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1. solar energy doesn't cause................
a. pollution b. polluted c. pollute d. pollutant
2. tet is a festival............occurs in late january or early february
a. whom b. when c. where d. which
3. it's raining............, mr. Nam has to go to work
a. although b. so c. therefore d. however
4. if i.....................rich, i....................around the world
a. will be-travel b. am-will travel c. were-would travel d. would be- traveled
5. the girl wishes she.................in hue for the festival next week
a. had stayed b. was staying c. stay d. could stay
6. you don't like watching this film ..............?
a. don't you b. are you c. do you d. did you
7. when he lived in the city, he........................to the theater twice a week
a. uses to go b. has gone c. used to go d. was going
8. my house ..................... in 1999
a. is built b. was building c. was built d. has been built
9. the entrance examination will be held..............june 22nd2012
a.in b. on c. at d. to
10. hoa: i suggest going camping next sunday. -lan......................
a. that's a fine day b. that's a good idea c. that's a reason d. that's a good trip
Exercise 6 : Choose the best answer for each of the following sentences. 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 have 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._____if 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 would 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. unless 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 revising. 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 32ºF. 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 cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled D. If it had rained, the match would have been cancelled. 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 computer _____ 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.Sam 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 Margaret 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 not 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. would happen / were D. would happen / had been
Lần sau bn vt thì cách ra cho dễ nhìn nhé~~~~
Choose the best answer for each of the following sentences. 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 have 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
Chon dap an dung : ( BT ve thi )
1. ________ a car when they were living in London?
a. Have they b. Did they have c. Were they having d. have they had
2. They ________ serving meals by the time we get to the restaurant.
a. will stop b. stopped c. are stopping d. will have stopped
3. Mark was listening to music while his sister_______ a book.
a. read. b. reads c. is reading d. was reading
4. You______ here for my party, won't you?
a. shall be b. won't be c. will be d. are going to be
5. Can I borrow your bike on Monday? I'm sorry, but_____ it.
a. I'll be using b. used c. use d. have used
6. We______ the concert. It was really good.
a. are enjoying b. enjoy c. did enjoy d. would enjoy
7. It was 10 p.m. Most of the shops_____ just______
a. have/closed b. had/closed c. has/closed d. was closing
8. There's no more apples. We ______ them all.
a. had eaten b. ate c. eat d. have eaten
9. She_______ music all day. Now she fells tired.
a. has been playing b. is playing c. played d. plays
10. After he________ the house, he wrote a letter.
a. cleans b. was cleaning c. had cleaned d. has cleaned
11. They_____ me about it last week.
a. was telling b. told c. had told d. would tell
12. I_______ here at the end of the month.
a. will leave b. would leave c. would have left d. is leaving
13. I hope everything______ fine.
a. is b. was c. would be d. will be
14. My grandfather______ many years ago.
a. had died b. has died c. died d. was dying
15. I______________ my son the money for that last week.
a. gave b. given c. have given d. was given
16. Yesterday I passed by Peter's house, but the front door was closed. He__out.
a. went b. must have gone c. has gone d. had had
17. Where ________ you at 9:00 last night, Mr. Green?
a. have been b. were c. will be d. are
18. I ________ the dishwasher on when heard the shot.
a. am turning b. turned c. was turning d. turned
19. Now I _______ for what I said about you. It wasn't true and I shouldn't
have said it
a. do apologize b. apologized c. was apologized d. apologizing
20. Tim was tired. He ______ hard all day.
a. has been studying b. studies c. studied d. had been studying
Exercise 1
1. The wedding party________ held at the Rex Hotel.
A. is B. is being C. will be D. is going to be
2. How many languages_____ John speak?
A. do B. does C. did D. will
3. Hurry! The train________ I don't want to miss it.
A. comes B. is coming C. came D. has come
4. Angelina Jolie is a famous actress. She ________ in several films.
A. appears B. is appearing C. appeared D. has appeared
5. I saw Maggie at the party. She ________ in several film.
A. wears B. wore C. was wearing D. has worn
6. What time________ the next train leave?
A. does B. will C. shall D. would
7. Monica________ with her sister at the moment until she finds a flat.
A. stays B. is staying C. will stay D. is going to stay
8. After I________ lunch, I looked for my bag.
A. had B. had had C. have has D. have had
9. By the end of next year, George________ English for 2 years.
A. will have learned B. will learn C. has leaned D. would learn
10. The man got out of the car,_______ round to the back and opened the boot.
A. walking B. walked C. walks D. walk
11. For several years his ambition ________ to be a pilot.
A. is B. has been C. was D. had been
12. Henry________ into the restaurant when the writer was having dinner.
A. was going B. went C. has gone D. did go
13. He will take the dog out for a walk as soon as he ________ dinner.
A. finish B. finishes C. will finish D. shall have finished
14. Before you asked, the letter________
A. was written B. had been written C. had written D. has been written
15. She ________ English at RMIT these days.
A. studies B. is studying C. will study D. is gong to study
16. She's at her best when she________ big decisions.
A. is making B. makes C. had made D. will make
17. We________ next vacation in London.
A. spend B. are spending C. will spend D. are going to spend
18. Robert________ tomorrow morning on the 10:30 train.
A. arrived B. is arriving C. has arrived D. would arrive
19. Look! The bus________
A. left B. has left C. leaves D. is leaving
20. Mike________ one hour ago.
A. phoned B. was phoning C. had phoned D. has phoned
Exercise 1
1. The wedding party________ held at the Rex Hotel.
A. is B. is being C. will be D. is going to be
2. How many languages_____ John speak?
A. do B. does C. did D. will
3. Hurry! The train________ I don't want to miss it.
A. comes B. is coming C. came D. has come
4. Angelina Jolie is a famous actress. She ________ in several film.
A. appears B. is appearing C. appeared D. has appeared
5. I saw Maggie at the party. She ________ in several film.
A. wears B. wore C. was wearing D. has worn
6. What time________ the next train leave?
A. does B. will C. shall D. would
7. Monica________ with her sister at the moment until she finds a flat.
A. stays B. is staying C. will stay D. is going to stay
8. After I________ lunch, I looked for my bag.
A. had B. had had C. have has D. have had
9. By the end of next year, George________ English for 2 years.
A. will have learned B. will learn C. has leaned D. would learn
10. The man got out of the car,_______ round to the back and opened the boot.
A. walking B. walked C. walks D. walk
11. For several years his ambition ________ to be a pilot.
A. is B. has been C. was D. had been
12. Henry________ into the restaurant when the writer was having dinner.
A. was going B. went C. has gone D. did go
13. He will take the dog out for a walk as soon as he ________ dinner.
A. finish B. finishes C. will finish D. shall have finished
14. Before you asked, the letter________
A. was written B. had been written C. had written D. has been written
15. She ________ English at RMIT these days.
A. studies B. is studying C. will study D. is gong to study
16. She's at her best when she________ big decisions.
A. is making B. makes C. had made D. will make
17. We________ next vacation in London.
A. spend B. are spending C. will spend D. are going to spend
18. Robert________ tomorrow morning on the 10:30 train.
A. arrived B. is arriving C. has arrived D. would arrive
19. Look! The bus________
A. left B. has left C. leaves D. is leaving
20. Mike________ one hour ago.
A. phoned B. was phoning C. had phoned D. has phoned
1. I _______this film twice.
A. see B. saw C. will see D. have seen
2. –Peter, please help me do the washing up. – Sorry, Mum. I ____TV.
A. watch B. am watching C. had watched D. watched
3. The farmers _____ in the field now.
A. were working B. have worked C. worked D. are working
4. The war _____ out three years ago.
A. broke B. had broken C. has broken D. was breaking
5. He ______ a cup of coffee every morning.
A. drinks B. drank C. is drinking D. has drunk
6. She ______ a lot of new books.
A. had just bought B. has just bought C. buys D. bought
7. Up to the present, Nam_____ good work in his class.
A. does B. has done C. had done D. did
8. At present, that author ______ a historical novel.
A. is writing B. was writing C. has written D. had written
9. By next month, I _____ my first novel.
A. will finish B. am going to finish C. finish D. will have finished
10. Phong ______ at the university so far.
A. had worked B. was working C. worked D. has worked
11. How long _____ able to drive? – since 1990.
A. could you B. have you been C. were you D. are you
12. They ______ since eight o’clock.
A. are talking B. have been talking C. talked D. talk
13. My brother _______ in the army from 1990 to 1995.
A. served B. has served C. had served D. is serving
14. At this moment, I _____ that we have a good chance of victory.
A. was feeling B. am feeling C. feel D. had been feeling
15. I _____ the money from him yet.
A. haven’t received B. don’t receive
C. will receive D. am receiving
16. This is the most interesting book _____ .
A. I’ve read B. I had read C. I’ve ever readed D. I’ve ever read
17. I ____ him ten days ago.
A. see B. saw C. have seen D. will see
18. It ______ a long time since I last saw him.
A. is B. was C. will be D. had been
19. She _____ so hard this week that she doesn’t have time to go to the hairdresser’s.
A. works B. worked C. has been working D. had worked
20. Mr. John_______ to Los Angeles in 1992.
A. had gone B. has gone C. went D. was going
21. What ______ to you yesterday?
A. happened B. did happen C. had happened D. has happened
22. I never go to Australia. I _____ to Australia yet.
A. will go B. went C. haven’t been D. have been
23. What _____ do at 7:00 tomorrow morning.
A. will you B. shall you C. were you D. did you
24. Why ______ you come yesterday?
A. couldn’t B. can’t C. didn’t D. A and C
25. My mother ______ in this factory since 1990
A. works B. worked C. has worked D. had worked
26. I _____ my hair before breakfast this morning.
A. washed B. had washed C. was washing D. have washed
27. I _____ about him when he suddenly came in.
A. talk B. talked C. am talking D. was talking
28. He will finish this work before you _______ here tomorrow.
A. leave B. will leave C. would leave D. are going to leave
29. Don’t make noise. My mother ______ with her friends.
A. is talking B. was talking C. talks D. talked
30. He _____ in this office for ten years by next Monday.
A. will have been working
B. would be working C. will work D. will be working
31. No sooner _____ the office than the telephone rang.
A. was he leaving B. he was leaving C. he had left D. had he left
32. George______ this movie three times.
A. sees B. has seen C. saw D. had seen
33. Food, air and clothes _______ necessary for life.
A. was B. were C. is D. are
34. He ______ a visit to Halong Bay in 1995.
A. had paid B. paid C. has paid D. pays
35. This morning while I ______ for the bus, the rain stopped.
A. waited B. have waited C. had waited D. was waiting
36. What _____ during the last few weeks.
A. did you do B. had you been doing
C. have you been doing D. were you doing
37. Up to now, the teacher _______ our class five tests.
A. gives B. is giving C. has given D. had given
38. The students _____ English now.
A. study B. are studying C. will study D. have studied
39. I don’t feel good. I _____ work tomorrow.
A. won’t be going B. won’t go to C. don’t go D. went
40. He is tired because he ____ all day.
A. had worked B. has worked C. worked D. works
41. _____ at home tonight?
A. are you staying B. do you stay
C. were you staying D. did you stay
42. We _____ in this house for ten years.
A. are living B. were living C. had lived D. have lived
43. She ____ in the departure lounge for a long time.
A. is waiting B. was waiting C. waits D. has waited
44. I ______ my driving test on Friday.
A. have passed B. had passed C. passed D. was passing
45. I ______ a vegetarian since 1998.
A. am B. was C. have been D. had been
3. The secrtary ___ the report by 10:00 yesterday
a.hasn't finished b.hadn't finished c. didn't finished d. would finish
4. Jane's eyes are red. She __
a.cried b. has cried c. has been crying d. had cried
5. This room is dirty. Someone _____ in here
a. smoked b. has smoked c. had been smoking d. has been smoking
6. Arsenal _____ next Monday
a, wins b. will win c.would win d. is winning
7. It _____ rain tomorow
a. rains b. will rain c. is going to rain d. is raining
8. I'll come and see you before I _____ for America
a. leave b. will leave c. have left d. shall leave
9. The little girl asked what ____ to her fiend.
a. has happened b.happend c. had happend d. would have been happend
10. John ____ a book when i saw him
a. is reading b. read c. was reading d. reading
11. He said he ___return
a. will b. would c. can d.would be
12. Jack _____ he door
a. has just opened b. open c. will have opened d.opening
13.I have been waiting for you ____
a. since early morning b. since 9a.m c.for two hours d.all the correct
14. My sister __ for you since yessterday
a. is looking b. was looking c. has been looking d. looked
15.Jack )____ the door.
a. has just painted b.paint c. will have paited d. painting
16. The train ____ half an hour ago
a. has been leaving b. left c. has left d. had left
17. we __ Doris since last Sunday
a. don't see b. haven't seen c. didn't see d. hadn't seen
18.when i last saw him, he ___ in London
a. has lived b. is living c. was living d. had been living
19. she is tired now. She ___ for a long time
a. has been learning b.has learned c. learns d.learned
20.they will have gone home before you _____ to meet them
a. came b. come c.will come d. are coming
EX 2:
1. hurry up or the train __ before you catch it
a. will leave b. leaves c. will have left d.has left
2. now my sister ____a bicycle of her own
a. is having b. are having c. has d. had
3.A football team ___ chieflyof 12 players
a. composed b. composes c.comprised d. comprises
4. This is the first time I ___ here
a. am b.have been c.was d.be
5last week , my professor promised that he _____ today
a. would come b. will come c. comes d.coming
6. My girls friend arrived after I ____ for her about half an hour
a,was waiting b.had been waiting c.has been waiting d. have waited
7.did she say the _____ him tomorrow ?
a.has visited b. will visit c. would visit d. iss
8. ________ to rain before you woke up this morning ?
a. did it begin b. has never begun c.had it begun d. would it begun
9.my daughter saw an elephent this morning but she _ one before
a. had never seen b. has never seen c.never seen d. never had seen
10. I ___ in Da Nang before i moved to dong nai
a. have been living b. have lived c. had lived d. had been living
11. there are many ways ____ to Rome
a. is leading b. are leading c. leading d.led
12.when we got home, dinner ____ so we had a drink first
a. was preparing b. was being prepard c. was prepared d. had been prepared
13. she was tired. she ___ for a long time
a. has been learning b. had been learning c. learned d. was learning
14. he __ in space for 10 days by tomorrow
a. will travel b. will be travelling c. is not visiting d. does not visit
15. he said he would visit me, but he ___ me yet
a. has not visited b. had not visited c. is not visiting d. does not visit
16. The weather ___ fine so far this week
a. is b. has been c. was d. had been
17 Before the prime Minister leaves New Your he ___ several talks
a. will have had b. would have c. will be having d. has
18. we had just got out of car when it ___ to set fire
a. has begun b. had begun c. was beginning d. has
19.As soon as he __ a certificate in English, he will apply for a jop
a. would get b.got c. gets d.will get
20.he was told that he _ knocked out in the first round
a. had been b.was c. has been d. was being
Choose the best answer for each of the following sentences.
1. In my experiments, the liquid is cooled to 32oF. 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.
2. It may rain this afternoon. I hope it doesn't because I don't want the match to be cancelled.
A. If it rains, the match is cancelled.
B. If it rains, the match will be cancelled.
C. If it rained, the match would be cancelled.
D. If it had rained, the match would have been cancelled.
3. 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.
4. ______ there are some more ideas, we can end the meeting now.
A. If
B. As if
C. Unless
D. In case
5. 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
6. If they had searched more carefully, they _____ the watch sooner.
A. will find
B. would find
C. found
D. would have found
7. If I had got up early, I _______ to have breakfast now.
A. have
B. had
C. would have
D. would have had
8. I cannot buy a new computer ____ I save enough money.
A. if
B. even if
C. unless
D. as if
9. 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
10. If you do so, it _____ the matter worse.
A. makes only
B. would only make
C. will only make
D. had only made
11. You ______ English fluently unless you practice it every day.
A. will speak
B. will not speak
C. can speak
D. did not speak
12. Hurry up ______ you will miss the bus and be late for school.
A. if
B. and
C. or
D. as
13. You will get a good seat if you ______ first.
A. come
B. came
C. have come
D. will come
14. Sam 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
Tom asked her where she ............
A: are going B: goes C: was going D: will go
She studied very hard, .............. she passed the exam easily.
A: and B: so C: but D: because
The result will be better if Lan ................ harder.
A: work B: worked C: will work D: works
Peter will be here soon, .................. ?
A: won't he B: will he C: is he D: isn't he
They walked ............... two hours to reach the top of the mountain.
A: for B: of C: on D: at
He said that he .............. leave the city the following day.
A: has to B: had to C: would have to D: will have to
He wishes he .............. speak English well .
A: can B: could C: should D: will
Malaysia is divided ............... two regions.
A: to B: in C: into D: on
Must this test .................. on time ?
A: be finishing B: finish C: be finished D: be finish
Water ............ on Mars.
A: might find B: might found C: might be find D: might be found
If Lan .............. to lose some weight , she must do more exersice.
A: want B: wants C: playing D: be played
Islamic people often go to the .............. to pray.
A:pagoda B: mosque C: temple D: church
The book ............. of 254 pages and 6 chapters.
A:comprises B: makes C: has D: consists
The students used to ............. volleyball in that ground area.
A: play B: played C: playing D: be played
He wishes he............. around the world.
A: can travel B: could travel C: travel D: will travel
I can't reach the phone because I ............. a bath.
A: am having B: have C: was having D: be having
When she ............. , I was reading upstairs.
A: was coming B: is coming C: came D: comes
I ............ in England for a few weeks mow.
A: has been stayng B: am staying C: have been staying D: stay
11. B. has attracted - opened
12. C. will fly
13. C. used-would
14. D. should
15. A. That's a good idea.
16. D. to ask
17. D. body language
18. D. both A & C
19. B. commercials
20. C. innovation
21. A. will be running
22. B. was - wasn't
23. A. is - have developed
24. D. had - are no longer on demand in this century.
//đề bị lặp
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