Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
II. Choose the underlined word or phrase in each sentence below that needs correcting (1.0 point).
16. What a pity. I have to look at -> after my little brother, so I can't go to the cinema tonight. A B C D
17. The children decided to cancel their camping trip therefore -> because the weather was too bad. A B C D
18. If Caroline doesn't take a raincoat with her, she would -> will get wet on the way to school. A B C D
19. Mike said -> told me that he would spend his summer holiday in Vietnam the following month. A B C D
20. Jane, accompanied by her classmates, are -> is taking part in an English speaking contest A B C D
I. Choose the word, phrase or expression that best completes each sentence below (3.0 points).
1. The camera........... Sarah bought yesterday was made in Japan.
A. who B. which C. where
2. If I knew how to repair the machine, I .............you.
A. would help B. will help C. help
3. "Well, your sister has never cooked well,............?" Aunt Alice asked me.
A. hasn't she B. has she C. doesn't she
4. The church near our school............. in the 16th century.
A. was built B. was building C. built
5. The farewell party ended ............... 11.30 p.m. We were all tired but very happy.
A. in B.on C. at
6. Cathy got up early. ................. , she did not catch the train.
A. Therefore B. However C. Although
7. ............. is a festival which is celebrated in late March or early April in Israel and by all Jewish people.
A. Christmas B. Passover C. Easter
8. If you want to take a space trip, you must be in excellent ................ condition.
A. physics B. physically C. physical
9. Whenever Mr. Johnson sees the kids playing football, he wishes he ................young again.
A. is B. will be C. were
10. At the age of 18, Martin has to ................ some very difficult decisions.
A. make B. do C. put
11. Man: "Can I help you with your luggage. Madam?"
Woman: "..............."
A. Oh, thank you B. Oh, you're night. C. It must be boring. I'm afraid
12. Stranger: "Excuse me, where's the nearest post office?"
Mr. Johnson: "..............."
A. You can see in your dictionary.
B. It's over there. Next to the cinema.
C. Take a taxi, please.
13. Laura: "Would you mind closing the window, Ben? It's getting cold."
Ben: "..................."
A. No, of course not. B. Yes, I would C. Thanks. It's really encouraging
14. Veronica: "What a lovely dress you are wearing!"
Kate: "......................"
A. Certainty. It's costly B. No. thanks C. Thanks for your nee compliment.
15. Son: 'Why don't we go fishing this afternoon?"
Father: "..............."
A. That's a good idea B. Glad you enjoyed it C. The traffic is not too bad, I think.
II. Từ gạch chân đâu bạn???
B. READING
I Read the passage below and dedde which option A, B, or C best fits each space (1.0 point).
Today, there (26) ..........a TV set in nearly every home. People watch TV every day. Americans watch television about 35 hours a week. However, is television good (27) ...........bad for you? People have different answers to this question. Some say that there is a lot of violence on TV today, the programs are terrible and people do not get any exercise (28) ............they only sit and watch TV. others (29) ............. that TV programs bring news from all over the world and help you leam many useful things. Thanks to TV people learn about life (30) ............other countries, and it helps people relax after a long hard working day.
26. A. are B. is C. was
27. A. or B. but C. and
28. A. though B. despite C. because
29. A. talk B. think C. ask
30. A. at B. on C. in
II. Read the following passage and choose the best answer to each question (1.0 point).
English is one of the most popular languages in the world. It comes second in the number of speakers after Chinese. In Vietnam, more and more people are studying English and they consider it a key to success. However, not everyone knows how to learn English effectively.
The best way to improve the four skills: speaking. Irstervng, reading, and writing is to practice regularly. You should make use of every opportunity to speak Engiish with friends in class or at English speaking clubs or ourselves in front of the mirror. Learning by heart all the words does not help much if you do not read a lot because you will easily forget what you have learnt. Reading books, listening to radio and watching films are better ways to memorize words. Besides. English learners should not be so shy because making mistakes is unavoidable in learning foreign languages. Practicing speaking a lot is a good way to correct your mistakes.
* Questions
31. How many skills are mentioned in paragraph 2?
A. 2 B. 4 C. 5
32. The word "memorize" in paragraph 2 is CLOSEST in meaning to ...............
A. remember B. forget C.communicate
33. A good way to correct your mistakes Is
A. avoidng speaking English
B. stopping learning English
C. practicing speaking English a lot
34. Accordng to the passage, which of the following statements is TRUE?
A. You should never speak English with yourselves.
B. Many Vietnamese people consider English a key to success.
C. English learner should be shy if they make mistakes.
35. The passage is mainiy about .......................
A. how to leam English effectively.
B. people who study English in Vietnam.
C. how to read books, listen to radio and watch films.
C. WRITING
I. Finish each of the following sentences in such a way that it means the same as the sentence printed before it (1.0 point).
36. I am sorry, I don't understand the instructions on the packet.
I wish I understood the instructions on the packet.
37. They gave Martha a lot of presents on her birthday.
A lot of presents are given for Martha on her birthday.
38. "Let's play football this afternoon," Peter said to me.
Peter suggested playing football this afternoon.
39. The woman comes from Manchester. My teacher is talking with her over there.
The woman with whom my teacher is talking over there comes from Manchester.
40. Although Mr. Thomson is old, he runs 5 miles every morning.
In spite of being old, he rún 5 miles every morning.
II. Choose the underlined word or phrase in each sentence below that needs correcting (1.0 point).
16. What a pity. I have to look at => after my little brother, so I can't go to the cinema tonight.
17. The children decided to cancel their camping trip therefore => because the weather was too bad.
18. If Caroline doesn't take a raincoat with her, she would => will get wet on the way to school.
19. Mike said => told me that he would spend his summer holiday in Vietnam the following month.
20. Jane, who accompanied by her classmates, are taking part in an English speaking contest tomorrow morning.
1. If there is a mechanical problem, we suggest ................the manufacturer directly. A. contact C. to contact B. contacting D. be contacted
2. My shoes are dirty. I'd better take the...........before I come in. D.off C.on A. aways B: up
3. Our energy will soon come to an end if we don't.......... it. A. use B. save C. spend D. take
4. If you want to save money, you shoul.the amount of water your family uses A. reduce B. increase C. adapt D. repair
5. We decided not to go out for meal we were too tired. A but B. because C. so D. and
6. He is tird.ed up late watching TV A. so . B. and C. but D. because 7.The childre n like to put....nice clothes when they go out. A. in B. off C. into D. on 8. I like bananas,........ my brother doesn't. D. even though A. because B. but C. and . 9. Please turn................ he gas. I want to cook my lunch. A. over C. on D. over B. in 10. who is going to.........your children when you're at work? C. look after A. look for B. look up D. look out
2 Choose the correct answer to complete the sentence:
1. She studies well she is busy.
A. because B. since C. although D. and
2. Is he an actor ............ a singer? - An actor.
A. and B. or C. but D. so
3. Let's ............to the cinema
A. going B. to go C. go D. goes
4. She.................try to learn English for her job.
A. is B. has C. must D. was
5. The people ..............ive in Vietnam speak
A. which B. who C. whom D. when
6. Do you know the man................. you me yesterday?
A. when B. whom C. which D. whose
7. people...........take physical exercise can live longer
A. who B. whom C. which , D. when
8. Nga............... Math in Quy Nhon University for 4 years but now she teaches in her home village.
A. to learn B. learning C. learnt D. has learnt
9. She goes to the library three times a week. She................reads books there.
A. never B. often C. rarely D. once
10. Can you turn.............the light? It is too dark
A. on B. off C. down D. up
11. If you like that book, I will give it.............. You as my present.
A. for B. from C. at D. to
12. I suggest............to the movies.
A. go B. to go C. going D. went
13. We will go...............a picnic next week
A. in B. at C. on D. to
14. There is too much trafic.............. the air is polluted
A. Therefore B. Since C. However D. But
15. Hue will have temperatures ................. 23°C and 27°C tomorrow.
A. at B. betweern C. in D. with
16. Where will you go if you...............a car?
A. have B. had C. has D. having
17..............they thought the exam had been easy, they all failed
A. Although C. Though B. Even though D. All are correct
18. I'll clean the house.................you're cooking dinner A. since B. though C. while D. although
19. The English picture book.................... yesterday was very interesting.
A. I bought that B, that I bought C. what I bought D. I bought
20. My grandmother,..................... an intelligent woman, has greatly influenced mylife.
A. who is B. that is C. who she is D. she is
2 Choose the correct answer to complete the sentence: 1. She studies well she is busy. . A. because B. since C. although D. and 2. Is he an actor ............ a singer? - An actor. A. and B. or C. but D. so 3. Let's ............to the cinema A. going B. to go C. go D. goes 4. She.................try to learn English for her job. A. is B. has C. must D. was 5. The people ..............ive in Vietnam speak A. which B. who C. whom D. when 6. Do you know the man................. you me yesterday? A. when B. whom C. which D. whose 7. people...........take physical exercise can live longer A. who B. whom C. which , D. when 8. Nga............... Math in Quy Nhon University for 4 years but now she teaches in her home village. A. to learn B. learning C. learnt D. has learnt 9. She goes to the library three times a week. She................reads books there. A. never B. often C. rarely D. once 10. Can you turn.............the light? It is too dark A. on B. off C. down D. up
Choose the word or the phrase or sentence that best completes each unfinished sentence below or that best keeps the meaning of the original sentence if it is substituted for the underlined word or phrase.
1. They ... in that house for several months
A. live B. lived C. have lived D. are living
2. Lan and Maryam are penpals. They ... each other twice a month
A. writing B. write C. has written D. wrote
3. A: Would you like to have lunch with us ? B: ..........
A. All right B. Yes, I would C. No, I wouldn't like D. Yes, I'd love to
4. A: Congratulations on your winning. B: ..........
A. You're welcome B. That's very kind of you C. No, thanks D. Yes, of course
5. A: Shall I get a taxi for you ? B: ..........
A. Yes, I'd love to B. Oh, that would be nice C. Let's do D. Yes, why not ?
6. A: Could you mail this letter for me, please ? B: ...........
A. No, I could't B. I'll try C. Yes, here it is D. I'm sorry, I can't
7. A: How about going out to dinner tonight ? B: ..........
A. Oh, thank you B. Yes, please C. No, I don't want to D. I'm afraid not
8. Family members who live apart try to be together at Tet
A. beside B. away C. near D. close
9. Would you mind lending me your bike ?
A. Yes, here it is B. No, not at all C. Yes, let's D. Good idea
10. Why don't we go for a picnic this weekend ?
A. What do you suggest ? B. Yes, please C. How's that ? D. That's a good idea
11. She often goes ... church to pray because her religion is Islam
A. on B. at C. of D. to
12. That teacher is a (n) ... one. His pupils like his sense of humor
A. amusing B. amused C. amusement D. self - amused
13. The class is ... control because of the game
A. off B. away from C. out of D. below
14. Give her a telephone to ring ... she gets lost
A. whether B. unless C. untill D. incase
15. The party, at ... I was the guest honor, was extremely enjoyable
A. where B. that C. who D. which
16. The children ... to the zoo
A. were enjoyed take B. enjoyed being taken C. were enjoyed taking D. enjoyed taking
17. Go and get me some coffee, .......... ?
A. shall we B. shan't we C. will you D. won't you
18. He was unwilling to explain the reason ... his absence
A. why B. for C. of D. that
19. I'd have told you if I ... the book
A. had seen B. should have seen C. saw D. would have seen
20. He was so tired that he wasn't capable ... driving himself home
A. to B. for C. of D. from
Choose the word or the phrase or sentence that best completes each unfinished sentence below or that best keeps the meaning of the original sentence if it is substituted for the underlined word or phrase.
1. They ... in that house for several months
A. live B. lived C. have lived D. are living
2. Lan and Maryam are penpals. They ... each other twice a month
A. writing B. write C. has written D. wrote
3. A: Would you like to have lunch with us ? B: ..........
A. All right B. Yes, I would C. No, I wouldn't like D. Yes, I'd love to
4. A: Congratulations on your winning. B: ..........
A. You're welcome B. That's very kind of you C. No, thanks D. Yes, of course
5. A: Shall I get a taxi for you ? B: ..........
A. Yes, I'd love to B. Oh, that would be nice C. Let's do D. Yes, why not ?
6. A: Could you mail this letter for me, please ? B: ...........
A. No, I could't B. I'll try C. Yes, here it is D. I'm sorry, I can't
7. A: How about going out to dinner tonight ? B: ..........
A. Oh, thank you B. Yes, please C. No, I don't want to D. I'm afraid not
8. Family members who live apart try to be together at Tet
A. beside B. away C. near D. close
9. Would you mind lending me your bike ?
A. Yes, here it is B. No, not at all C. Yes, let's D. Good idea
10. Why don't we go for a picnic this weekend ?
A. What do you suggest ? B. Yes, please C. How's that ? D. That's a good idea
11. She often goes ... church to pray because her religion is Islam
A. on B. at C. of D. to
12. That teacher is a (n) ... one. His pupils like his sense of humor
A. amusing B. amused C. amusement D. self - amused
13. The class is ... control because of the game
A. off B. away from C. out of D. below
14. Give her a telephone to ring ... she gets lost
A. whether B. unless C. untill D. in case
15. The party, at ... I was the guest honor, was extremely enjoyable
A. where B. that C. who D. which
16. The children ... to the zoo
A. were enjoyed take B. enjoyed being taken C. were enjoyed taking D. enjoyed taking
17. Go and get me some coffee, .......... ?
A. shall we B. shan't we C. will you D. won't you
18. He was unwilling to explain the reason ... his absence
A. why B. for C. of D. that
19. I'd have told you if I ... the book
A. had seen B. should have seen C. saw D. would have seen
20. He was so tired that he wasn't capable ... driving himself home
A. to B. for C. of D. from
Bài tập trắc nghiệm Tiếng Anh lớp 9 Unit 6 The Environment
I. From each number, pick out the word whose underlined part is pronounced differently from the others.
1. A. happy B. hour C. high D. hotel
2. A. so B. coat C. note D. bottom
3. A. put B. luck C. lung D. drunk
4. A. bare B. car C. card D. farm
5. A. come B. love C. women D. some
6. A. many B. make C. fate D. pain
7. A. heat B. sweat C. threat D. thread
8. A. climb B. dictionary C. economic D. six
9. A. beg B. age C. gather D. guess
10. A. children B. choose C. child D. mechanic
II. From each number, pick out one word which has the stress on the first syllable.
1. A. garbage B. junkyard C. protect D. treasure
2. A. collected B. published C. protected D. provided
3. A. recycle B. refreshment C. creatures D. reuse
4. A. limitation B. intermediate C. desforestation D. disappointed
5. A. garbage B. problem C. solution D. sewage
III. Choose the word or the phrase or sentence that best completes each unfinished sentence below or that best keeps the meaning of the original sentence if it is substituted for the underlined word or phrase.
1. _________ air is one of the many problems we have to solve.
A. Pure B. Polluted C. Dust D. Pleasant
2. I’ll be in trouble if I _________my passport.
A. lose B. will lose C. lost D. would lose
3. We can eat at home or, ________ you prefer, we can go to a restaurant.
A. when B. whether C. if D. which
4. If it is raining this evening, I_________.
A. will go out B. don’t go out C. go out D. won’t go out
5. Minh’s English is excellent. He speaks________.
A. perfectly English B. English perfectly C. perfect English D. English perfect
6. I’m disappointed _________ people have spoiled this area.
A that B. when C. if D. how
7. He ________ to find a job but he had no luck.
A. hardly tried B. hard tried C. tried hardly D. tried hard
8. We couldn’t go on a picnic as planned __________ it was raining.
A. however B. but C. because D. so
9. If he ________ hard today, can he have a holiday tomorrow?
A. works B. will work C. worked D. would work
10. ________we were tired, we sat down beside the stream.
A. Because of B. If C. As D. And
11.He _________to find a job, but he had no luck.
A. tried hard B. hardly tried C. tried hardly D. try hardly
12. Solar energy doesn’t cause __________.
A. pollution B. polluted C. pollute D. pollutant
13. Are you lookingh forward ___________ my letter?
A. to see B. to seeing C. saw D. seeing
14. "___________” means a piece of land full of rubbish.
A. junkyard B. treasure C. hedge D. stream
15. Dynamite _________ many years ago.
A. has invented B. invented C. was invented D. were invented
16. Mary said to me "can you speak English?” In reported speech the sentence will be She asked me _________
A. if I can speak English B. if I could speak English. C. If can I speak English D. If I could speak English?
17. I live very far from school. I wish________
A. I lived far from school. B. I lived close to school. C. I live near the school now. D. I don’t live very far from school
18. If he __________ hard today, can he have a holiday tomorrow?
A. works B. will work C. worked D. would worked
19. Because there _________ no buses, we had to take a taxi.
A. are B. is C. was D. were
20. We plan to ________ this Saturday.
A. go hiked B. go hiking C. go to hike D. go hike
21. I’ll have to buy a map _________ I don’t know this area.
A. if B. because C. when D. because of
22. It is recommended that he __________ this course.
A. took B. take C. take D. taking
23. He’s running so fast. I __________ catch up with him.
A. cannot hardly B. can hardly C. not hardly
24. It is important that he _________ take the final examination.
A. has to B. have to C. had to D. having to
25. I will be __________if she manages to sell that motorbike at a high price.
A. surprised B. surprise C. surprising . D. to surprise
26. Unless you understand. I __________. explain it again to you
A. am B. was C. will. D. would
27. If you know where she lives, please let me__________
A. know B. knew C. known D. to know'
28. If he ______ a student, he will get a discount.
A. were B. was C. were D. will be
29. ______ you are interested in this film, don't go to see it at any cost. A. Unless B. If C. Because D. So
30. If you like that book. l will give it______you as my present.
A. to B. from C. at D. for
31. If you are busy, we ________ this by ourselves.
A. will do B. did C. would do D. doing
32. How about ______ dinner with us on Sunday?
A. to have B. have C. have had D. having
33. My brother is very fond of ______ to pop and rock music.
A. listen B. to listen C. listening D. listens
34. Life today is very different ______ life 50 years ago.
A. to B. from C. with D. at
35. My uncle is a ______. He often does research in his laboratory.
A. science B. scientist C. scientific D. scientists
36. My father arrives in Singapore ______Monday evening.
A. in B. at C. from D. on
37. John goes to his office every day except Sunday. ______ Sundays he stays at home.
A. On B. At C. In D. From
38. I hope the weather will be nice ______ the weekend.
A. in B. to C. at D. between
39. Would you like ______ to a party on Saturday?
A. come B. coming C. to come D. will come
40. Helen is always in the kitchen. She enjoys ______.
A. cook B. to cook C. cooks D. cooking
41. People wanted to see the opening of the ceremony, _____they started leaving very early in the morning
A. because B. so C. but D. and
42. Vietnamese women prefer to wear modern clothing ______ work. A. at B. in C. to D. with
43. He ______ with friends in an apartment in HCMC since last week. A. living B. has lived C. lived D. live
44. My mother said she ______ busy then
A. was B. is C. is being D. being
45. My village lies near the ______ of the mountain and by the river.
A. leg B. foot C. feet D. legs
46. If you don’t study hard , you ______ the exam.
A. failed B. will fail C. fail D. have failed
47. It is Saturday , ______?
A. is it B. it isn’t C. isn’t it D. wasn’t it
48. She said that she ______ learning English with you.
A. like B. liked C. liking D. to like
49. They ______ their home village last Sunday.
A. visit B. visited C. was visiting D. were visiting
50. He was born ______ March 25 , 1992.
A. at B. on C. in D. for
II. Match a line in column A with a line in column B to make a meaningful
A B
1. If people use public transport,
a. I can’t sleep.
2. You’ll learn English more easily
b. will you give her flowers?
3. If they don’t give him the job,
c. if he does exercise regularly.
4. If I drink coffee at night,
d. I don’t know what he will do.
5. You will speak English well
e. there will be less pollution
6. If you see her
f. if someone enters the building.
7. The alarm goes off
g. if you have more practice.
8. Henry may lose weight
h. if you study a little every day.
1. __e__; 2. __h_; 3. __d__; 4. __a__; 5. _g___; 6. _b___; 7. _f___; 8. _c___.
III. Complete the sentences with because/ as/ since/ if/ when, or so.
1. We decided to go out to eat ___because____ we had no food at home.
2. He has a very important job __so_____ he is particularly well-paid.
3. Can I borrow that book ___when ____ you’ve finished it?
4. No one was watching the television ___when____ I switched it off. 5. ___Because____ she changed a lot, we didn’t recognize her.
6. ___If____ you’ve ready, we can start now.
7. I’m going away for a few days, I’ll phone you ___when____ I get back.
8. You should inform the police ___if____ your bicycle is stolen.
9. Mathew went to bed _because___ it was too late to go out.
10. ___If____ you drive without driving license, you’re breaking the law.
11. ___Because____the weather was bad, they delayed their trip.
12.He will buy a new car ____if___ he saves up.
13.I can’t drive fast ___as____ the street is very crowded.
Fill in the blanks with proper words, then answer the following questions.
scientists/ pollution/ serious/ factories exhaust/ reduce/ require/ percentage
Everyone wants to reduce (1) __pollution_____. But the pollution problem is as complicated as it is (2) __serious_____. It is complicated because much pollution is caused by things that benefit people. For example, (3) ___exhaust____ from automobile caused large (4) ___percentage____ of air pollution. But the automobile provides transportation to millions of people. (5) __Factories_____ discharge much of the material that pollutes air and water, but factories give employment to a large number of people. Thus, to end or greatly (6) ___reduce____ pollutions immediately, people would have to stop using many things that benefit them. Most people do not want to do that, of course. But pollution can be gradually reduces in several ways, (7) __Scientists_____ and engineers can work to find ways t lessen the amount of pollution that such things as automobiles and factories cause. Government can pass and enforce laws that (8) __require_____ businesses and individuals to stop, or cut down on certain polluting activities.
Chúc bạn học tốt !!!
1. I am not a rich businessman and I can't afford to buy an expensive card.
---> If ....i were a rich businessman,i could afford to buy an expensive card..................
2. It rained last night so I didn't go to the barbecue.
---> If ...it hadn't rained last night,i would have gone to the barbecue..................
3. My parents do not allow me to go, so I have to stay at home
---> If ...my parents allowed me to go,i wouldn't have to stay at home.................
4. She doesn't pay afftention to her cooking so the food is horribile
---> If ...she paid afftention to her cooking,the food wouldn't be horribile................
5. The weather was very nice so we didn't go camping.
---> If ...the weather hadn't been very nice,we wouldn't have gone camping................
6. The computer broke down and I had to stop my work.
---> If ...the computer hadn't broken down ,i wouldn't have had to stop my work................
7. She loves him so she forgives him easily.
---> If she didn't love him,she wouldn't forgive him easily....................
8. He was energy so I didn't say anything.
---> If he hadn't been energy ,i would have said sth ....................
#Nốt :
* Choose the best answer to complete these following sentences :
1. We decided not to go out for meal .......... we were too tired.
A. but B. because
C. so D. and
2. My shoes are dirty. I'd better tapke thern ............. before I come in.
A. always B. up
C. on D. off
3. If you want to save money, you should ........... he amount of water your family uses.
A. increase B. reduce
C. adapt D. repair
4. Who is going to ............ your children when you're at work.
A. look for B. look up
C. look after D. look out
5. Mary's eyes are weak, ............., she has to wear glasses.
A. but B. however
C. and D. therefore
6. If there is a machanical problem, we suggest ............ the manufactuner directly.
A. contact B. contacting
C. to contact D. be contacted
7. Our energy will soon come to an end If we don't ............. it.
A. use B. save
C. spend D. take
8. The children like to put ...............- nice clothes when they go out.
A. in B. of
C. into D. on
9. I like bananas, ............ my brother doesn't.
A. because B. but
C. and D. even though
10. Please turn ............. the gas. I want to cooking my lunch.
A. over B. on
C. over
11. He is tired ............. he stayed up late watching TV.
A. so B. because
C. but D. and
12. Her parents saw her .............. at the railway station.
A. in B. for
C. up D. off
13. Can you turn ............ the light ? It's too dark.
A. on B. off
C. in D. for
14. What are you looking ........... ? My picture book. It've lost it
A. for B. off
C. in C. on
15. There are ............. saving mothods and inventions to use solar energy.
A. energy B. energize
C. energetic D.energetics
16. I had to pay much money this month for the intermational ....................
A. calls B. calling
C. W call D. called
17. A new air-conditioner will be ............. this morning.
A. installed B. to installl
C. installing
18. Scientists are looking for an .............. why to reduce energy.
A. affpective B. affpection
C. affect D. affectively
=> Xem lại đề ạ :v
19. We can ............. easily in the daylight
A. read B. to read
C. reading D. readed
-> Câu hỏi của ko ko - Tiếng Anh lớp 9 | Học trực tuyến