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9 tháng 9 2020

She __ her lessons while I was watching television.

A, has studied

B, is studying

C, was studying

D, has been studying

23 tháng 11 2018

Chọn đáp án đúng:

1) The Olympic Games ... every fours years

A. take place B. takes place

C. took place D. is taking place

2) Tim was tired. He ... hard all day

A. has been studying B. studies

C. studied D. had been studying

3) It's a nice day. I ... we go out for a walk

A. suggested B. suggest

C. is suggesting D. are suggesting

4) It ... dark. Shall I turn on the light?

A. is getting B. get

C. got D. have got

5) I... for Christine. Do you know where she is?

A. look B. looked

C. am looking D. looks

23 tháng 11 2018

Chọn đáp án đúng:

1) The Olympic Games ... every fours years

A. take place B. takes place

C. took place D. is taking place

2) Tim was tired. He ... hard all day

A. has been studying B. studies

C. studied D. had been studying

3) It's a nice day. I ... we go out for a walk

A. suggested B. suggest

C. is suggesting D. are suggesting

4) It ... dark. Shall I turn on the light?

A. is getting B. get

C. got D. have got

5) I... for Christine. Do you know where she is?

A. look B. looked

C. am looking D. looks

2 tháng 2 2016

1. D

2. B

3. D

4. B

                                  Do homework

      1:lost/has been

2:was waiting

3:supportive

4:studying

81. When I get my degree, I _______ IELTS for 6 months.A. study B. have studied C. am studying D. will have been studying82. When we ____________ TV, the bell rang.A. watched B. were watching C. will watch D. have watched83. When she arrived at the airport, her flight ___________ off.A. took B. have taken C. had taken D. takes84. We____________ each other before 2010.A. don’t met B. haven’t met C. wasn’t meeting D. hadn’t met85. By the time I arrived, they___ for 3 hours.A. had played B. played...
Đọc tiếp

81. When I get my degree, I _______ IELTS for 6 months.
A. study B. have studied C. am studying D. will have been studying
82. When we ____________ TV, the bell rang.
A. watched B. were watching C. will watch D. have watched
83. When she arrived at the airport, her flight ___________ off.
A. took B. have taken C. had taken D. takes
84. We____________ each other before 2010.
A. don’t met B. haven’t met C. wasn’t meeting D. hadn’t met
85. By the time I arrived, they___ for 3 hours.
A. had played B. played C. were playing D. had been playing
86. Mike_____________ video games last year.
A. usually plays B. had played C. played often D. usually played
87. It ___________ for 2 days before the storm came yesterday.
A. had been raining B. rained C. has rained D. was raining
88. They_________ swimming at 3 p.m yesterday afternoon.
A. was going B. had gone C. go D. have been going
89. World Cup ____________ tonight.
A. begin B. will begin C. began D. are beginning
90. This time next year I ______ Ha Long Bay.
A. visit B. have visited C. will be visiting D. will have visiting
91. When I get my degree, I _______ IELTS for 6 months.
A. study B. have studied C. am studying D. will have been studying
92. Suri ____________ dinner with her grandparents at this time tomorrow.
A. has B. is having C. would have D. will be having
93. We__________ TV at 7 p.m tomorrow.
A. will be watching B. were watching C. watch D. watched
94. My brother________ before 2020.
A. graduates B. is graduating C. will have graduated D. will graduated
95. We __ for an hour when it suddenly rained.
A. have run B. had been running C. were running D. ran

96. I _________ up my room before you arrive.
A. shall have cleaned B. shall cleaned C. cleaned D. am cleaning
97. __________ you __________ in this town for 10 years by the end of this year?
A. Will / have been living B. Do / live C. Are / living D. Have / been living
98. Tom_____________ his grandparents yet.
A. haven’t met B. Didn’t met C. won’t meet D. hasn’t met
99. I_________________ Paris next year.
A. am going to visit B. am going to visiting C. visit D. will have visited
100. She_________________ Vietnam by the end of next year.
A. is leaving B. will have left C. leaves D. left

1
29 tháng 7 2023

81. When I get my degree, I _______ IELTS for 6 months.
A. study B. have studied C. am studying D. will have been studying
82. When we ____________ TV, the bell rang.
A. watched B. were watching C. will watch D. have watched
83. When she arrived at the airport, her flight ___________ off.
A. took B. have taken C. had taken D. takes
84. We____________ each other before 2010.
A. don’t met B. haven’t met C. wasn’t meeting D. hadn’t met
85. By the time I arrived, they___ for 3 hours.
A. had played B. played C. were playing D. had been playing
86. Mike_____________ video games last year.
A. usually plays B. had played C. played often D. usually played
87. It ___________ for 2 days before the storm came yesterday.
A. had been raining B. rained C. has rained D. was raining
88. They_________ swimming at 3 p.m yesterday afternoon.
A. was going B. had gone C. go D. have been going
89. World Cup ____________ tonight.
A. begin B. will begin C. began D. are beginning
90. This time next year I ______ Ha Long Bay.
A. visit B. have visited C. will be visiting D. will have visiting
91. When I get my degree, I _______ IELTS for 6 months.
A. study B. have studied C. am studying D. will have been studying
92. Suri ____________ dinner with her grandparents at this time tomorrow.
A. has B. is having C. would have D. will be having
93. We__________ TV at 7 p.m tomorrow.
A. will be watching B. were watching C. watch D. watched
94. My brother________ before 2020.
A. graduates B. is graduating C. will have graduated D. will graduated
95. We __ for an hour when it suddenly rained.
A. have run B. had been running C. were running D. ran

96. I _________ up my room before you arrive.
A. shall have cleaned B. shall cleaned C. cleaned D. am cleaning
97. __________ you __________ in this town for 10 years by the end of this year?
A. Will / have been living B. Do / live C. Are / living D. Have / been living
98. Tom_____________ his grandparents yet.
A. haven’t met B. Didn’t met C. won’t meet D. hasn’t met
99. I_________________ Paris next year.
A. am going to visit B. am going to visiting C. visit D. will have visited
100. She_________________ Vietnam by the end of next year.
A. is leaving B. will have left C. leaves D. left

5 tháng 7 2016

a/ Cô có khoa học nghiên cứu máy tính từ năm ngoái.
Cô đang học tôi gặp nhau vào năm cuối cùng của cô.
Cô (không bao giờ) nghiên cứu bài học này bởi vì cô ấy không thích nó.
Cô chưa bao giờ học bài học này trước khi.
Cô đã (không bao giờ) đã nghiên cứu bài học này một lần nữa.
Cô (không bao giờ) đã nghiên cứu bài học này tháng trước.
Cô đã không (chưa) đã nghiên cứu bài học này cho đến ngày hôm qua.

b/ Thì Hiện tại hoàn thành

c/ Vì các từ đó chia theo các dấu hiệu ở hiện tại hoàn thành 

5 tháng 7 2016

Mình nghĩ zậy hình như câu 2 hk phải HTHT

Sylvia Earle, underwater hero She has spent her working life studying the world's oceans Sylvia Earle is an underwater explorer and marine biologist who was born in the USA in 1935. She became interested in the world's oceans from an early age. As a child, she liked to stand on the beach for hours and look at the sea, wondering what it must be like under the surface.When she was 16, she finally got a chance to make her first dive. It was this dive that inspired her to become an underwater...
Đọc tiếp

Sylvia Earle, underwater hero She has spent her working life studying the world's oceans Sylvia Earle is an underwater explorer and marine biologist who was born in the USA in 1935. She became interested in the world's oceans from an early age. As a child, she liked to stand on the beach for hours and look at the sea, wondering what it must be like under the surface.

When she was 16, she finally got a chance to make her first dive. It was this dive that inspired her to become an underwater explorer. Since then, she has spent more than 6,500 hours under water, and has led more than seventy expeditions worldwide. She has also made the deepest dive ever, reaching a record-breaking depth of 381 metres.

In 1970, she became famous around the world when she became the captain of the first all-female team to live under water. The team spent two weeks in an underwater 'house'. The research they carried out showed the damage that pollution was causing to marine life, and especially to coral reefs. Her team also studied the problem of over-fishing. Fishing methods meant that people were catching too many fish, Earle warned, and many species were in danger of becoming extinct.

Since then she has written several books and magazine articles in which she suggests ways of reducing the damage that is being done to the world's oceans. One way, she believes, is to rely on fish farms for seafood, and reduce the amount of fishing that is done out at sea. Although she no longer eats seafood herself, she realises the importance it plays in our diets. It would be wrong to tell people they should stop eating fish from the sea, she says. However, they need to reduce the impact they are having on the ocean's supplies.

Choose NO MORE THAN TWO WORDS AND/OR A NUMBER FROM THE PASSAGE for each answer.

1. What career did Sylvia decide to follow after her first dive? ……………………………………………………………………….

2. How far under water did she go in order to break a world record? ……………………………………………………………………….

3. What was causing harm to everything living in the sea? ……………………………………………………………………….

4. Where does Sylvia think we should get our fish from? ……………………………………………………………………….

Decide if these statements are TRUE, FALSE or NOT GIVEN according to the information in the passage.

1. …… Sylvia Earle lives in the USA.

2. …… At the age of 18, she hadn’t made any dive.

3. …… The experience of a close death by drowning caused her to become an underwater explorer.

4. …… Nobody in the world has dived a further depth than Sylvia Earle.

5. …… The team made a fortnight stay in a laboratory to studied the underwater house.

6. …… Until 1970, nobody had lived underwater before.

7. …… Sylvia Earle was worried about the amount of fish that were being caught.

8. …… Although people were catching too many fishes, marine life suffered from no extinct dangers as the ocean were huge with a great many kinds of fishes.

9. …… Her books offer some solutions to marine problems.

10. …… She thinks people should avoid eating seafood

2
6 tháng 7 2021

Choose NO MORE THAN TWO WORDS AND/OR A NUMBER FROM THE PASSAGE for each answer.

1. What career did Sylvia decide to follow after her first dive? ……………underwater explorer………………………………………………………….

2. How far under water did she go in order to break a world record? ………She went to 381 meters underwater to break the world record ……………………………………………………………….

3. What was causing harm to everything living in the sea? …………The research they carried out showed the damage that pollution was causing to marine life…………………………………………………………….

4. Where does Sylvia think we should get our fish from? ………… She thinks we should get our fish from fish farms…………………………………………………………….

Decide if these statements are TRUE, FALSE or NOT GIVEN according to the information in the passage.

1. …T… Sylvia Earle lives in the USA.

2. …F… At the age of 18, she hadn’t made any dive.

3. …NG… The experience of a close death by drowning caused her to become an underwater explorer.

4. …T… Nobody in the world has dived a further depth than Sylvia Earle.

5. …F… The team made a fortnight stay in a laboratory to studied the underwater house.

6. …F… Until 1970, nobody had lived underwater before.

7. …T… Sylvia Earle was worried about the amount of fish that were being caught.

8. …F… Although people were catching too many fishes, marine life suffered from no extinct dangers as the ocean were huge with a great many kinds of fishes.

9. …T… Her books offer some solutions to marine problems.

10. …F… She thinks people should avoid eating seafood

6 tháng 7 2021

8.   We should brush our teeth carefully after meals.

      Our teeth should be brushed carefully after meals.

9.   Everyone must observe the traffic rules strictly.

      The traffic rules must be observed strictly.

10. They did their homework well.

      Their homework was done well.

   11. I hate having to do homework every night.

         I wish I didn't have to do homework every night.

   12. What a pity I don’t live near my work.

         I wish I lived near my work.

   13. What a pity I can’t speak Bahasa Malaysia.

         I wish I could speak Bahasa Malaysia.

   14. She talks too much in class.

         I wish  she didn't talk too much in class.

   15. My neighbor always makes a lot of noise at night.

         I wish my neighbor didn't always make a lot of noise at night.

4 tháng 4 2023

...her sick mother, she stayed at home

........so that I can keep pace with my classmate

........such an untidy room that nobody wants to live in

.........in order that we can have better communication with other people

1. I didn't see the TV programme but everybody said it was excellent. I wish I ___ it. * 5 điểm A. saw B. would see C. had seen D. seen 2. My internet service is so slow. I wish it _________faster , so I can study online effectively. * 5 điểm A. is B. were C. has been D. had...
Đọc tiếp
1. I didn't see the TV programme but everybody said it was excellent. I wish I ___ it. * 5 điểm A. saw B. would see C. had seen D. seen 2. My internet service is so slow. I wish it _________faster , so I can study online effectively. * 5 điểm A. is B. were C. has been D. had been 3. Peter wishes you __________ stop interrupting him whenever he speaks. * 5 điểm A. will B. would C. could D. might 5. John wishes he ________ a scientist when he grows up. * 5 điểm A. is B. was C. will be D. would be 6. I wish I __________ you some money for your rent now, but I’m broke myself. * 5 điểm A. can lend B. would lend C. could lend D. will lend 7. If only all schoolchildren __________ no problems with the internet service when they study online. * 5 điểm A. had B. have C. didn’t have D. don’t have 8. Non-smokers wish smoking __________ banned in public buildings and public transportation. * 5 điểm A. would be B. were not C. must be D. has been 9. I wish everyone _____ the government’s instructions now. * 5 điểm A. follows B. followed C. had followed D. follow 10. I wish you ___________ whistling while I am trying to concentrate. * 5 điểm A. will stop B. should stop C. would stop D. had stopped 11. COVID-19 is so terrible; I really wish we_____ it soon. * 5 điểm A. would stop B. will stop C. stopped D. stop 12. My sister can’t join Zoom meetings for studying online. * 5 điểm A. I wish my sister to join Zoom meetings for studying online. B. I wish my sister could join Zoom meetings for studying online. C. Joining Zoom meetings for studying online is a wish. D. My sister wishes to be joined Zoom meetings for studying online. 13. My friends spend more time playing computer games and less time studying. * 5 điểm A. I wish my friends spend less time playing computer games and more time studying. B. If only my friends spent more time playing computer games and less time studying. C. I wish my friends spend more time playing computer games and less time studying. D. I wish my friends spent less time playing computer games and more time studying. 14. My friends didn’t take part in the Young Pioneer activities and they regret it now. * 5 điểm A. My friends wish they took part in the Young Pioneer activities. B. My friends wish they had taken part in the Young Pioneer activities. C. My friends wish they would take part in the Young Pioneer activities. D. My friends wish they did take part in the Young Pioneer activities. 18. I wish/ everybody/ aware/ the importance/ staying home/when the pandemic/ everywhere. * 5 điểm A. I wish everybody is aware of the importance of staying home when the pandemic is everywhere. B. I wish everybody were aware of the importance of staying home when the pandemic is everywhere. C. I wish everybody was awareness of the importance of staying home when the pandemic is everywhere. D. I wish everybody has been aware of the importance of staying home when the pandemic is everywhere. 19. I wish/ students/ come back/ school/ soon/ * 5 điểm A. I wish students will come back to school soon. B. I wish students would come back to school soon. C. I wish students can come back to school soon. D. I wish students had come back to school soon. 20. I wish/ there/ be / more students/ do/ online test/ last week/ * 5 điểm A. I wish there were more students to do the online test last week. B. I wish there had been more students to do the online test last week. C. I wish there are more students to do the online test last week. D. I wish there would be more students to do the online test last week.
1
5 tháng 5 2021

1. I didn't see the TV program but everybody said it was excellent. I wish I ___ it.

A. saw

B. would see

C. had seen

D. seen

2. My internet service is so slow. I wish it _________faster , so I can study online effectively.

A. is

B. was

C. has been

D. had been

3. Peter wishes you __________ stop interrupting him whenever he speaks.

A. will

B. would

C. could

D. might

4. Mai: "Vietnamese medical staff is very dedicated to helping save people in the fight against COVID-19."

Nam: “Yes. I wish I_________ a good doctor like them in the future."

A. am

B. will be

C. would be

D. have been

5. John wishes he ________ a scientist when he grows up.

A. is

B. was

C. will be

D. would be

6. I wish I __________ you some money for your rent now, but I’m broke myself.

A. can lend

B. would lend

C. could lend

D. will lend

7. If only all schoolchildren __________ no problems with the internet service when they study online.

A. had

B. have

C. didn’t have

D. don’t have

8. Non-smokers wish smoking __________ banned in public buildings and public transportation.

A. would be

B. was not

C. must be

D. has been

9. I wish everyone _____ the government’s instructions now.

A. follows

B. followed

C. had followed

D. follow

10. I wish you ___________ whistling while I am trying to concentrate.

A. will stop

B. should stop

C. would stop

D. had stopped

11. COVID-19 is so terrible; I really wish we_____ it soon.

A. would stop

B. will stop

C. stopped

D. stop

12. My sister can’t join Zoom meetings for studying online.

A. I wish my sister to join Zoom meetings for studying online.

B. I wish my sister could join Zoom meetings for studying online.

C. Joining Zoom meetings for studying online is a wish.

D. My sister wishes to be joined Zoom meetings for studying online.

13. My friends spend more time playing computer games and less time studying.

A. I wish my friends spend less time playing computer games and more time studying.

B. If only my friends spent more time playing computer games and less time studying.

C. I wish my friends spend more time playing computer games and less time studying.

D. I wish my friends spent less time playing computer games and more time studying.

14. My friends didn’t take part in the Young Pioneer activities and they regret it now.

A. My friends wish they took part in the Young Pioneer activities.

B. My friends wish they had taken part in the Young Pioneer activities.

C. My friends wish they would take part in the Young Pioneer activities.

D. My friends wish they did take part in the Young Pioneer activities.

18. I wish/ everybody/ aware/ the importance/ staying home/when the pandemic/ everywhere.

A. I wish everybody is aware of the importance of staying home when the pandemic is everywhere.

B. I wish everybody were aware of the importance of staying home when the pandemic is everywhere.

C. I wish everybody was aware of the importance of staying home when the pandemic is everywhere.

D. I wish everybody has been aware of the importance of staying home when the pandemic is everywhere.

19. I wish/ students/ come back/ school/ soon/

A. I wish students will come back to school soon.

B. I wish students would come back to school soon.

C. I wish students can come back to school soon.

D. I wish students had come back to school soon.

20. I wish/ there/ be / more students/ do/ online test/ last week/

A. I wish there were more students to do the online test last week.

B. I wish there had been more students to do the online test last week.

C. I wish there are more students to do the online test last week.

D. I wish there would be more students to do the online test last week

Choose one sentence that is closest in meaning to the root one. 1. If Harry keeps on studying as he has been, he'll have no trouble passing his exams. a. Harry will not pass his exams because he is not studying hard. b. Harry is studying hard to pass his exams. c. Harry studies very hard, so he passes all of his exams d. Harry continues studying very hard, but he has trouble passing his exams 2. While we're on vacation, Mary will look after the dog a. We're going to buy a dog for Mary...
Đọc tiếp

Choose one sentence that is closest in meaning to the root one.

1. If Harry keeps on studying as he has been, he'll have no trouble passing his exams.

a. Harry will not pass his exams because he is not studying hard.

b. Harry is studying hard to pass his exams.

c. Harry studies very hard, so he passes all of his exams

d. Harry continues studying very hard, but he has trouble passing his exams

2. While we're on vacation, Mary will look after the dog

a. We're going to buy a dog for Mary after returning from our vacation.

b. If we go on vacation, Mary will take our dog

c. Mary will pay attention to our dog while we're on vacation

d. Mary will take care of our dog while we're on vacation.

3. I ran into Peter, a friend of mine on my way to work this morning

a. Peter and I ran to work this morning.

b. I met Peter unexpectedly on my way to work this mormıng

c. I bad an job appointment with Peter this morning

d. Peter and I met a friend this morning.

4. Why don't you use energy-saving bulbs, Mr. Son?' said Na

a. Nam remind Mr. Son to use energy-saving bulbs.

b. Nam asked Mr. Son not to use energy-saving bulbs.

c. Nam suggested that Mr. Son should use energy-saving bulbs.

d. Nam had Mr.Son replaced energy-saving bulbs.

5. We couldn't go swimming because the sea was too rough.

a. The sea was not calm. However, we still went swimming

b. We could go swimming because of the rough sea.

c. We went swimming although the sea was very rough.

d. The sea was very rough. Therefore, we couldn't go swimming.

2
24 tháng 11 2018

Choose one sentence that is closest in meaning to the root one.

1. If Harry keeps on studying as he has been, he'll have no trouble passing his exams.

a. Harry will not pass his exams because he is not studying hard.

b. Harry is studying hard to pass his exams.

c. Harry studies very hard, so he passes all of his exams

d. Harry continues studying very hard, but he has trouble passing his exams

2. While we're on vacation, Mary will look after the dog

a. We're going to buy a dog for Mary after returning from our vacation.

b. If we go on vacation, Mary will take our dog

c. Mary will pay attention to our dog while we're on vacation

d. Mary will take care of our dog while we're on vacation.

3. I ran into Peter, a friend of mine on my way to work this morning

a. Peter and I ran to work this morning.

b. I met Peter unexpectedly on my way to work this mormıng

c. I bad an job appointment with Peter this morning

d. Peter and I met a friend this morning.

4. Why don't you use energy-saving bulbs, Mr. Son?' said Na

a. Nam remind Mr. Son to use energy-saving bulbs.

b. Nam asked Mr. Son not to use energy-saving bulbs.

c. Nam suggested that Mr. Son should use energy-saving bulbs.

d. Nam had Mr.Son replaced energy-saving bulbs.

5. We couldn't go swimming because the sea was too rough.

a. The sea was not calm. However, we still went swimming

b. We could go swimming because of the rough sea.

c. We went swimming although the sea was very rough.

d. The sea was very rough. Therefore, we couldn't go swimming.

24 tháng 11 2018

Choose one sentence that is closest in meaning to the root one.

1. If Harry keeps on studying as he has been, he'll have no trouble passing his exams.

a. Harry will not pass his exams because he is not studying hard.

b. Harry is studying hard to pass his exams.

c. Harry studies very hard, so he passes all of his exams

d. Harry continues studying very hard, but he has trouble passing his exams

2. While we're on vacation, Mary will look after the dog

a. We're going to buy a dog for Mary after returning from our vacation.

b. If we go on vacation, Mary will take our dog

c. Mary will pay attention to our dog while we're on vacation

d. Mary will take care of our dog while we're on vacation.

3. I ran into Peter, a friend of mine on my way to work this morning

a. Peter and I ran to work this morning.

b. I met Peter unexpectedly on my way to work this mormıng

c. I bad an job appointment with Peter this morning

d. Peter and I met a friend this morning.

4. Why don't you use energy-saving bulbs, Mr. Son?' said Na

a. Nam remind Mr. Son to use energy-saving bulbs.

b. Nam asked Mr. Son not to use energy-saving bulbs.

c. Nam suggested that Mr. Son should use energy-saving bulbs.

d. Nam had Mr.Son replaced energy-saving bulbs.

5. We couldn't go swimming because the sea was too rough.

a. The sea was not calm. However, we still went swimming

b. We could go swimming because of the rough sea.

c. We went swimming although the sea was very rough.

d. The sea was very rough. Therefore, we couldn't go swimming.

1.My mother _______ the newspaper now. A. read B.reads C.reading D. is reading 2. Those children _______ for 2 hours every afternoon. A. sleep B. sleeps C. is sleeping D. are sleeping 3.We always _______ our English lessons carefully. A. do B. does C. is doing D. are doing 4. At present, he _______ for a foreign company. A. work B. works C. is working D. are working 5.The earth _______ around the sun once every 365 days. A. go B. goes C. is going D. are going 6.Where _______ now ? I...
Đọc tiếp

1.My mother _______ the newspaper now.

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

2. Those children _______ for 2 hours every afternoon.

A. sleep B. sleeps C. is sleeping D. are sleeping

3.We always _______ our English lessons carefully.

A. do B. does C. is doing D. are doing

4. At present, he _______ for a foreign company.

A. work B. works C. is working D. are working

5.The earth _______ around the sun once every 365 days.

A. go B. goes C. is going D. are going

6.Where _______ now ? I _______ to the theatre.

A. do you go/go B. are you going/ go

C. are you going/ are going D. are you going/ am going

7. The students _______ all of the new words very well now.

A. know B. knows C. is knowing D. are knowing

8. Just a minute! I _______ that word in the dictionary.

A.look B. looks C. looking D. am looking

8. Just a minute! I _______ that word in the dictionary.

A.look B. looks C. looking D. am looking

9. We _______ the use of verbs in English at the moment.

A. study B. studies C. is studying D. are studying

10.The teacher _______ at the board when he _______ to explain something.

A. point/ want B. points/wants C.points/ is wanting D. is pointing/ is wanting

11. It _______ when I got up this morning.

A. rains B. rained C. is raining D. was raining

12. Albert Einstein _______ in 1955.

A. dies B. is dying C. died D. was dying

13. They _______ in the library when the fire alarm went off.

A. study B. are studying C. studied D. were studying

14. What _______ when you arrived there?

A. does she do B. she did C.was she doing D. were she doing

15. He _______ economics at Harvard for almost 50 years.

A. teach B. taught C.was teaching D. were teaching

16. Helen _______ in the lobby, wasn’t she?

A. works B. worked C. was working D. wrere working

17.Mr. Thanh _______ to the office twice yesterday.

A. goes B. went C. was working D. were working

18. The wind _______ very hard when I went out this morning.

A. blows B. is blowing C. was blowinng D. were blowing

19. He fell while he _______ down the stairs.

A. goes B. is going C. was going D. were going

20. What _______ when you saw him ? He _______ a kite.

A.does Ba do/ is flying B. did Ba do/ was flying

C. was Ba doing/ flew D. was Ba doing/ was flying

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