped c. would stop d. shall stop

15. If he ___ early,he’d get to work on time

a. got up b. gets up c. get up d. has got up

16. ____you ____your dinner if your mother was will?

a. will …cook b. will cook c. would cook d. would … cook

17. I’d tell you if I ___ the answer

a. know b. knows c. knew d. will have known

18. If we had more time,we _____ for a picnic

a. will go b. would go c. went d. will have gone

19. What ___you ___ if your father gave you $200?

A. will …buy b. will buy c. would … buy d. would buy

20. If you ____ ,you be late

a. not hurry b. won’t hurry c. doesn’t hurry d. don’t hurry

21. What ____ if he fell ill?

A. would happen b. will happen c. shall happen d. happened

22. If John ___ to his home town,he would visit his mother

a. go b. has gone c. went d. had gone

23. If she ___ here now,she could give us some advices

a. a. is b. was c. were d. has been

24. I ___ not loose my way if I ___ you

a. would/was b. would/were c. will/am d. will/was

25. ____ I came,she was learning

a. when b. if c. because d. as soon as

26. I ____ not be late for class if I ____ you

a. would/was b. would /were c. will/am d. will/was

27. If I were you,I would ____ her

a. marry b. to marry c. married d. marrying

28. You ____ the exam unless you study hard

a. will fail b. would fail c. will pass d. would pass

29. If it ____ , I shall take an umnrella with me

a. rain b. rains c. to rain d. rained

30. I ____ be able to give you the answer if you asked me tomorrow

a. would b. will c. should d. might

31. If I ____ the teacher,I would give an easier test

a. was b. were c. is d. am

32. If I were you,I ____ visit them without an invitation

a. won’t b. hadn’t c. don’t d. wouldn’t

33. If you want ___ there before dark,you should start at one

a. get b. to get c. getting d. got

34. Ask him ____ in don’t keep him standing at the door

a. come b. came c. to come d. coming

35. I don’t know him but he looks as if he _____ be his brother

a. can b. could c. would d. should

36. If it ____ fine,I shall go out

a. was b. will be c. is d. were

37. If you look hard enough,you ____ it

a. will find b. will be finding c. are finding d. found

Xem chi tiết

Lớp 9 Tiếng anh Luyện tập tổng hợp

Luyện tập tổng hợp

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)

Luyện tập tổng hợp

Câu hỏi

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)