Chọn một phương án đúng A, B, C hoặc D ứng với từ hoặc cụm từ thích hợp để hoàn thành các câu sau.1. Email can be sent a...

Hãy tham gia nhóm Học sinh Hoc24OLM

H24

quỳnhbébỏng

22 tháng 10 2021 lúc 19:52

Chọn một phương án đúng A, B, C hoặc D ứng với từ hoặc cụm từ thích hợp để hoàn thành các câu sau.1. Email can be sent and received at any hour of the day,_____?A. can they B. can’t it C. can it D. can’t they2. The children ________ have much free time often go swimming on Sundays.A. whom B. whose C. which D. who3. Paula loves chocolate des...

Đọc tiếp

Chọn một phương án đúng A, B, C hoặc D ứng với từ hoặc cụm từ thích hợp để hoàn thành các câu sau.

1. Email can be sent and received at any hour of the day,_____?

A. can they B. can’t it C. can it D. can’t they

2. The children ________ have much free time often go swimming on Sundays.

A. whom B. whose C. which D. who

3. Paula loves chocolate desserts and ______.

A. neither do I B. so do I C. I don’t, either D. I am, too

4. Can you ______ me a favor?

A. make B. do C. take D. bring

5. Mr. Brown is very rich. He ______ work hard for a living.

A. shouldn’t B. can’t C. mustn’t D. doesn’t have to

6. He couldn’t meet his idol ______he got stuck in a traffic jam.

A. because B. or C. so D. therefore

7. It usually rains______ in the mountains than in the lowlands.

A. more heavy B. heavier C. more heavily D. heavily

8. My sister gave up the idea of becoming a teacher because she realized she wasn’t ______for the job.

A. enough patient B. patient enough C. so patient D. such patient

9. I ______me to school every day.

A. have my sister taken B. have my sister take

C. get my sister taken D. get my sister taken

10. I have just bought a(n)______ book.

A. blue new interesting English B. interesting new blue English

C. interesting new English blue D. English blue interesting new

11. How much time do you spend _______ the web a day.

A. surfing B. going C. traveling D. playing

12. It’s really dangerous. She is always forgetting to ______ the gas stove.

A. go on B. turn off C. put on D. get over

Xem chi tiết

Lớp 9 Tiếng anh

H24

quỳnhbébỏng

22 tháng 10 2021 lúc 20:38

Chọn một phương án đúng A, B, C hoặc D ứng với từ hoặc cụm từ thích hợp để hoàn thành các câu sau. 1. Most children have the freedom to do what they want, _________?A. don’t they B. haven’t they C. haven’t you D. don’t you2. Peter works for a company________ makes computers.A. which B. who C. whom D. whose3. Lan stayed up late to study for the coming exam las...

Đọc tiếp

Chọn một phương án đúng A, B, C hoặc D ứng với từ hoặc cụm từ thích hợp để hoàn thành các câu sau.

1. Most children have the freedom to do what they want, _________?

A. don’t they B. haven’t they C. haven’t you D. don’t you

2. Peter works for a company________ makes computers.

A. which B. who C. whom D. whose

3. Lan stayed up late to study for the coming exam last night and I did, ______.

A. too B. neither C. either D. so

4. When the teacher _______ the classroom, all the students stood up.

A. came B. arrived C. went D. entered

5. According to school’s regulations, students ________ run or be noisy in the school building.

A. shouldn’t B. mustn’t C. needn’t D. won’t

6. We stay home these days ___________ we want to prevent corona virus.

A. so B. but C. although D. because

7. Tom works ______ than he used to.

A. hard B. harder C. hardly D. more hardly

8. He is _______ to see that film.

A. not enough old B. old not enough C. enough not old D. not old enough

9. Next summer, we’re_______ in this area.

A. getting a new house be built B. getting a new house built

C. having a new house build D. having a new house to build

10. I’ve just bought a_________ .

A. big new tea wooden table B. big new wooden tea table

C. tea new wooden big table D. new wooden big tea table

11. Our main objective is to ______ educational standards.

A. avoid B. enjoy C. make D. improve

12 . Tom didn’t join us today because he had to ___________ his mother in the hospital.

A. look for B. look up C. look after D. look down

Xem chi tiết

Lớp 9 Tiếng anh

MB

•Mïn•Armÿ-Blïnk

15 tháng 6 2019 lúc 10:59

Choose the best answer from the four options given (A, B,C, or D) to complete each sentence. 6. Lan wishes she _________a long vacation.A. has B. had C. have D. having7. He saw that film _________7.00 p.m _________Sunday. A. on-from B. in-at C. at-at D. at-on8. You like watching sports, _________, Peter? A. do you B. aren’t you C. don’t you D. doesn’t he9. You shouldn’t eat_________. It’s not good for your health. A. quick B. quickly C. fastly D. slow10. Minh got wet _________he forgot his umbre...

Đọc tiếp

Choose the best answer from the four options given (A, B,C, or D) to complete each sentence.
6. Lan wishes she _________a long vacation.
A. has B. had C. have D. having
7. He saw that film _________7.00 p.m _________Sunday.
A. on-from B. in-at C. at-at D. at-on
8. You like watching sports, _________, Peter?
A. do you B. aren’t you C. don’t you D. doesn’t he
9. You shouldn’t eat_________. It’s not good for your health.
A. quick B. quickly C. fastly D. slow
10. Minh got wet _________he forgot his umbrella.
A. so B. because C. and D. therefore
11. The girl _________is standing near the window is my sister.
A. who B. when C. where D. in which
12. We _________Nam since he left school.
A. met B. meet C. meeting D. haven’t met
13. Do you mind_________me home?
A. taking B. take C. took D. to take
14. This building_________in 1980.
A. built B. builds C. was built D. is built
15. She asked me_________ at English.
A. if I was good B. if was I good C. if I good D. if I am good
16. If you_________your passport, you will be in trouble.
A. lost B. lose C. would lose D. losing
17. What’s the name of the man_________gave us a gift?
A. he B. which C. who D. whose
18. The librarian asked us_________so much noise.
A. not to make B. no make C. not making D. don’t make

19. We have lived in this flat_________five years.
A. ago B. for C. since D. already
20. I really enjoyed the disco. It was great, _________?
A. isn’t it B. is it C. wasn’t it D. weren’t it

Xem chi tiết

Lớp 9 Tiếng anh Câu hỏi của OLM

MB

•Mïn•Armÿ-Blïnk

15 tháng 6 2019 lúc 10:47

Choose the word whose underlined part is pronounced differently from the others. 1. A. thank B. they C. these D. than2. A. walks B. cups C. students D. pens3. A. talked B. watched C. lived D. stopped4. A. stream B. leather C. cream D. dream5. A. striped B. slice C. diet D. recipeChoose the best answer from the four options given (A, B,C, or D) to complete each sentence. 6. Lan wishes she _________a long vacation.A. has B. had C. have D. having7. He saw that film _________7.00 p.m _________Sunday...

Đọc tiếp

Choose the word whose underlined part is pronounced differently from the others.
1. A. thank B. they C. these D. than
2. A. walks B. cups C. students D. pens
3. A. talked B. watched C. lived D. stopped
4. A. stream B. leather C. cream D. dream
5. A. striped B. slice C. diet D. recipe

Choose the best answer from the four options given (A, B,C, or D) to complete each sentence.
6. Lan wishes she _________a long vacation.
A. has B. had C. have D. having
7. He saw that film _________7.00 p.m _________Sunday.
A. on-from B. in-at C. at-at D. at-on
8. You like watching sports, _________, Peter?
A. do you B. aren’t you C. don’t you D. doesn’t he
9. You shouldn’t eat_________. It’s not good for your health.
A. quick B. quickly C. fastly D. slow
10. Minh got wet _________he forgot his umbrella.
A. so B. because C. and D. therefore
11. The girl _________is standing near the window is my sister.
A. who B. when C. where D. in which
12. We _________Nam since he left school.
A. met B. meet C. meeting D. haven’t met
13. Do you mind_________me home?
A. taking B. take C. took D. to take
14. This building_________in 1980.
A. built B. builds C. was built D. is built
15. She asked me_________ at English.
A. if I was good B. if was I good C. if I good D. if I am good
16. If you_________your passport, you will be in trouble.
A. lost B. lose C. would lose D. losing
17. What’s the name of the man_________gave us a gift?
A. he B. which C. who D. whose
18. The librarian asked us_________so much noise.
A. not to make B. no make C. not making D. don’t make

19. We have lived in this flat_________five years.
A. ago B. for C. since D. already
20. I really enjoyed the disco. It was great, _________?
A. isn’t it B. is it C. wasn’t it D. weren’t it

Nhanh nhé ! Tối nay , tớ học thêm rồi !

Xem chi tiết

Lớp 9 Tiếng anh Câu hỏi của OLM

MB

•Mïn•Armÿ-Blïnk

15 tháng 6 2019 lúc 10:49

Choose the word whose underlined part is pronounced differently from the others. 1. A. thank B. they C. these D. than2. A. walks B. cups C. students D. pens3. A. talked B. watched C. lived D. stopped4. A. stream B. leather C. cream D. dream5. A. striped B. slice C. diet D. recipeChoose the best answer from the four options given (A, B,C, or D) to complete each sentence. 6. Lan wishes she _________a long vacation.A. has B. had C. have D. having7. He saw that film _________7.00 p.m _________Sunday...

Đọc tiếp

Choose the word whose underlined part is pronounced differently from the others.
1. A. thank B. they C. these D. than
2. A. walks B. cups C. students D. pens
3. A. talked B. watched C. lived D. stopped
4. A. stream B. leather C. cream D. dream
5. A. striped B. slice C. diet D. recipe

Choose the best answer from the four options given (A, B,C, or D) to complete each sentence.
6. Lan wishes she _________a long vacation.
A. has B. had C. have D. having
7. He saw that film _________7.00 p.m _________Sunday.
A. on-from B. in-at C. at-at D. at-on
8. You like watching sports, _________, Peter?
A. do you B. aren’t you C. don’t you D. doesn’t he
9. You shouldn’t eat_________. It’s not good for your health.
A. quick B. quickly C. fastly D. slow
10. Minh got wet _________he forgot his umbrella.
A. so B. because C. and D. therefore
11. The girl _________is standing near the window is my sister.
A. who B. when C. where D. in which
12. We _________Nam since he left school.
A. met B. meet C. meeting D. haven’t met
13. Do you mind_________me home?
A. taking B. take C. took D. to take
14. This building_________in 1980.
A. built B. builds C. was built D. is built
15. She asked me_________ at English.
A. if I was good B. if was I good C. if I good D. if I am good
16. If you_________your passport, you will be in trouble.
A. lost B. lose C. would lose D. losing
17. What’s the name of the man_________gave us a gift?
A. he B. which C. who D. whose
18. The librarian asked us_________so much noise.
A. not to make B. no make C. not making D. don’t make

19. We have lived in this flat_________five years.
A. ago B. for C. since D. already
20. I really enjoyed the disco. It was great, _________?
A. isn’t it B. is it C. wasn’t it D. weren’t it

Xem chi tiết

Lớp 9 Tiếng anh Câu hỏi của OLM

VA

Vân Anh

21 tháng 4 2020 lúc 14:44

I. Choose the word / phrase (A, B, C or D) that best fits the space in each sentence.1. Tornadoes can suck up anything ________ is in their path.A. what B. who C. that D. where2. When the shaking first started, Yuki thought that it ______ just another standard aftershock.A. is B. will be C. has D. was3. I couldn’t sleep _______________________ very tired.A. despite I was B. in spite of I was C. because of D. although I was4. The weather _______________ for tomorrow is very worrying.A. news B. fo...

Đọc tiếp

I. Choose the word / phrase (A, B, C or D) that best fits the space in each sentence.
1. Tornadoes can suck up anything ________ is in their path.
A. what B. who C. that D. where
2. When the shaking first started, Yuki thought that it ______ just another standard aftershock.
A. is B. will be C. has D. was
3. I couldn’t sleep _______________________ very tired.
A. despite I was B. in spite of I was C. because of D. although I was
4. The weather _______________ for tomorrow is very worrying.
A. news B. foresee C. forecast D. foreman
5. He is always polite and _________________ towards his employees.
A. priority B. composes C. nominates D. considerate
6. Those buckets must be filled _______________ water for future use.
A. into B. on C. with D. by
7. Mary:” I’d like to congratulate you on your drawing, Tom! “  Tom: ________________
A. Yes, I think so C. It’s very good. B. Thanks, it’s O.K D. It’s very nice of you to say so
8. Tet is a festival which occurs ________ late January or early February.
A. at B. from C. on D. in
9. Scientists can usually ________ when a volcano will erupt.
A. mean B. estimate C. report D. predict
10. He is famous for his _________ . He is very helpful to those less fortunate than himself.
A. kind B. unkind C. kindly D. kindness
11. After a while Yuki realized that something __________ wrong once the shaking did not stop.
A. is B. has been C. was D. will be
12. Tet is a festival which _______________________in late January or early February.
A. holds B. celebrates C. decorates D. occurs
13. In Australia, a 120-km tropical storm is known as a ______________________.
A. hurricane B. tornado C. cyclone D. typhoon
14. Passover is celebrated by ____________________people.
A. English B. Vietnamese C. Japanese D. Jewish
15. Auld Lang Syne is a song ____________________is sung on New Year’s Eve.
A. when B. which C. where D. it
16. ______________Mr Pike is old and weak, he goes jogging every day.
A. Therefore B. Because C. Although D. However
17. Most earthquakes occur ____________________the Pacific Rim.
A. along B. around C. through D. over
18. His sense of humor distinguishes him _____________________others.
A. among B. between C. from D. with
19. “I suggest going to the seaside on the weekend.” – “_____________________.”
A. That’s a reason B. That’s a trip C. That’s a fine day D. That’s a good idea
20. Many people were injured when the building ______________ .
A. collapsed B. destroyed C. struck D. erupt
21. We will arrive ________ the morning of the sixth.
A. in B. for C. on D. at
22. Tuan was an effective ____ in that volunteer program. He spent his free time heping people.
A. active B. activist C. actor D. activity
23. The ___________ of the volcano was a terrible disaster .
A. prediction B. eruption C. cyclone D. shift
24. Thank you for your donation. It was very generous________________ you.
A. in B. at C. since D. of
25. Are they preparing for a military _________ to celebrate National Day?
A. parade B. celebration C. exhibition D. nomination
26. When tropical storm reaches 120 kilometers per hour, it is called a ___________ in America.
A. cyclone B. hurricane C. tornado D. typhoon
27. They went on walking _____________ it started to rain heavily.
A. so B. though C. because D. despite
28. The women and animals _____________ you saw on TV were from China.
A. that B. which C. whom D. who
29. “Thank you very much for that!” - “_______________.”
A. of course B. thank you C. I don’t mind D. Not at all
30. Let me congratulate you ______________ your nomination.
A. about B. for C. with D. on

31. ___________ Easter Day , many children and adults enjoy painting eggs.
A. On B. At C. During D. In
32. My friend Nigel, _____________ works in the City Bank, earns much more than I do.
A. that B. which C. who D. whose
33. “I suggest going to London for the weekend.”
A. That‘s fine day B. That‘s a good idea. C. That’s a trip. D. That‘s reason.
34. ________________ the man felt very tired, he did not stop working.
A. Though B. Because C. If D. Despite
35. ___________ a sudden shaking of the earth's surface that often causes a lot of damage.
A. Earthquake B. Tidal wave C. Typhoon D. Tornado
36. I think that nothing is more precious than __________________.
A. acquaintance B. parade C. damage D. freedom
37. Easter is a joyful festival which ____________ in late March or early April.
A. celebrates B. holds C. organizes D. occurs
38. Hurricane Andrew, _____swept through southern Florida in 1992, killed 41 people.
A. which B. that C. who D. both A and B
39. “That’s a delicious cake, my daughter.” “Thanks, Mom._____________.”
A. I’m a clever girl. B. Well done. C. It is very kind of you to say so. D. Yes, of course

Xem chi tiết

Lớp 9 Tiếng anh Câu hỏi của OLM

NP

Nguyên Anh Phạm

27 tháng 12 2021 lúc 20:06

XXIII. Choose the sentence which is different in tone. Circle A, B or C.1. A. Women can do everything? B. Men can’t do what women can? C. Men and women are equal.2. A. I agree with you. B. You don’t agree with me? C. Do you agree with me?3. A. Men should do housework. B. Men shouldn’t do housework. C. Men shouldn’t do housework?4. A. Can women work as pilots? B. Women can’t work as pilot? C. Women pilots?5...

Đọc tiếp

XXIII. Choose the sentence which is different in tone. Circle A, B or C.

1. A. Women can do everything?            B. Men can’t do what women can?            C. Men and women are equal.
2. A. I agree with you.           B. You don’t agree with me?      C. Do you agree with me?
3. A. Men should do housework.             B. Men shouldn’t do housework.               C. Men shouldn’t do housework?
4. A. Can women work as pilots?              B. Women can’t work as pilot?              C. Women pilots?
5. A. My father is the breadwinner.                                      B. Who is the breadwinner in your family?

C. You are the breadwinner in the family.

Xem chi tiết

Lớp 9 Tiếng anh

NP

Nguyên Anh Phạm

28 tháng 12 2021 lúc 11:35

XXIII. Choose the sentence which is different in tone. Circle A, B or C.1. A. Women can do everything? B. Men can’t do what women can? C. Men and women are equal.2. A. I agree with you. B. You don’t agree with me? C. Do you agree with me?3. A. Men should do housework. B. Men shouldn’t do housework. C. Men shouldn’t do housework?4. A. Can women work as pilots? B. Women can’t work as pilot? C. Women pilots?5...

Đọc tiếp

XXIII. Choose the sentence which is different in tone. Circle A, B or C.

1. A. Women can do everything?            B. Men can’t do what women can?            C. Men and women are equal.
2. A. I agree with you.           B. You don’t agree with me?      C. Do you agree with me?
3. A. Men should do housework.             B. Men shouldn’t do housework.               C. Men shouldn’t do housework?
4. A. Can women work as pilots?              B. Women can’t work as pilot?              C. Women pilots?
5. A. My father is the breadwinner.                                      B. Who is the breadwinner in your family?

C. You are the breadwinner in the family.

Xem chi tiết

Lớp 9 Tiếng anh

NA

Nguyễn Thị Ngọc Ánh

30 tháng 3 2020 lúc 23:02

rade 9ConditionalChoose the best answer1._____have enough apples, she’ll make an apple pie this afternoon.A.Should sheB. If sheC. Will sheD. Unless she2.If you_____to me, you wouldn’t have got so much trouble.A.listenedB. would listenC. had listenedD. Would have listened3.If you don’t know how to spell a word, you_____ look it up in the dictionary.A. mustB. willC. shouldD. ought4.If the sun _____, we _____for a walk.A. shines / will goB. shone / willgoC. shone / would go D. had shone / would go5...

Đọc tiếp

rade 9

Conditional

Choose the best answer

1.

_____have enough apples, she’ll make an apple pie this afternoon.

A.Should she

B. If she

C. Will she

D. Unless she

2.

If you_____to me, you wouldn’t have got so much trouble.

A.

listened

B. would listen

C. had listened

D. Would have listened

3.

If you don’t know how to spell a word, you_____ look it up in the dictionary.

A. must

B. will

C. should

D. ought

4.

If the sun _____, we _____for a walk.

A. shines / will go

B. shone / will

go

C. shone / would go D. had shone / would go

5.

The campfire _____ if it _____ last night.

A. wouldn’t be cancelled / hadn’t rained

B. wouldn’t have been cancelled / hadn’t rained

C. would have been cancelled / hadn’t rained

D. will be cancelled / rains

6.

But for our parents, we _____ successful in life.

A. will never be B. would never be C. wouldn’t have be

D. would have never been

7.

If I _____ my wallet at home this morning, I _____ money for lunch now.

A. leave / will have

B. didn’t leave / would hav

e

C. hadn’t left / would have

D. hadn’t left / would have had

8.

It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.

A. were / would know

B. is / will know

C. had been / would have known

D. was / would know

9.

If we _____ the plans

carefully, we would not have had so many serious mistakes.

A. study

B. had studied

C. studied

D. were studying

10.

I will never talk to you again _____ you apologize me _____ your being rude.

A. if / for

B. unless / for

C. or / of

D. whether / or

11.

_____

i

f you work harder, you will be sacked.

A. Whether

B. If

C. However

D. Unless

12.

I think you should stop smoking.

A. If I am you, I will stop smoking.

B. If I were you, I will stop smoking.

C. If I were you, I would stop smoking.

D. If I had been you, I wo

uld stop smoking.

13.

If you take the ice out of the fridge, it

_____.

A. vaporizes

B. melts

C. heats

D. disappears

14.

We should do something to protect water from being polluted

_____

we will have nothing

to drink in the future.

A. if

B. whether

C. or

D. un

less

15.

Let’s knock on their door to see

_____

home.

A. if they’re

B. unless they’re

C. whether they were

D. if they were

16.

Unless we

_____

more snow, we can’t go skiing.

A. will have

B. have

C. have had

D. had

17.

You’ll fail the exam

_____

you start revis

ing.

A. if

B. until

C. when

D. unless

18.

Unless you wash the car, you

_____

not drive it at the weekend.

A. would

B. could

C. have to

D. may

19.

If Peter

_____

his car before the drive, he

_____

the problem of out of petrol.

A. checked / will not get

B. had checked / would not have got

C. checks / will not have got

D. would be checking / will not have got

20.

He stepped on the mine, and it exploded.

A.

If he doesn’t step on the mine, it doesn’t explode.

B.

If he doesn’t step on the mine, it won’t explode.

C.

If he didn’t step on the mine, it wouldn’t explode.

D.

If he hadn’t stepped on the mine, it wouldn’t have exploded.

21.

In my experiments, the liquid is cooled to 32

ºF. It always freezes.

A.

If you cool the liquid to 32 degrees, it froze.

B.

If you cooled the liquid

to 32 degrees, it would freeze.

C.

If you cool the liquid to 32 degrees, it will freeze.

D.

If you had cooled the liquid to 32 degrees, it would have frozen.

22.

It may rain this afternoon. I hope it doesn’t because I don’t want the match to be

canceled.

A. If

it rains, the match is canceled.

B. If it rains, the match will be canceled.

C. if it rained, the match would be canceled.

D. If it had rained, the match would have been canceled.

23.

Unfortunately, I don’t know Philosophy, so I can’t answer your question.

A.

If I know Philosophy, I can answer your question.

B.

If I know Philosophy, I will be able to answer your question.

C.

If I knew Philosophy, I would be able to answer your question.

D.

If I had known Philosophy, I would have been able to answer your question.

24.

_____

there are some more ideas, we can end the meeting now.

A. If

B. As if

C. Unless

D. In case

25.

If he

_____

with us now, he

_____

the beauty of nature of the National Park.

A. is / can enjoy B. was / will enjoy

C. has been / would enjoy D. were / could

enjoy

26.

If they had searched more carefully, they...the watch sooner.

A. will find

B. would find

C. found

D. would have found

27.

If I had got up early, I _____ to have breakfast now.

A. have

B.I had

C. would have

D. would have had

28.

I cannot buy a new co

mputer _____ I save enough money.

A. if

B. even if

C. unless

D. as if

29.

Most people you meet will be polite to you _____.

A. if you are polite to them

B. if you will be polite to them

C. unless you are polite to them

D. if you were polite to them

30.

If

you do so, it _____ the matter worse.

A. makes only

B. would only make

C. will only make

D. had only made

31.

You _____ English fluently unless you practice it every day.

A. will speak

B. will not speak

C. can speak

D. did not speak

32.

Hurry up _____ you will

miss the bus and be late for school.

A. if

B. and

C. or

D. as

33.

You will get a good seat if you _____ first.

A. come

B. came

C. have come

D. will come

34.

Mary

will not graduate_____.

A. if he passed all the tests

B. if he does not pass all the tests.

C. unless he passes all the tests

D. unless he had passed all the tests.

35.

If I had time, I would go with you.

A.I am free and surely go with you.

B.I am too busy to go with you.

C. I will go with you because I have time.

D. I am free enough to go with

you.

36.

If

San

dra

hadn’t been wearing a seat belt, she.... Injured.

A. has been

B. would has been

C. would be

D. would have been

37.

If I _____ the rain yesterday, I_____ ill.

A. had not caught / would have been

B. had not caught / would have not been

C. have n

ot caught / were not

D. have not caught / would have been

38.

He looked frightened as if he _____ a ghost.

A. sees

B. is seeing

C. has seen

D. had seen

39.

What _____if there _____ a serious nuclear accident.

A. will happen / was

B. happens / were

C. woul

d happen / were

D. would happen / had been

40

.

Linda

will not go to the party unless

her sister

..................

.too.

a. go

b. went

c. going

d. goes

Xem chi tiết

Lớp 9 Tiếng anh Câu hỏi của OLM

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)