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Giúp mình giải các bài tập về câu điều kiện và kèm giải thích vs ạ
1/ If I (buy)……buy………….. a new hat, I'll give it to you (loại 1 )
2/ If today (be)……were……… Sunday, the pupils could go swimming. (loại 2)
3/ If he had been here, he (have…would have had….. a lot of fun. (loại 3)
4/ If my brother has enough money, he (buy) ………will buy……a bicycle.(loại 1)
5 / If he (have)………had had……. time, he would have read this novel.(loại 3)
6. If she hadn’t missed the bus, she (not be)……wouldn't have been….. late.(loại 3)
7. If Peter (study)……studied……….. hard, he could get good marks.(loại 2)
8. If my sister (not have)……didn't have…… a terrible headache, she wouldn’t be absent from her class.(loại 2)
9. If Windy (come)………had come…….., we wouldn’t have cancelled the meeting.(loại 3)
10. If he hadn’t been angry, he (say)……would have said………. something.(loại 3)
11. If I …...a lot of money now, I ... a new car.(loại 2)
a. have /will buy b. have / would buy c. had/ will buy d. had/ would buy.
12. If I ……………you, I …………….do that.(loại 2)
a. am/ will b. were /would c. were/ will d. had been/ would.
13. If I were offered the job, I think I ... it.(loại 2)
a. take b. will take c. would take d. would have taken.
14. I would be very surprised if he ...(loại 2)
a. refuses b. refused c. had refused d. would refuse.
15. Many people would be out of work if that factory………….down.(loại 2)
a. closes b. had closed c. closed d. would close.
16. If she sold her car, she …much money.(loại 2)
a. gets b. would get c. will get d. would have got.
17. They would be disappointed if we…………….(loại 2)
a. hadn’t come b. wouldn’t come c. don’t come d. didn’t come.
18. Would John be angry if I ………… his bicycle without asking?(loại 2)
a. take b. took c. had taken d. would take.
19. She ...............terrible upset if I lost this ring.(loại 2)
a. will be b. would be c. were d. had been.
20. If someone…………in here with a gun, I would be very frightened.(loại 2)
a. would walk b. walks c. had walked d. walked.
21. What would happen if you ……….. to work tomorrow?(loại 2)
a. don’t go b. didn’t go c. won’t go d. wouldn’t go.
22. We ‘ll get wet if we ………....out.(loại 1)
a. go b. did go c. went d. had gone.
23. If I go shopping, I ………… some food.(loại 1)
a. buy b. will buy c. would buy d. would have bought.
24. If I find it, I ….… you.(loại 1)
a. will tell b. would tell c. had told d. told.
25. What would you do if you………..a million dollars?(loại 2)
a. would win b. win c. had won d. won.
26. They ‘d be hurt if I ……………….(loại 2)
a. don’t go b. didn’t go c. hadn’t gone d. wouldn’t go.
27. If we took the 6: 30 train, we……….…too early.(loại 2)
a. would have arrived b. arrived c. will arrived d. would arrive.
28. If I had known you were in hospital, I ……..…to see you.(loại 3)
a. will go b. would go c. went d. would have gone.
29. If I …., I would have said hello.(loại 3)
a. had seen b. see c. saw d. would see.
30. I ………. out if I hadn’t been so tired.(loại 3)
a. will go b. went c. would have gone d. would go.
31. If I ………….a camera, I would have taken some pictures.(loại 3)
a. have b. had c. would have d. had had.
21. If she …………… the lottery last year, She ………… rich now.
A. have won / would be
B. had won / would be
C.won / would be
D. wins / will be
22. If I …………… the homework last night, I …………… bonus today.
A. had done / would get
B. had done / would have got
C. done / would get
D. does / will get
23. If we had played this game yesterday, we …………… a lot of money now.
A. will have
B. may have
C. would have had
D. would have
24. If it ……………… last night, it would be cold today.
A. had rained
B. rained
C. have rained
D. was raining
25. If she …………… to me, she ……………… in trouble right now.
A. had listened / would be
B. had listened / would have be
C. had listened / would not be
D. A & B
26. If it had rained one hour ago, the streets ………… wet now.
A. would have be
B. will be
C. be
D. would be
27. If I ………………. to the beach yesterday, I would be tired today.
A. have gone
B. goes
C. had gone
D. A & B
28. If they had gone to school yesterday, they ……… .. to the museum now
A. would go
B. will go
C. could go
D. A&C
29. If he had done exercise last night, he ……… soccer right now.
A. will play
B. can play
C. plays
D. could play.
30. If Nina had not gone out last week, she ……………… die now.
A. will
B. would
C. could
D. B&C
Choose the best answer
1. If I.......................the prime minister of Vietnam, I would spend more money on education
A. am B. had been C. were D. would be
2. This bridge ....................by many engineers since 2004
A. has built B. have built C. has been built D. builds
3. The new laws to conserve wildlife in the area will be passed next month
A. protect B. pollute C. destroy D. eliminate
4. My brother ...................to school last years
A. walks B. walked C. has walked D. was walking
5. She has looked..................a job since her graduation but she still can't find a satisfying one
A. in B. up C. after D. for
6. This national park is.................... because it is in both tropical and temperate zones
A. beauty B. sub-tropical C. temperate D. clean
7. If they offered you the job, would you have accepted / it?
A B C D
TEST 1
I/ CHOOSE THE BEST ANSWER
1/ the last time I ..... in Athens, the weather was hot and humid
a. had been b. was c. am d. will have been
2. since i left my hometown, i .... to visit my friends and family several times
a. had returned b. have returned c. returned d. will have returned
1. haft the world's rain forests have already been ....
a/ endangered b. eroded c. found d. destroyed
2/ try to eliminate fatty foods from your diet
a. limit b. get rid of c. move d. add
3. acid rain has caused severe... on the hillside
a. erosion b. pollution c. destruction d. floods
5. this channel allows rainwater to run off
a. keep inside b. move around c. flow into d. flow out of
6. scientists are nơ researching new meansures to prevent... levels from rising
a/ pollute b. polluted c. polluting d. pollution
7. this park is the orphanage where lots of orphaned and abandoned animals are taken care of
a. looked after b. involved in c. dealt with d. moved in
8. new laws have been passed to ... wildlife in this area
a. establish b. conserve c. produce d. endanger
9. they were seeking a solution to the ... of the rain forests
a. destroy b. destroying c. destroyer d. destruction
10........ ken didn't have a ticket he was allowed to come in
a. although b.because of c. because d. in spite of
11. most most species in this forest are threatended with .....
a. appearance b. protection c. extinction d. destruction
12. we really ought to make a start on campaigns to ... our polluted rivers and seas
a. clean up b. clear away c. wipe out d. tidy up
15. the turtle has a long life.....
a. age b. span c. expectancy d. b and C
16. thy water is so contaminated that it is not suitable for drinking
a. toxic b. salty c. dangerous d. polluted
17. without plants, water would... .... as soon as it falls
a. run out b. run off c. run of d. run away
20. he's really delighted with his new CD player
a. pleased b. angry c. entertained d. annoyed
21. will you see tom at lunch today ? i'd like you to give him a message. i'm not going to lunch, but if i ..... him later, I.......him your message
a. should see/ will see b. see/give c. saw/ would d. could see/ will give
22, " john moved the big table alone" did he ? if he ..... me , I .... him
a. asked/ would help b. asked/ might have helped c. had asked/ could help
d. had asked / would have helped
23. what a beautiful dress you're wearing
- thank you, it.... especially for me by a French tailor
a. makes b. has made c. made d. was made
24. last night a tornado swept through Rockville. It..... everything in its path
a. was destroy b. was being destroyed c. destroyed d. had been destroyed
25. in some areas water...... from the ground faster than nature can replenish the supply
a. is being taken b. has been taking c. is taking d. has taken
26. an announcement about the eight o'clock flight to Chicago.......
a. has been already made b. has already made c. has already been made d. already made
27. .......during the storm
a. they were collapsed the fence b. the fence was collapsed c. they collapsed the fence d. the fence collapsed
28. the new computer system.........next month
a. is being install by people b. is be installed
c. will be installed d. is been installed
29. today many serious childhood diseases.....by early immuization
a. are preventing b. can prevent c. prevent d. can be prevented
30. it would have been a much more serious accident ..... fast at the time
a. was she driving b. she had driven c. had she been driving d. if she drove
31. we can't go along here because the road.........
a. is repairing b. is being repaired c. have been repaired d. has repaired
TEST 1
I/ CHOOSE THE BEST ANSWER
1/ the last time I ..... in Athens, the weather was hot and humid
a. had been b. was c. am d. will have been
2. since i left my hometown, i .... to visit my friends and family several times
a. had returned b. have returned c. returned d. will have returned
1. haft the world's rain forests have already been ....
a/ endangered b. eroded c. found d. destroyed
2/ try to eliminate fatty foods from your diet
a. limit b. get rid of c. move d. add
3. acid rain has caused severe... on the hillside
a. erosion b. pollution c. destruction d. floods
5. this channel allows rainwater to run off
a. keep inside b. move around c. flow into d. flow out of
6. scientists are nơ researching new meansures to prevent... levels from rising
a/ pollute b. polluted c. polluting d. pollution
7. this park is the orphanage where lots of orphaned and abandoned animals are taken care of
a. looked after b. involved in c. dealt with d. moved in
8. new laws have been passed to ... wildlife in this area
a. establish b. conserve c. produce d. endanger
9. they were seeking a solution to the ... of the rain forests
a. destroy b. destroying c. destroyer d. destruction
10........ ken didn't have a ticket he was allowed to come in
a. although b.because of c. because d. in spite of
11. most most species in this forest are threatended with .....
a. appearance b. protection c. extinction d. destruction
12. we really ought to make a start on campaigns to ... our polluted rivers and seas
a. clean up b. clear away c. wipe out d. tidy up
15. the turtle has a long life.....
a. age b. span c. expectancy d. b and C
16. thy water is so contaminated that it is not suitable for drinking
a. toxic b. salty c. dangerous d. polluted
17. without plants, water would... .... as soon as it falls
a. run out b. run off c. run of d. run away
20. he's really delighted with his new CD player
a. pleased b. angry c. entertained d. annoyed
21. will you see tom at lunch today ? i'd like you to give him a message. i'm not going to lunch, but if i ..... him later, I.......him your message
a. should see/ will see b. see/give c. saw/ would d. could see/ will give
22, " john moved the big table alone" did he ? if he ..... me , I .... him
a. asked/ would help b. asked/ might have helped c. had asked/ could help
d. had asked / would have helped
23. what a beautiful dress you're wearing
- thank you, it.... especially for me by a French tailor
a. makes b. has made c. made d. was made
24. last night a tornado swept through Rockville. It..... everything in its path
a. was destroy b. was being destroyed c. destroyed d. had been destroyed
25. in some areas water...... from the ground faster than nature can replenish the supply
a. is being taken b. has been taking c. is taking d. has taken
26. an announcement about the eight o'clock flight to Chicago.......
a. has been already made b. has already made c. has already been made d. already made
27. .......during the storm
a. they were collapsed the fence b. the fence was collapsed c. they collapsed the fence d. the fence collapsed
28. the new computer system.........next month
a. is being install by people b. is be installed
c. will be installed d. is been installed
29. today many serious childhood diseases.....by early immuization
a. are preventing b. can prevent c. prevent d. can be prevented
30. it would have been a much more serious accident ..... fast at the time
a. was she driving b. she had driven c. had she been driving d. if she drove
31. we can't go along here because the road.........
a. is repairing b. is being repaired c. have been repaired d. has repaired
II/ rewrite the following sentences
1. pay more attention or you won't understand what these people are saying
-> If you don't pay more attention, you won't understand what these people are saying.
2. i have just read one of my most favourite novels
-> One of my most favourite novels has just been read.
3. Alan's knowledge of art hasn't impressed me
-> I haven't been impressed by Alan's knowledge of art.
4. the pollution in the city was affecting people's breathing
-> People's breathing was being affected by the pollution in the city.
5. they are going to steal your money if you're not careful
-> Your money will be stolen if you're not careful.
7. mary really wants to buy the book, but she doesn't have enough money
-> Were Mary to have enough money, she would buy the book.
8. we believe that he has special knowledge which may be useful to the police
-> He is believed to have special knowladge which may be useful to the police.
-> It is believed that he has a special knowledge which maybe useful to the police.
9. lan is going to take a monthly test next tuesday
-> A monthly test is going to be taken by Lan next Tuesday.
10. my father makes me spell this word properly
-> I am made to spell this word properly by my father.
11. all his friend will see him off at the airport
-> He will be seen off at the airport by all his friends.
12. without helen's help, I couldn't have finished the work on time
-> If helen hadn't helped me, I couldn't have finished the work on time.
-> If it hadn't been for Helen's help, I couldn't have finished the work on time.
I/ Hãy dùng hình thức đúng của những động từ trong ngoặc, dùng câu điều kiện loại 3:
1. If she (wait).......had waited..........she should have met us
2. If you (telephone).........had telephoned...........me, I would have gone with you
3. If he had worked harder, they (give).........would have given...........him a better job
4. If I (have)............had had..........more time, I would have done the work more carefully
5. If I (be) .....had been......in your position, I wouldn't have said that
6. I (lend).......would have lent.........you money if you had mention it
7. If they had got up late, they (not, arrive).........wouldn't have arrived............at the station on time
8. He (get)..............would have gotten.........the job if he had come earlier
I/ CHOOSE THE BEST ANSWER
1. i haven't eaten anything since i ...... home from football practice
a. have got b. had gotten c. got d. will get
2. dr. lam ............ about the life time of sharks for many year and ....... some awards so far
a. have studied/ had gotten b. had studied/ had gotten
c. has studied/ has gotten d. studied/ will get
3. a large hydroelectric ...... was built on the river Danube
a. power b. dam c. bank d. wall
4. water can be held on the land by vegetation
a. plants used as food b. grown trees c. the growth of plants d. plants and trees
5. .......... air makes people unpleasant to breathe
a. pollute b. pollution c. polluted d. polluting
6. we are now facing the possible ........ of several rare spceies
a. danger b. variety c. existence d. dissappearance
7. of the six people in the plan when it crashed only one......
a. existed b. lived c. hurt d. survived
8. the cattle drank from a river polluted with toxic chemicals
a. waste b. colorless c. odorless d. poisonous
9. the charity is totally dependent .... money from the public
a. from b. in c. upon d. with
10. when the wastes are poured into the atmosphere the air becomes contaminated and unpleasant to breathe
a. dense b. dirty c. upon d. with
11. they were sent to a local ........ right after theirr parent's death
a. orphanage b. hospital c. park d. prison
12. cuc phuong national park is ......... 160km south west of hanoi
a. lied b. established c. abandoned d. located
13. nearly 1000 of the world's bird species are ........ with extinction
a. threatened b. endangered c. protected d. abandoned
14. many people come to the nation parks to see the work being done to protect endangered species
a. plants or animals that may be dangerous to people
b. plants or animals that disappeared form the world
c. plants or animals that are about to die
d. plants or animals that may soon become extinct
15. rare species of plants or ........ can be found in this region
a. fauna b. flora c. flowers d. vegetation
16. the hydroelectric plant provides electricity for half the island's population
a. using hydrogen to produce electricity
b. using radiating energy to produce electricity
c. using water power to produce electricity
d. using tidal power to produce electricity
17. the whale is a(n) .............species, there must be laws to protect them or they will be extinct
a. endanger b. dangerous c. endangered d. endangering
18. if someone........you, say' thank you" to him
a. helps b. helped c. will help d. would help
19. ............. you, i would think twice about that deccision. it could be a bad move
a. if i am b. should i be. c. were i d. if i had been
20. if i weren't working for an electrical company, i ......... in the post office
a. work b. will work c. have worked d. would be working
21. why are you sitting in the dark. let's just sa that if i ..... my electricity bill last month. I.... in the dark now
a. paid/ wouldn't be b. paid/ won't be c. had paid/ wouldn't have been d. had paid/wouldn't be
22. why did tom keep making jokes about me? i don't enjoy .........
a. be laughed at b. to be lauged at c. laughing at d. being lauged at
23. if the world's tropical forest continue to disappear at their present rate. many animal species.....
a. became b. would have become c. will become d. would become
24. ....... resigned, we would have been forced to sack him
a. had he not b. hadn't be c. he had not d. he not had
25. i won't lend you this money..... you promise to pay it back
a. in case b. if c. otherwise d. unless
26. if you ......... us about the bad service, we'd have eaten there
a. didn't tell b. wouldn;t have told c. hadn't told d. had told
27. diana is a wonderfull ballet dancer. she ........ since she was four
a. would be dancing b. has been danced c. has danced d. was danced
28. if he ..... with us last weekend, he............ the beauty of the national park
a. were/ would enjoy b. was/ would be enjoying c. had been/ would enjoy d. had been/ would have enjoyed
29 . that part of the nation park ......... several times this year
a. is repaired b. has repaired c. repaired d. has been repaired
II/ choose the words or phrases that best complete this passage
cuc phuong, the first national park in viet nam was officially open in 1960. it (1).........160km south of west of hanoi spainning ninh binh , hoa binh and thanh hoa province. cuc phuong national park (2)............over 200 spare km of rainforest. it attracks (3)....... tourists and scientists. in 2002, nearly 100000 visitors made their way to cuc phuong. tourists come there to study butterfies, visit caves, hike mountain and look at the (4) ..... tree. many come to see the work done to protect (5)....... species. according, to scientists, there about 2000 different species of (6) ....... and 450 species of fauna in the park
1. a. locates b. located c. is located d. is locating
2. a . covers b. contains c. abandons d. controls
3. a. neither b. either c. both d. every
4. a . 1000- year-old b. 1000- years- old c. 1000 year old d. 1000 years
5. a. dangerous b. wild c. rare d. endangered
6. a. trees b. flora c. vegetation d. flowers
I/ CHOOSE THE BEST ANSWER
1. i haven't eaten anything since i ...... home from football practice
a. have got b. had gotten c. got d. will get
2. dr. lam ............ about the life time of sharks for many year and ....... some awards so far
a. have studied/ had gotten b. had studied/ had gotten
c. has studied/ has gotten d. studied/ will get
3. a large hydroelectric ...... was built on the river Danube
a. power b. dam c. bank d. wall
4. water can be held on the land by vegetation
a. plants used as food b. grown trees c. the growth of plants d. plants and trees
5. .......... air makes people unpleasant to breathe
a. pollute b. pollution c. polluted d. polluting
6. we are now facing the possible ........ of several rare spceies
a. danger b. variety c. existence d. dissappearance
7. of the six people in the plan when it crashed only one......
a. existed b. lived c. hurt d. survived
8. the cattle drank from a river polluted with toxic chemicals
a. waste b. colorless c. odorless d. poisonous
9. the charity is totally dependent .... money from the public
a. from b. in c. upon d. with
10. when the wastes are poured into the atmosphere the air becomes contaminated and unpleasant to breathe
a. dense b. dirty c. upon d. with
11. they were sent to a local ........ right after theirr parent's death
a. orphanage b. hospital c. park d. prison
12. cuc phuong national park is ......... 160km south west of hanoi
a. lied b. established c. abandoned d. located
13. nearly 1000 of the world's bird species are ........ with extinction
a. threatened b. endangered c. protected d. abandoned
14. many people come to the nation parks to see the work being done to protect endangered species
a. plants or animals that may be dangerous to people
b. plants or animals that disappeared form the world
c. plants or animals that are about to die
d. plants or animals that may soon become extinct
15. rare species of plants or ........ can be found in this region
a. fauna b. flora c. flowers d. vegetation
#cont
16. the hydroelectric plant provides electricity for half the island's population
a. using hydrogen to produce electricity
b. using radiating energy to produce electricity
c. using water power to produce electricity
d. using tidal power to produce electricity
17. the whale is a(n) .............species, there must be laws to protect them or they will be extinct
a. endanger b. dangerous c. endangered d. endangering
18. if someone........you, say' thank you" to him
a. helps b. helped c. will help d. would help
19. ............. you, i would think twice about that deccision. it could be a bad move
a. if i am b. should i be. c. were i d. if i had been
20. if i weren't working for an electrical company, i ......... in the post office
a. work b. will work c. have worked d. would be working
21. why are you sitting in the dark. let's just sa that if i ..... my electricity bill last month. I.... in the dark now
a. paid/ wouldn't be b. paid/ won't be c. had paid/ wouldn't have been d. had paid/wouldn't be
22. why did tom keep making jokes about me? i don't enjoy .........
a. be laughed at b. to be lauged at c. laughing at d. being lauged at
23. if the world's tropical forest continue to disappear at their present rate. many animal species...
a. became b. would have become c. will become d. would become
24. ....... resigned, we would have been forced to sack him
a. had he not b. hadn't be c. he had not d. he not had
25. i won't lend you this money..... you promise to pay it back
a. in case b. if c. otherwise d. unless
26. if you ......... us about the bad service, we'd have eaten there
a. didn't tell b. wouldn;t have told c. hadn't told d. had told
27. diana is a wonderfull ballet dancer. she ........ since she was four
a. would be dancing b. has been danced c. has danced d. was danced
28. if he ..... with us last weekend, he............ the beauty of the national park
a. were/ would enjoy b. was/ would be enjoying c. had been/ would enjoy d. had been/ would have enjoyed
29 . that part of the nation park ......... several times this year
a. is repaired b. has repaired c. repaired d. has been repaired
II/ choose the words or phrases that best complete this passage
cuc phuong, the first national park in viet nam was officially open in 1960. it (1).........160km south of west of hanoi spainning ninh binh , hoa binh and thanh hoa province. cuc phuong national park (2)............over 200 spare km of rainforest. it attracks (3)....... tourists and scientists. in 2002, nearly 100000 visitors made their way to cuc phuong. tourists come there to study butterfies, visit caves, hike mountain and look at the (4) ..... tree. many come to see the work done to protect (5)....... species. according, to scientists, there about 2000 different species of (6) ....... and 450 species of fauna in the park
1. a. locates b. located c. is located d. is locating
2. a . covers b. contains c. abandons d. controls
3. a. neither b. either c. both d. every
4. a . 1000- year-old b. 1000- years- old c. 1000 year old d. 1000 years
5. a. dangerous b. wild c. rare d. endangered
6. a. trees b. flora c. vegetation d. flowers
1. I would have visited you before if there _____ quite a lot of people in your
house.
A. hasn't
B. hasn't been
C. wouldn't be
D. wasn't
2. If you had caught the bus, you _____ late for work.
A. wouldn't have been
B. would have been
C. wouldn't be
D. would be
3. If I _____, I would express my feelings.
A. were asked
B. would ask
C. had been asked
D. asked
4. If _____ as I told her, she would have succeeded.
A. she has done
B. she had done
C. she does
D. she did
5. Will you be angry if I _____ your pocket dictionary?
A. stole
B. have stolen
C. were to steal
D. steal
6. You made a mistake by telling her a lie. It _____ better if you _____ to her.
A. would have been / hasn't lied
B. would be / didn't lie
C. will be / don't lie
D. would be / hasn't lied
7. John would be taking a great risk if he _____ his money in that business.
A. would invest
B. Conc
C. had involved
D. invests
8. She wouldn't have given them all that money if we _____ her to.
A. wouldn't advise
B. won't advise
C. hadn't advised
D. didn't advise
9. If the tree hasn't been so high, he _____ it up to take his kite down.
A. could have climbed
B. climb
C. is climbing
D. climbed
10. If the wall weren't so high, he _____ it up to take his ball down.
A. climbed
B. could climb
C. is climbing
D. climb
11. If I _____ her phone number, I _____ her last night
A. had known / could have phoned
B. knew / would have phoned
C. know / can phone
D. knew / could phone
12. If he ______ the truth, the police wouldn't arrest him.
A. tells
B. told
C. had told
D. would tell
13. If you press that button what _____?
A. would happen
B. would have happened
C. will happen
D. happen
14. She says if she _____ that the traffic lights were red she _____.
A. had realized / would stop
B. realized / could have stopped
C. has realized / stopped
D. had realized / would have stopped
15. I am very thin. I think, if I _____ smoking, I might get fat.
A. stop
B. had stopped
C. will stop
D. stopped
16. If I _____ that yesterday, I _____ them.
A. had discovered / would inform
B. had discovered / would have informed \
C. had discovered / could inform
D. discovered / can inform
17. If you _______ to the course regularly, they ________ a certificate last
year.
A. go / gave
B. go / give
C. had gone / would have given
D. went / would give
18. I think he is not at home. If he _____ in, he ______ the phone.
A. was / answered
B. were / would answer
C. were / would have answered
D. had been / would have answered
19. If I ______ in London now, I could visit British Museum.
A. were
B. had been
C. have been
D. would be
20. If Columbus _______ money from Queen Isabella, he _______ across the
Atlantic.
A. do not receive / could not sail
B. had not received / might not have sailed
C. did not receive / might not have sailed
D. would not receive / might not sail
10 câu còn lại bạn tự luyện nhé