cho hình bình hành ABCD, gọi M, N lần lượt là trung điểm BC và AD. gọi I là giao điểm của AM và BN, K là giao điểm của DM và CN

a) chứng minh vecto AM =vecto NC

b) chứng mình vecto Dk = vecto NI

1. Vùng biển đảo nước ta có ý nghĩ như thế nào về mặt kinh tế và an ninh quốc phòng

2. Ngoài hoạt động tắm biển người ta còn có thể khai thác hoạt động du lịch nào ở biển

Đốt cháy hoàn toàn 8,4g hợp chất hữu cơ A thì thu được 26,4g CO2 và 10,8g H2O

a. Hợp chất hữu cơ A có những nguyên tố nào ?

b. Xác định công thức phân tử A, biết tỉ khối hơi của A so với hidro là 14

c. A có làm mất màu dung dịch brom không? Viết phương trình nếu có

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 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/

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

1. I didn't see the TV programme 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. were

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 are 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. were 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. She couldn’t help___________ tears when she read the news about the difficult situations of medical staff in the fight against COVID-19.

A. shed

B. to shed

C. shedding

D. sheds

12. Students stopped ________ noise when the teacher came in.

A. make

B. to make

C. making

D. made

13. My parents don’t let us _____ violent movies.

A. to watch

B. watch

C. Watching

D. watches

14. Students/ be interested/ do/ online exercises/ when/ at home.

A. Students are interested in doing online exercises when they are at home.

B. Students are interested doing online exercises when they are at home.

C. Students were interested in doing online exercises when they are at home.

D. Students were interested doing online exercises when they were at home.

15. People/ not allow/ get together/ crowded places/ everywhere/ Vietnam/ now.

A. People are not allowed to get together in crowded places everywhere in Vietnam now.

B. People are not allowed getting together in crowded places everywhere in Vietnam now.

C. People are not allowing to get together in crowded places everywhere in Vietnam now.

D. People are not allowing getting together in crowded places everywhere in Vietnam now.

16. The government/ make/ every effort/ stop/ rapid spread/ COVID-19.

A. The government has made every effort stop the rapid spread of COVID-19.

B. The government has made every effort stopping the rapid spread of COVID-19.

C. The government has made every effort to stop the rapid spread of COVID-19.

D. The government has made every effort to stop the rapidly spread of COVID-19.

6 People should give up _________ right now if they want _________ longer.

A. smoke/ lived

B. to smoke/ living

C. smoking/ to live

D. smoked/ live

7. ________ the quiz well, you need to revise online lessons carefully at https://canthotv.vn/day-hoc-tren-truyen-hinh/.

A. Do

B. Doing

C. To do

D. Done

8. When you see Lan, remember ________ her my regards, please.

A. to give

B. giving

C. give

D. gave

9. They postpone _______ the meeting due to the pandemic.

A. hold

B. to hold

C. holding

D. held

10. We hope that our students themselves will enjoy ______ the online exercises enthusiastically.

A. to do

B. doing

C. to be done

D. being done

1.Students will continue _________ back to school when the pandemic is controlled.

A. go

B. to go

C. went

D. gone

2. The teacher encourages _______ the “Teaching English on TV” program every Wednesday and Saturday morning.

A. us learn

B. us to learn

C. us learning

D. us to learning

3. Don’t forget _________ your hands regularly to protect yourselves from COVID-19.

A. wash

B. to wash

C. washing

D. washed

4. It’s no use _________ to persuade Minh. Nothing can make him ________ his mind.

A. try/ change

B. to try/ to change

C. trying/ changing

D. trying/ change

5. Ask John __________in. Don’t keep him __________ at the door.

A. to come/ to stand

B. to come/ standing

C. coming/ standing

D. coming/ to stand

1.Students will continue _________ back to school when the pandemic is controlled.

A. go

B. to go

C. went

D. gone

2. The teacher encourages _______ the “Teaching English on TV” program every Wednesday and Saturday morning.

A. us learn

B. us to learn

C. us learning

D. us to learning

3. Don’t forget _________ your hands regularly to protect yourselves from COVID-19.

A. wash

B. to wash

C. washing

D. washed

4. It’s no use _________ to persuade Minh. Nothing can make him ________ his mind.

A. try/ change

B. to try/ to change

C. trying/ changing

D. trying/ change

5. Ask John __________in. Don’t keep him __________ at the door.

A. to come/ to stand

B. to come/ standing

C. coming/ standing

D. coming/ to stand

6 People should give up _________ right now if they want _________ longer.

A. smoke/ lived

B. to smoke/ living

C. smoking/ to live

D. smoked/ live

7. ________ the quiz well, you need to revise online lessons carefully at https://canthotv.vn/day-hoc-tren-truyen-hinh/.

A. Do

B. Doing

C. To do

D. Done

8. When you see Lan, remember ________ her my regards, please.

A. to give

B. giving

C. give

D. gave

9. They postpone _______ the meeting due to the pandemic.

A. hold

B. to hold

C. holding

D. held

10. We hope that our students themselves will enjoy ______ the online exercises enthusiastically.

A. to do

B. doing

C. to be done

D. being done

11. She couldn’t help___________ tears when she read the news about the difficult situations of medical staff in the fight against COVID-19.

A. shed

B. to shed

C. shedding

D. sheds

12. Students stopped ________ noise when the teacher came in.

A. make

B. to make

C. making

D. made

13. My parents don’t let us _____ violent movies.

A. to watch

B. watch

C. Watching

D. watches

14. Students/ be interested/ do/ online exercises/ when/ at home.

A. Students are interested in doing online exercises when they are at home.

B. Students are interested doing online exercises when they are at home.

C. Students were interested in doing online exercises when they are at home.

D. Students were interested doing online exercises when they were at home.

15. People/ not allow/ get together/ crowded places/ everywhere/ Vietnam/ now.

A. People are not allowed to get together in crowded places everywhere in Vietnam now.

B. People are not allowed getting together in crowded places everywhere in Vietnam now.

C. People are not allowing to get together in crowded places everywhere in Vietnam now.

D. People are not allowing getting together in crowded places everywhere in Vietnam now.

16. The government/ make/ every effort/ stop/ rapid spread/ COVID-19.

A. The government has made every effort stop the rapid spread of COVID-19.

B. The government has made every effort stopping the rapid spread of COVID-19.

C. The government has made every effort to stop the rapid spread of COVID-19.

D. The government has made every effort to stop the rapidly spread of COVID-19.