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1 The committee __ the question for nearly anhour, and still hasn’t come to decision

A, is discussing B, had discussed C, will discuss D, has been discussing

2 By the year 2010, they __ in this factory for three years.

A, will work B, have worked C, will have worked D, will be working

3 Apart from catching cold a few times, I __ the project to the committee.

A, will have presented B, will present C, will be presenting D, will have been presenting

4 Martin __ to remain in his present position for now in spite of beings dissatisfied with the salary.

A, had decided B, is deciding C, has decided D, decide

5 When you look through the small window, you __ that the safe is inits usual place.

A, would discover B, discovered C, will be discovering D, will discover

6 The President __ to bring the problem before the whole club members so that everybody can express.

A, had decided B, has decided C, decided D, will decide

7 The author __ that it __ necessary for every adolescent toedtablish his own place in society.

A, believes – is B, believed – is C, believed – has been D, has believes – was

8 While he __ for the light to change, he __ on the car radio.

A, was waiting – turned B, is waiting – has turned C, waited - turned D, was – waiting – was turning

9 Karen __ hard for the last three days.

A, worked B, has been working C, is working D, was working

10. Helen __ in Denver for several years before she moved to Washington.

A, was living B, has lived C, had lived D, has been living

11. By the time the vet __ from the town, half of the cows in the village __

A, arrived – will have died B, arrived – has died C, arrives – had died D, arrived – died

12. I __ for sprouts but I __ any.

A, have been looking – didn’t find B, looked – have’t found C, had looked – haven’t found D, have been looking – haven’t found

13 The girls seem to be fully satisfied with their English course. So far, they __ even a single class

A, don’t miss B, haven’t missed C, didn’t miss D, hadn’t missed

14 Tell him I __ anything with him until I have spoken with my wife.

A, won’t discuss B, haven’t discussed C, don’t discuss D, didn’t discuss

15 Changes in temperature __ rocks into pieces and the wind __ pieces away.

A, breaks – is blowing B, has broken – blew C, breaks – blows D, broke – was blowing

16 Until education __ a public service, the establishment of schools was left to private sector.

A, would come B, becameC, becomesD, had become

17 I __ waiting till evething __ ready.

A, sat – wasB, have sat – isC, sat – will be D, had become

18 The police officer showed us the room where the murder __ place.

A, will takeB, tookC, was talkingD, has taken

20 I __ that book such a long time before that I was unable to remember what ut was about.

A, have readB, would readC, was going to readD, had read

21. The crowd waiting in the square __ to grow impatient as the hours __ by and the minister __

A, begin – are going - hasn’t turned upB, began – have gone – didn’t turn up

C, begins – went – doesn’t turn upD, began – went – did’t turn up

22. When I __ the novel I’ll lend it to you.

A, will finishB, will have finished C, have finished D, finished

23 In spite of the large sum of money she __ from her family, she still __ about suffering from a lack of money.

A, has received – is complaininB, is receiving – complainsC, receives – complained D, receives – complains

24 They __ how deeply the rows between his parents __ the child.

A, didn’t realize – had affectedB, didn’t realize - have affectedC, don’t realize – affectedD, will never realize – had affected

25 These statistics __ that life expectancy __ quite signigicantly longer in cold climates than that in warm onces.

A, show – wasB, show – is C, showed – isD, showed – will be

26 She is really worried that she __ to the exam because she doesn’t have her identity card on her.

A, haven’t admittedB, is not admittingC, hadn’t been admittedD, won’t be admitted

27 I’ve just notices that she __ a haircut. It __ wonderfull

A, will have – has lookedB, had has – lookedC, has had – looksD, has – is looking

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Choose the correct answer. 1. This is the second time I _____________that song. A. am hearing B. have heard C. hear D. heard 2. Hello, I___________ about your advertisement in the newspaper. A. Have been calling B. am calling C. call D. have called 3. John___________ on a bit of weight lately, and he is trying to lose it. A. Puts B. is putting C. has put D. has been putting 4. The new neighbors_________ their house. It looks nice. A. Paint B. had painted C. were painting D. have...
Đọc tiếp

Choose the correct answer.

1. This is the second time I _____________that song.

A. am hearing B. have heard C. hear D. heard

2. Hello, I___________ about your advertisement in the newspaper.

A. Have been calling B. am calling C. call D. have called

3. John___________ on a bit of weight lately, and he is trying to lose it.

A. Puts B. is putting C. has put D. has been putting

4. The new neighbors_________ their house. It looks nice.

A. Paint B. had painted C. were painting D. have painted

5. Fred__________ me yesterday that they're professional athletes.

A. Told B. has told C. was telling D. had told

6. Apparently, he_________ them since he was a child.

A. Knows B. is knowing C. has known D. has been knowing

7. I__________ for my sunglasses since noon, but I can't find them.

A. Am looking B. looked C. have looked D. have been looking

8. When the children_________home, it was obvious that they had been playing in mud.

A. Arrived B. were arriving C. had arrived D. had been arriving

9. Michael___________in the queue to buy a ticket for the train when he heard a strange voice.

A. Waited B. was waiting C. had waited D. was going to wait

10. The thieves_______ houses for two years before they were finally caught.

A. Broke into B. were breaking into C. had been breaking into D. have been breaking into

11. As time goes by, he__________more and more eccentric.

A. Becomes B. is becoming C. has become D. has been becoming

12. Kathy can't go shopping with me next Saturday morning. She_________a French lesson.

A. Has B. is going to have C. will have D. will be having

13. I__________ the living room by the time Dad comes home. He__________ so surprised.

A. Will paint/will be B. will be painting/is C. will have painted/will be D. will have painted/is

14. It's the coldest winter we__________ in Greece.

A. Ever experience B. ever experienced C. were ever experiencing D. have ever experienced

15. When he___________ was younger, he the cinema every week.

A. Was used to going B. used to go C. was going D. had gone

16. They________for a mile when they___________that someone___________missing.

A. Had walked/ had realized/ was B. had been walking/ realized/ had been

C. had been walking/ realized/ was D. had walked/ had realized/ had been

17. As part of my job, I_________ abroad a lot, so I_______ to improve my English.

A. Travel/ need B. am travelling/ need C. am travelling/ am needing D. travel/ am needing

18. I_________ at my mother's house this week because I__________ my house painted.

A. Sleep/ have B. am sleeping/ have C. sleep/ am having D. am sleeping/ am having

19. I you should buy him a tie. He___________to dress formally.

A. Am thinking/ likes B. think/likes C. think/ is liking D. am thinking/ has liked

20. As a teenager, I_________ things my parents__________ of.

A. Would do/ didn't approve B. used to do/ weren't approving

C. used to do/ didn't approve D. would do/ weren't approving

21. "Hurry up! We're waiting for you. What's taking you so long?"

"I________ for an important phone call. Go ahead and leave without me."

A. Wait B. will wait C. am waiting D. have waited

22. Robert is going to be famous some day. He_________in three movies already. ~ I'm sure he'll be a star.

A. Has been appearing B. had appeared C. has appeared D. appeared

23. Where's Polly? ~She_________.

A. Is in her room studying B. in her room is studying

C. studies in her room D. has in her room studied

24. Hello? Alice? This is Jeff. How are you? ~ Jeff? What a coincidence! I_________ about you when the phone rang.

A. Was just thinking B. just thought C. have just been thinking D. was just thought

25. What___________ about the new simplified tax? ~It's more confusing than the old one.

A. Are you thinking B. do you think C. have you thought D. have you been thinking

26. When is Mr. Fields planning to retire? ~ Soon, I think. He________ here for a long time. He'll probably retire next year or the year after that.

A. Worked B. had been working C. has been working D. is working

27. Why did you buy all this sugar and chocolate? ~ I_________a delicious dessert for dinner tonight.

A. Make B. will make C. am going to make D. will have made

28. Let's go! What's taking you so long? ~ I'll be there as soon as I__________my keys.

A. Found B. will find C. find D. am finding

29. Next week when there______ a full moon, the ocean tides sill be higher.

A. Is being B. is C. will be D. will have been

30. While I______TV last night, a mouse ran across the floor.

A. Watch B. watched C. was watching D. am watching

31. Fish were among the earliest forms of life. Fish__________ on earth for ages and ages.

A. Existed B. are existing C. exist D. have existed

32. The phone ________constantly since Jack announced his candidacy for president this morning.

A. Has been ringing B. rang C. had rung D. had been ringing

33. The earth_________on the sun for its heat and light.

A. Is depend B. depending C. has depended D. depends

34. I don't feel good. I________ home from work tomorrow.

A. Am staying B. stay C. will have stayed D. stayed

35. Today there are weather satellites that beam down information about the earth's atmosphere. In the last two decades, space exploration_________ great contributions to weather forecasting.

A. Is making B. has made C. made D. makes

36. On July 20th, 1969, Astronaut Neil Armstrong_________ down onto the moon, the first person ever to set foot on another celestial body.

A. Was stepping B. stepped C. has stepped D. was step

37. The plane's departure was delayed because of mechanical difficulties. When the weary passengers finally boarded the aircraft, many were annoyed and irritable because they___________ in the airport for three and a half hours.

A. Are waiting B. were waiting C. have been waiting D. had been waiting

38. If coastal erosion continues to take place at the present rate in another fifty years, this beach_______anymore.

A. Doesn't exist B. isn't going to exist C. isn't existing D. won't be existing

39. Homestead High School's football team_______a championship until last season, when the new coach led them to take first place in their league.

A. Has never won B. is never winning C. had never been winning D. had never won

40. To be able to qualify as an interpreter, many years of intensive language study are required for non-native speakers. By the end of this year, Chen________English for three years, but he will still need more training and experience before he masters the language.

A. Will be studying B. has studied C. will have been studying D. has been studying

41. In our hospital, patients________ every morning.

A. Are examined B. have examined C. can examine D. were examining

42. I_________ in Can Tho for 18 years, but now I'm living in Ho Chi Minh city.

A. Have lived B. live C. lived D. have been living

43. I wondered why he_________ his job.

A. Has changed B. changes C. used to change D. had changed

44. The department store__________ by the Johnson for many years.

A. Has been run B. is run C. runs D. has run

45. Kate________ 10 comedies this summer.

A. Has watched B. had watched C. will have watched D. watched

46. The number of footballers________ for the last ten years.

A. Has increased B. was increasing C. have increased D. were increasing

47. Don't worry! We_______for you at 6 o'clock tomorrow.

A. Will wait B. will be waiting C. wait D. are waiting

48. Mary__________the country by the time this letter reaches her.

A. Is going to leave B. will leave C. is leaving D. will have left

49. By this time next year, my father________here for 25 years.

A. Are going to work B. will be working C. will have been working D. will work

50. Tim_________in three movies already. I think he'll be a star some day.

A. Had appeared B. has appeared C. was appearing D. is appearing

51. They_________the door. No one can get in now.

A. Have locked B. had locked C. locked D. lock

52. The existence of many stars in the sky__________ us to suspect that there may be life on another planet.

A. Have led B. leads C. lead D. leading

53. They___________ the town hall for the past three years in fact, but they it yet.

A. Built/ hadn't finished B. had built/ didn't finish

C. have been building/ haven't finished D. have built/ weren't finishing

54. When I met Jim, he__________ from his university already.

A. Graduated B. has graduated C. had graduated D. was graduating

1
13 tháng 12 2018

1B 2C 3D 4D 5A 6C 7D 8A 9B 10 C

1 the program was so ............. that half of them fell asleep a boring b bore c bored d boredom 2 last night , i was watching tv ............. my mother was cooking in the kitchen a then b and c when d while 3 the bridge ..............................in 2000 a was built b built c has been built d builds 4 if a disaster ......................in an area , people from the other areas will offer their help a happen b happened c is happened d happens 5 they ......................... in that...
Đọc tiếp

1 the program was so ............. that half of them fell asleep a boring b bore c bored d boredom 2 last night , i was watching tv ............. my mother was cooking in the kitchen a then b and c when d while 3 the bridge ..............................in 2000 a was built b built c has been built d builds 4 if a disaster ......................in an area , people from the other areas will offer their help a happen b happened c is happened d happens 5 they ......................... in that company for five years a work b have worked c worked d are working 6 she likes watching the stars ........................night a at b on c for d in 7 my father suggests ............................. a trip to the countryside on saturday a to have b had c have d having 8 he loves his parents very much and wants them to be .............................. a happily b happiness c happy d happiest 9 she can not go to the party because she will have to ...............her little sister a look up b look for c look after d look at 10 an : shall we go out to choose a birthday gift for mary ? phuc ; .................................... a good idea b happy birthday c yes , please do d are you sure ? 11 . lan is very tired . ...................... , she has to finish her work before going to bed a so b although c however d therefore 12 we will meet david , ....................... comes from england a whom b that c which d who 13 where is linh now - she ........................... be in the school library a may b should c will d ought

1
14 tháng 5 2017

1 ;the program was so ............. that half of them fell asleep

a boring b bore c bored d boredom

2 last night , i was watching tv ............. my mother was cooking in the kitchen

a then b and c when d while

3 the bridge ..............................in 2000

a was built b built c has been built d builds

4 if a disaster ......................in an area , people from the other areas will offer their help

a happen b happened c is happened d happens

5 they ......................... in that company for five years

a work b have worked c worked d are working

6 she likes watching the stars ........................night

a at b on c for d in

7 my father suggests ............................. a trip to the countryside on saturday a to have b had c have d having

8 he loves his parents very much and wants them to be .............................. a happily b happiness c happy d happiest

9 she can not go to the party because she will have to ...............her little sister a look up

b look for

c look after

d look at

10 an : shall we go out to choose a birthday gift for mary ? phuc ; ................

a;good idea

b happy birthday

c yes , please do

d are you sure ?

11 . lan is very tired . ........ , she has to finish her work before going to bed a so b although c however d therefore

12 we will meet david , ....................... comes from england

a whom b that c which d who

13 where is linh now - she ........................... be in the school library

a may b should c will d ought

1 we did not visit the museum because we had no time a if we have time , we will visit the museum b if we had time , we would visit the museum c if we had had time , we would have visited the museum d if we had had time , we will visit the museum 2 he looked frightened as if he ................ a ghost a sees b is seeing c has seen d had seen 3 ........... resigned , we would have been forced to sack him a had he not b had not he c he had not d he not had 4 if you ................ me about the...
Đọc tiếp

1 we did not visit the museum because we had no time a if we have time , we will visit the museum b if we had time , we would visit the museum c if we had had time , we would have visited the museum d if we had had time , we will visit the museum 2 he looked frightened as if he ................ a ghost a sees b is seeing c has seen d had seen 3 ........... resigned , we would have been forced to sack him a had he not b had not he c he had not d he not had 4 if you ................ me about the bad service , we’d have eaten there a did not tell b would not have told c had not told d had told 5 the teacher was absent today, so class was canceled . if she ........... absent again tomorrow , class ........ tomorrow,too a is/will cancel b is / will be canceled c was / would be canceled d was/ would cancel 6 if you .................. to my advice in the first place , you............... in this mess right now a listen/will be b had listened / would not have been c will listened / would not be d had listened/ would not be 7 if i had been absent from class yesterday , i ............. the math test a would missed b would have missed c will miss d miss 8 if you ............... here earlier , you ............. her a had come / would have met b come / meet c came / would meet d comes will meet 9 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 10 if i were , i would work harder a you would rather not work so hard c you should work harder c you should work with me d do not work so hard

1
27 tháng 4 2017

1 we did not visit the museum because we had no time

a if we have time , we will visit the museum

b if we had time , we would visit the museum

c if we had had time , we would have visited the museum

d if we had had time , we will visit the museum

2 he looked frightened as if he ................

a ghost a sees b is seeing c has seen d had seen

3 ........... resigned , we would have been forced to sack him

a had he not b had not he c he had not d he not had

4 if you ................ me about the bad service , we’d have eaten there

a did not tell b would not have told c had not told d had told

5 the teacher was absent today, so class was canceled . if she ........... absent again tomorrow , class ........ tomorrow,too

a is/will cancel b is / will be canceled c was / would be canceled d was/ would cancel

6 if you .................. to my advice in the first place , you............... in this mess right now

a listen/will be b had listened / would not have been c will listened / would not be d had listened/ would not be

7 if i had been absent from class yesterday , i ............. the math test

a would missed b would have missed c will miss d miss

8 if you ............... here earlier , you ............. her

a had come / would have met b come / meet c came / would meet d comes will meet

9 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

10 if i were , i would work harder

a you would rather not work so hard

b you should work harder

c you should work with me

d do not work so hard

1 we can not have our car now ,................................. at the garage a it's still being repalred b it's still repairing c it's still repaired d it's still being repairing 2 john .......................you when he has finished the report a was calling b was being called c will call d will be called 3 the house .................... six decades ago a was built b was building c will be built d was to be built 4 the building ...................... a is being demolished b is demolishing c...
Đọc tiếp

1 we can not have our car now ,................................. at the garage a it's still being repalred b it's still repairing c it's still repaired d it's still being repairing 2 john .......................you when he has finished the report a was calling b was being called c will call d will be called 3 the house .................... six decades ago a was built b was building c will be built d was to be built 4 the building ...................... a is being demolished b is demolishing c has demolished d been demolished 5 while i ...................... this morning , i met jane a shop b shopping c was shopping d am shopping 6 wait here until i ....................you a am calling b am going to call c call d will call 7 this room ....................... for ages a has not used b has not been used c has not used d has not been used 8 i am like to have my shoes .................at once a repair b repairing c repaied d being repaired 9 i am going to have my house ........................this weekend a is redecorated b redecorated c will be redecorated d redecorate 10 my shoes need ......................... a to clean b cleaning c to be cleaned d b and c 11 pupils are made ...................hard at school a work b to work c working d worked 12 the factory is said .............................. in a fire two years ago a being destroyed b to have been destroyed c to have destroyed d to destroy

1
22 tháng 5 2017

1 we can not have our car now ,................................. at the garage

a it's still being repaired b it's still repairing c it's still repaired d it's still being repairing

2 john .......................you when he has finished the report

a was calling b was being called c will call d will be called

3 the house .................... six decades ago

a was built b was building c will be built d was to be built

4 the building ......................

a is being demolished b is demolishing c has demolished d been demolished

5 while i ...................... this morning , i met jane

a shop b shopping c was shopping d am shopping

6 wait here until i ....................you

a am calling b am going to call c call d will call

7 this room ....................... for ages

a has not used b has not been used c has not used d has not been used

8 i am like to have my shoes .................at once

a repair b repairing c repaired d being repaired

9 i am going to have my house ........................this weekend

a is redecorated b redecorated c will be redecorated d redecorate

10 my shoes need .........................

a to clean b cleaning c to be cleaned d b and c

11 pupils are made ...................hard at school

a work b to work c working d worked

12 the factory is said .............................. in a fire two years ago

a being destroyed b to have been destroyed c to have destroyed d to destroy

Choose the best answer among A, B, C, or D. 1. When I last saw him, he _____ in London. A. has lived B. is living C. was living D. has been living 2. We _______ Dorothy since last Saturday. A. don't see B. haven't seen C. didn't see D. hadn't seen 3. The train ______ half an hour ago. A. has been leaving B. left C. has left D. had left 4. Jack ______ the door. A. has just painted B. paint C. will have painted D. painting 5. My sister ________ for you since yesterday. A. is looking B....
Đọc tiếp

Choose the best answer among A, B, C, or D.

1. When I last saw him, he _____ in London.

A. has lived B. is living C. was living D. has been living

2. We _______ Dorothy since last Saturday.

A. don't see B. haven't seen C. didn't see D. hadn't seen

3. The train ______ half an hour ago.

A. has been leaving B. left C. has left D. had left

4. Jack ______ the door.

A. has just painted B. paint C. will have painted D. painting

5. My sister ________ for you since yesterday.

A. is looking B. was looking C. has been looking D. looked

6. I ______ Texas State University now.

A. am attending B. attend

C. was attending D. attended

7. He has been selling motorbikes ________.

A. ten years ago B. since ten years C. for ten years ago D. for ten years

8. Christopher Columbus _______ American more than 500 years ago.

A. discovered B. has discovered C. had discovered D. had been discovering

9. He fell down when he ______ towards the church.

A. run B. runs C. was running D. had run

10. We _______ there when our father died.

A. still lived B. lived still C. was still lived D. was still living

11. They ______ table tennis when their father comes back home.

A. will play B. will be playing C. play D. would play

12. By Christmas, I _______ for Mr. Smith for six years.

A. will have been working B. will work C. have been working D. will be working

13. I _______ in the room right now.

A. am being B. was being C. have been being D. am

14. I ______ to New York three times this year.

A. have been B. was C. were D. had been

15. I'll come and see you before I _______ for the States.

A. leave B. will leave C. have left D. shall leave

16. The little girl asked what _______ to her friend.

A. has happened B. happened

C. had happened D. would have been happened

17. John ______ a book when I saw him.

A. is reading B. read C. was reading D. reading

18. He said he _______ return later.

A. will B. would C. can D. would be

19. Jack ________ the door.

A. has just opened B. open

C. have opened D. opening

20. I have been waiting for you ______.

A. since early morning B. since 9 a.m

C. for two hours D. All are correct

2
2 tháng 2 2018

Choose the best answer among A, B, C, or D.

1. When I last saw him, he _____ in London.

A. has lived B. is living C. was living D. has been living

2. We _______ Dorothy since last Saturday.

A. don't see B. haven't seen C. didn't see D. hadn't seen

3. The train ______ half an hour ago.

A. has been leaving B. left C. has left D. had left

4. Jack ______ the door.

A. has just painted B. paint C. will have painted D. painting

5. My sister ________ for you since yesterday.

A. is looking B. was looking C. has been looking D. looked

6. I ______ Texas State University now.

A. am attending B. attend

C. was attending D. attended

7. He has been selling motorbikes ________.

A. ten years ago B. since ten years C. for ten years ago D. for ten years

8. Christopher Columbus _______ American more than 500 years ago.

A. discovered B. has discovered C. had discovered D. had been discovering

9. He fell down when he ______ towards the church.

A. run B. runs C. was running D. had run

10. We _______ there when our father died.

A. still lived B. lived still C. was still lived D. was still living

11. They ______ table tennis when their father comes back home.

A. will play B. will be playing C. play D. would play

12. By Christmas, I _______ for Mr. Smith for six years.

A. will have been working B. will work C. have been working D. will be working

13. I _______ in the room right now.

A. am being B. was being C. have been being D. am

14. I ______ to New York three times this year.

A. have been B. was C. were D. had been

15. I'll come and see you before I _______ for the States.

A. leave B. will leave C. have left D. shall leave

16. The little girl asked what _______ to her friend.

A. has happened B. happened

C. had happened D. would have been happened

17. John ______ a book when I saw him.

A. is reading B. read C. was reading D. reading

18. He said he _______ return later.

A. will B. would C. can D. would be

19. Jack ________ the door.

A. has just opened B. open

C. have opened D. opening

20. I have been waiting for you ______.

A. since early morning B. since 9 a.m

C. for two hours D. All are correct

1. When I last saw him, he _____ in London.

A. has lived B. is living C. was living D. has been living

2. We _______ Dorothy since last Saturday.

A. don't see B. haven't seen C. didn't see D. hadn't seen

3. The train ______ half an hour ago.

A. has been leaving B. left C. has left D. had left

4. Jack ______ the door.

A. has just painted B. paint C. will have painted D. painting

5. My sister ________ for you since yesterday.

A. is looking B. was looking C. has been looking D. looked

6. I ______ Texas State University now.

A. am attending B. attend

C. was attending D. attended

7. He has been selling motorbikes ________.

A. ten years ago B. since ten years C. for ten years ago D. for ten years

8. Christopher Columbus _______ American more than 500 years ago.

A. discovered B. has discovered C. had discovered D. had been discovering

9. He fell down when he ______ towards the church.

A. run B. runs C. was running D. had run

10. We _______ there when our father died.

A. still lived B. lived still C. was still lived D. was still living

11. They ______ table tennis when their father comes back home.

A. will play B. will be playing C. play D. would play

12. By Christmas, I _______ for Mr. Smith for six years.

A. will have been working B. will work C. have been working D. will be working

13. I _______ in the room right now.

A. am being B. was being C. have been being D. am

14. I ______ to New York three times this year.

A. have been B. was C. were D. had been

15. I'll come and see you before I _______ for the States.

A. leave B. will leave C. have left D. shall leave

16. The little girl asked what _______ to her friend.

A. has happened B. happened

C. had happened D. would have been happened

17. John ______ a book when I saw him.

A. is reading B. read C. was reading D. reading

18. He said he _______ return later.

A. will B. would C. can D. would be

19. Jack ________ the door.

A. has just opened B. open

C. have opened D. opening

20. I have been waiting for you ______.

A. since early morning B. since 9 a.m

C. for two hours D. All are correct