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Viết lại câu:

1. It was waste of time to write that letter

-> I needn't..................................

2. Although the fish appears to be harmless, it is qiute dangerous

-> Contrary..................................

3. As I didn't know all the facts, I rang the police

->If..........................

4. She didn't work hard enough, so she lost the job

-> The reason..............................

5. I have no advice, which I can offer you

-> I have no..............................

6. It's a cross-country vehicle with five doors

-> It's a five.................................

7. I tried as hard as I could, but I just couldn't get the money

-> No matter...................................

8. Have you ever driven this kind of car?

-> Do you.........................................?

9. Who wrote this story?

-> By...........................................

10. Are you against working on Sunday?

-> Do you object................................

11. When I arrived in China. I wrote a letter home

-> On...................................

12. He is on the fìteenth page of the report he's typing

-> So far................................

13. I was on the point of leaving the house when the telephone rang

-> I was...............................

14. I never intended to help such a man

-> I never had.........................

15. Immerdiately after his arrival, things went wrong

-> No sooner..............................

16.While I strongly disappove of you behavior, I will help you this time

-> Despite....................................

2
11 tháng 11 2018

Viết lại câu:

1. It was waste of time to write that letter

-> I needn't..................write that letter................

3. As I didn't know all the facts, I rang the police

->If...... i had knơn all the fáct, i wouldn't have rung the police ....................

4. She didn't work hard enough, so she lost the job

-> The reason.......why she lost the job that She didn't work hard enough .......................

5. I have no advice, which I can offer you

-> I have no......advice for you........................

6. It's a cross-country vehicle with five doors

-> It's a five.........door cross-country vehicle........................

7. I tried as hard as I could, but I just couldn't get the money

-> No matter.......how hard i tried,I just couldn't get the money ............................

8. Have you ever driven this kind of car?

-> Do you........used to drive this kind of car .................................?

9. Who wrote this story?

-> By...........whom this story was written?................................

12 tháng 11 2018

Nốt :>

2. Although the fish appears to be harmless, it is qiute dangerous

-> Contrary...to harmless appearance, the fish is quite dangerous. ...

4. She didn't work hard enough, so she lost the job.
- >The reason ...why she lost the job was she did not work hard enough...

10. Are you against working on Sunday?

-> Do you object......to work on Sunday?......

11. When I arrived in China. I wrote a letter home

-> On........arriving in China,I wrote a letter home. .........

12. He is on the fìteenth page of the report he's typing

-> So far...he has typed for fifteen pages...

13. I was on the point of leaving the house when the telephone rang

-> I was.........about to leave the house when the telephone rang.......

14. I never intended to help such a man

-> I never had........an intention of helping such a man.............

15. Immerdiately after his arrival, things went wrong

-> No sooner..... had he arrived than things went wrong......

16.While I strongly disappove of you behavior, I will help you this time

-> Despite...... my strong disapproval of your behaviour, I will help you this time.....

Rewrite the sentences: 1/ The furniture was too old for us to keep => It was.................................................... 2/ John doesn't always speak the truth, I'm afraid => You can't.......................................................... 3/ I will can the police if you don't leave me alone! => Unless................................................................. 4/ Couldn't you find a better hotel? => Is this...................................... 5/ He never has enough...
Đọc tiếp

Rewrite the sentences:

1/ The furniture was too old for us to keep

=> It was....................................................

2/ John doesn't always speak the truth, I'm afraid

=> You can't..........................................................

3/ I will can the police if you don't leave me alone!

=> Unless.................................................................

4/ Couldn't you find a better hotel?

=> Is this......................................

5/ He never has enough money

=> He is always.........................

6/ This is the best essay I have ever written

=> Never......................................................

7/ There was no need for you to have gone to all that trouble

=> You...............................................................................

8/ If the work is finished by lunchtime you can go home

=> Get...........................................................................

9/ I won't go to bed. Peter will get home at midnight

=>......................................until..................................

10/ I will pay you the money. I will get a job

=> ...................................as soon as.......................

11/ It was so late that nothing could be done

=> It was too..............................................

12/ Bill is going to write to me. I will tell you all his news.

=> ........................................when....................................

2
13 tháng 6 2018

1. It was such old furniture that we couldn’t keep it

2. You can’t believe that John always speaks the truth

3. Unless you leave me alone, i will call the police

4. Is this the best hotel you could find?

5. He is always broke / short of money

6. Never in my life have I written such a good essay

7. You needn’t have gone to all that trouble

8. Get the work finished by lunchtime and you can go home

9. I won't go to bed until Peter gets home at midnight

10. I will pay you the money as soon as I get a job

11. It was too late to do anything

12. I will tell you all his news when Bill writes to me

13 tháng 6 2018

Rewrite the sentences:

1/ The furniture was too old for us to keep

=> It was such old furniture that it's not worth keeping

2/ John doesn't always speak the truth, I'm afraid

=> You can't believe that John always speaks the truth

3/ I will can the police if you don't leave me alone!

=> Unless you leave me alone,i'll call the police

4/ Couldn't you find a better hotel?

=> Is this the best hotel you could find?

5/ He never has enough money

=> He is always short of money

6/ This is the best essay I have ever written

=> Never before have I written a better essay

7/ There was no need for you to have gone to all that trouble

=> You shouldn't have gone to all that trouble

8/ If the work is finished by lunchtime you can go home

=> Get the work finished by lunchtime and you can go home

9/ I won't go to bed. Peter will get home at midnight

=>I won't go to bed until Peter gets home at midnight

10/ I will pay you the money. I will get a job

=> I will pay you the money as soon as I get a job

11/ It was so late that nothing could be done

=> It was too late for anything to be done

12/ Bill is going to write to me. I will tell you all his news.

=>I will tell you all his news when Bill writes to me
Rewrite the sentences: 1/ Keeping calm is the secret of passing your driving test => As long as .................................................................. 2/ He is on the fifteenth page of the report he's typing => So far he................................................................. 3/ My English friend finds using chopticks difficult => My English friend isn't......................................... 4/ That car's so expensive, I don't think I can buy => It's...
Đọc tiếp

Rewrite the sentences:

1/ Keeping calm is the secret of passing your driving test

=> As long as ..................................................................

2/ He is on the fifteenth page of the report he's typing

=> So far he.................................................................

3/ My English friend finds using chopticks difficult

=> My English friend isn't.........................................

4/ That car's so expensive, I don't think I can buy

=> It's such.........................................................

5/ I was on the point pf leaving the house when the telephone rang

=> I was..........................................................................................

6/ A train leaves at 7o'clock every morning

=> There is..............................................

7/ I never intended to help such a man

=> I never had...........................................

8/ I don't really like her, even though I admire her achievement

=> Much........................................................................................

9/ People deliberately start a fire, they should be punished

=> I think anyone..................................................................

10/ I think you should tellthe police about the accident.

=> If I .............................................................................

11/ "Have you got any free time next week?" Mandy asked

=> Mandy asked..............................................................

12/ I's a cross-country vehicle with five doors

=> I's a five......................................................

13/ I tried as hard as I could, but I just couldn't get the money

=> No matter..........................................................................

14/ "I've seen the film three times, Mary", said George

=> George told.....................................................................

1
13 tháng 6 2018

Rewrite the sentences:

1/ Keeping calm is the secret of passing your driving test

=> As long as you keep calm, you will pass your driving test.

2/ He is on the fifteenth page of the report he's typing

=> So far he has typed on the fifteenth page of the report.

3/ My English friend finds using chopticks difficult

=> My English friend isn't used to using chopsticks difficult.

4/ That car's so expensive, I don't think I can buy

=> It's such expensive car that I don't think I can buy

5/ I was on the point pf leaving the house when the telephone rang

=> I was about to leave the house when he telephone rang.

6/ A train leaves at 7o'clock every morning

=> There is a seven o'clovk train every morning

7/ I never intended to help such a man

=> I never had an intention of helping such a man.

8/ I don't really like her, even though I admire her achievement

Much as I admire her achievements, I don’t really like her.

9/ People deliberately start a fire, they should be punished

=> I think anyone who deliberately starts a fire should be punished.

10/ I think you should tellthe police about the accident.

=> If I were you I would tell the police about the accident.

11/ "Have you got any free time next week?" Mandy asked

=> Mandy asked if I had got any time next week.

12/ I's a cross-country vehicle with five doors

=> I's a five door cross-country vehicle

13/ I tried as hard as I could, but I just couldn't get the money

=> No matter how hard I tried , I just couldn't get the money.

14/ "I've seen the film three times, Mary", said George

=> George told mary that he had seen that film three times.

1. She didn't reply me for two weeks. (from) -> No reply ___________________ 2. They recruited very few young engineers. (any) -> Hardly _____________________ 3. Although he wasn't experienced, he got the job. -> Despite his __________________ 4. Jane seems to come to the performance late. (as if) -> It looks ______________________ 5. I don't intend to go to the university. (of) -> I have no _____________________ 6. Although Richard is competent in his work,, he does not know how to...
Đọc tiếp

1. She didn't reply me for two weeks. (from)

-> No reply ___________________

2. They recruited very few young engineers. (any)

-> Hardly _____________________

3. Although he wasn't experienced, he got the job.

-> Despite his __________________

4. Jane seems to come to the performance late. (as if)

-> It looks ______________________

5. I don't intend to go to the university. (of)

-> I have no _____________________

6. Although Richard is competent in his work,, he does not know how to deal with this client. (though)

-> Competent ___________________

7. I'm sorry I didn't come to your birthday party last night.

-> If only _______________________

8. Success depends on hard work.

-> The harder ____________________

9. Fiona was so disappointed that she could not keep on working.

-> Such ____________________

10. Without air, there would be no life on this planet.

-> If __________________________

11. Mrs.Green is proud of her son's contribution to the play.

-> Mrs. Green is proud of what ________________

12. Only two out of the five rooms we have booked have air conditioning. (of which)

-> We have booked five rooms, only ______________

13. I could not hold a big party due to mom's help.

-> Had it _______________________

14. It was wrong of you to allow a four-year-old child to walk home alone. (let)

-> You should ____________________

15. I could realize how important the family is only after I left home.

-> Not until ___________________________

1
7 tháng 10 2018

1. She didn't reply me for two weeks. (from)

-> No reply was sent me for two weeks from her

2. They recruited very few young engineers. (any)

-> Hardly did they recruited any young engineers

3. Although he wasn't experienced, he got the job.

-> Despite his lack of experience, he got the job.

4. Jane seems to come to the performance late. (as if)

-> It looks as if she will come to the performance late

5. I don't intend to go to the university. (of)

-> I have no intention of going to the university

6. Although Richard is competent in his work,, he does not know how to deal with this client. (though)

-> Though Competent in his work as Richard is,he does not know how to deal with this client.

7. I'm sorry I didn't come to your birthday party last night.

-> If only I had come to your birthday party last night.

8. Success depends on hard work.

-> The harder you work ,the more success you get

9. Fiona was so disappointed that she could not keep on working.

-> Such was Fiona's disappointment that she could not keep on working

10. Without air, there would be no life on this planet.

-> If there is no air, there will be no life on this planet.

11. Mrs.Green is proud of her son's contribution to the play.

-> Mrs. Green is pround of what her son contributed to the play

12. Only two out of the five rooms we have booked have air conditioning. (of which)

-> We have booked five rooms, only two of which have air conditioning

13. I could not hold a big party due to mom's help.

-> Had it not been for Mom’s help, I could not have held a big party.

14. It was wrong of you to allow a four-year-old child to walk home alone. (let)

-> You should not have allowed a four-year-old child to walk home alone.

15. I could realize how important the family is only after I left home.

-> Not until I left home could I realize how important the family is.

1, I didn't have enough money, so I didn't buy that latop.=> If....................................................................................2, I don't have enough money, so I can't buy that expensive dictionary.=> If...........................................................................................................3, We must do our homework well or the teacher will get angry with us.=> Unless......................................................................................4,...
Đọc tiếp

1, I didn't have enough money, so I didn't buy that latop.

=> If....................................................................................

2, I don't have enough money, so I can't buy that expensive dictionary.

=> If...........................................................................................................

3, We must do our homework well or the teacher will get angry with us.

=> Unless......................................................................................

4, You will catch a cold if you don't keep your feet dry.

=> Unless...................................................................

5, She didn't know you were in hospital, so she didn't visit you.

=> If......................................................................

6, Unless you water the plants everyday, they will die.

=> If.......................................................

7, If the police had found out him, he would have been introduce.

=> Had...........................................................

8, We couldn't have got the prize if our father hadn't encourage us.

=> If it........................................................................

9, Without Nam's help, I wouldn't have been able to slove thif difficulty.

=> If Nam.........................................................

10, John is fat because he eats so many chips.

=> If........................................................................

11, Thanks to Laura's support, I was able to finish the project.

=> Had Laura................................................................

12, With a lot of luck, you may get your novel published.

=> If you.................................................

13, My advice is that Mary should apply for that job.

=> If I...............................................................

14, We can't survice when there is no air.

=> Without................................................

15, Your warming helped prevent my failture in the test.

=> Had it......................................................................

16, They will go swimming if it is sunny.

=> Unless.............................................

17, We could have lost that match if there hadn't been efforts from everyone of us.

=> Without efforts...............................................................

* Mọi người giúp mình với =]

2
15 tháng 12 2016

1. If I had enough money, I would buy that latop.

2. If I had enough money, I could buy that expensive dictionary.

3. Unless we mustn't do our homework well, our teacher will get angry with us.

4. Unless you keep your feet dry, you will catch a cold.

5. If she knew you were in hospital, she would visit you.

6. If you don't water the plants everyday, they will die.

7. Had the police found out him. he would have been introduce.

8. If it hadn't been our father's encouragments, we couldn't have got the prize.

9. If Nam hadn't helped me, I wouldn't have been able to solve this difficulty.

10. If John didn't eat so many chips, he wouldn't be fat.

11. Had Laura not supported me, I wouldn't have been able to finish the project.

12. If you weren't lucky, you might not get your novel published.

13. If I advice Mary, my advice is that she should apply for that job.

14. Without air, we can't survice.

15. Had it not been your warming, I could't prevent my failture in the test.

16. Unless it is sunny, they won't go swimming.

17. Without efforts from everyone of us, we could have lost that match.

22 tháng 12 2016

Bạn@Phạm Thúy Hường có vẻ là bạn nhầm câu 3,8 một chút rồi bạn ạ!

3:Unless we must do our homework well ,our teacher will be very angry.

(thế này nha bạn : nếu chúng tôi không làm bài về nhà tốt thì cô giáo sẽ giận.

vì unless=if not rồi bạn ạ ,bạn không cần thiết phải cho thêm not vào vế đầu , như vây là sai rồi đó!)

8:Câu này bạn thiếu for sau hadn't been rồi nha!

Còn các câu sau thì ổn cả rồi bạn ạ!

Mình chỉ nhận xét vậy thôi nha!ok

 

5 tháng 3 2019

Q1. Rewriting

1. Although his both legs were broken in the crash, he managed to get out of the can ---> Despite his both broken legs, he managed to get out of the car in the crash

2. I haven't laten this kind of food before ----> This is the first time I've eaten this kind of food

3. It isn't necessary for you to finish by saturday ----> You don't need to finish it by Saturday

4. It was such lotten meat that it had to be thrown away ----> The meat was so rotten that it had to be thrown away

5. It is essential that professor Van helsing is met at the airport ---> Professor Van helsing must be met at the airport

6. You can't visit the USA unless you have a visa ----> If you don't have a visa, you can't visit the USA

7. He strated working as a secretary five years ago ----> She has worked as a secretary for five years

8. She knows a lot more about it than i do ---> I don't know as much about it as she does

9. My french friend finds driving on the left difficult ----> My french friend isn't used to driving on the left

10. They think the owner of the house is abroad ----> The owner of the house is thought to be abroad

11. The mechanic serviced my car last week ----> I had my car serviced by the mechanic last week

12. I'm always nervous when i travel by air ---> Traveling by air always makes me nervous

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it 1. How could I help, except to offer to lend her some money? -> Other........................... 2. We had to wait two hours for Donald. -> Donald kept................................ 3. It would not have been possible to solve that puzzle, even for a genius. -> That puzzle............................................ 4. "have you been out at all this evening, Mr...
Đọc tiếp

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it

1. How could I help, except to offer to lend her some money?

-> Other...........................

2. We had to wait two hours for Donald.

-> Donald kept................................

3. It would not have been possible to solve that puzzle, even for a genius.

-> That puzzle............................................

4. "have you been out at all this evening, Mr Johnston?" the detective asked.

-> The detective wanted to find out......................................................

5. Having nowhere else to go, I tried to sleep in the station waiting room.

-> As.................................................

6. I'd love to be in a secluded beach in Mexico.

-> I wish........................................

7. I only bought the dog because my children wanted a pet.

-> If...........................................................

8. I would love to live in Paris for a year.

-> If only......................................................

9. Does he know enough French to work as a translator?

-> Is his............................................

10. I can't go to the cinema tonight because I do not have my car.

->The reason I............................

1
29 tháng 6 2017

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it

1. How could I help, except to offer to lend her some money?

-> Other than to offer to lend her some money, how could I help ?

2. We had to wait two hours for Donald.

-> Donald kept us waiting for 2 hours

3. It would not have been possible to solve that puzzle, even for a genius.

-> That puzzle couldn't be solved, even for a genius.

4. "have you been out at all this evening, Mr Johnston?" the detective asked.

-> The detective wanted to find out if Mr.Johnson had been out at all that evening

5. Having nowhere else to go, I tried to sleep in the station waiting room.

-> As i didn't have nowhere else to go, I tried to sleep in the station waiting room.

6. I'd love to be in a secluded beach in Mexico.

-> I wish I were in a secluded beach in Mexico.

7. I only bought the dog because my children wanted a pet.

-> If my children hadn't wanted a pet, I wouldn't have bought the dog

8. I would love to live in Paris for a year.

-> If only I lived in Paris for a year

9. Does he know enough French to work as a translator?

-> Is his knowledge of French good enough to work as a translator?

10. I can't go to the cinema tonight because I do not have my car.

->The reason I can't go to the cinema tonight is that I do not have my car.

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it 1. She was just as good as they had thought. -> She quite definitely came............................. 2. The boy's work can surely be improved. -> The boy's work must .............................. 3. The outcome of the election was never in doubt. -> At no time............................................................ 4. Doris thought the woman in front of her was...
Đọc tiếp

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it

1. She was just as good as they had thought.

-> She quite definitely came.............................

2. The boy's work can surely be improved.

-> The boy's work must ..............................

3. The outcome of the election was never in doubt.

-> At no time............................................................

4. Doris thought the woman in front of her was her sister-in-law.

-> Doris mistook..............................................................

5. There was such a frightening atmosphere in that house that we had to leave immediately.

-> The atmosphere......................................................................

6. I tried as hard as I could, but I just couldn't get the money.

-> No matter.....................................................................

7. Someone í going to tune my piano tomorrow.

-> I'm...........................................

8. During the oil refinery strike, there were enormous petrol queues.

-> While..................................................................................

9. We'd better buy a new cokker.

-> It's........................................

10. The stereo was so powerful, I nearly went deaf.

-> It was..........................................

2
26 tháng 6 2017

Finish each of the following sentences in such a way that it means exactly the same as the sentences printed before it

1. She was just as good as they had thought.

-> She quite definitely came up to their expectation.

2. The boy's work can surely be improved.

-> The boy's work must be improvable

3. The outcome of the election was never in doubt.

-> At no time was the outcome of the election in doubt.

4. Doris thought the woman in front of her was her sister-in-law.

-> Doris mistook the woman in front of her was her sister-in-law.

5. There was such a frightening atmosphere in that house that we had to leave immediately.

-> The atmosphere in that house was so frightening that we had to leave immediately

6. I tried as hard as I could, but I just couldn't get the money.

-> No matter how hard I tried, I couldn't get the money

7. Someone í going to tune my piano tomorrow.

-> I'm going to ave my piano tuned by someone tomorrow.

8. During the oil refinery strike, there were enormous petrol queues.

-> While the oil refinery strike was going on, there were enormous petrol queues

9. We'd better buy a new cokker.

-> It's a good choice to buy a new cooker.

10. The stereo was so powerful, I nearly went deaf.

-> It was such a powerful stereo that I nearly went deaf.

26 tháng 6 2017

1. : She quite definitely came up to their expectation.

2.The boy's work must be CAPABLE OFimprovement

3, At no time was the outcome of the election in doubt

4. Doris mistook the woman in front of her for her sister-in-law

5, The atmosphere in that house was so frightening that we had to leave immediately

6, No matter how hard I tried, I couldn't get the money

7. . I'm going to have my piano tuned tomorrow.

8,While the oil refinery strike was going on, there were enormous petrol queues

9,it's time we bought a new cooker

10, it's was such a powerful stereo that i nearly went deaf.

16 tháng 6 2019

Complete the second sentence with the same meaning.

1. He said: We must have a party to celebrate this -> He said that ....THEY HAD TO HAVE A PARTY TO CELEBRATE THAT................

2. I'm on the tenth page of the letter I'm writing -> So far I ...............HAVE WRITTEN TEN PAGES OF THE LETTER...........

3. Minh last wrote to his pen pal five months ago. -> Minh hasn’t .....WRITTEN TO HIS PEN PAL FOR FIVE MONTHS.............

4. They usually wore jeans when they were young. -> They used.......TO WEAR JEANS WHEN THEY WERE YOUNG.........

5. We couldn’t go to school this morning because of the heavy rain. -> Because ...IT WAS RAINING HEAVILY,We couldn’t go to school this morning ............

6. Practice speaking everyday or you can't improve your English. -> If .....YOU DON'T Practice speaking everyday , you can't improve your English .....

7. Hard work is the secret of passing your exam. -> So long as.......YOU WORK HARD,YOU WILL PASS YOUR EXAM......................

8. You donot have to pay for elementary education in Viet Nam. -> Elementary education ..DOESN'T HAVE TO BE PAID FOR IN VN........

9. He was a fool to say that -> It is.......FOOLISH FOR HIM TO SAY THAT..................................

10. Living in the city is exciting -> Some people find IT IS EXCITED TO LIVE IN THE CITY

16 tháng 6 2019

câu 8 hình như sai đó bạn à

Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it : Exercise 2 1. People believe that UFOs are spacecraft from other planets => UFOs are ____________________ 2. Nam said to Lan ," If I were you, I would take the offer" => Nam advised__________________ 3. It rained heavily . However, I went to school on time . => Despite ________________________ 4. What a pity that I have to leave now => I wish...
Đọc tiếp

Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it :

Exercise 2

1. People believe that UFOs are spacecraft from other planets

=> UFOs are ____________________

2. Nam said to Lan ," If I were you, I would take the offer"

=> Nam advised__________________

3. It rained heavily . However, I went to school on time .

=> Despite ________________________

4. What a pity that I have to leave now

=> I wish __________________________

Exercise 3

1. Please do not smoke in this area of the restaurant

=> Customers are __________________

2. I have no advice , which I can offer you

=> I have no _______________________

3. Linda regretted not asking you for advice

=> Linda wished ___________________

4. " Would you like me to carry the luggage for you?" he said to her

=> He offered ______________________

Exercise 4

1. Why don't you use energy - saving bulbs ?

=> If __________________________

2. I was late for the flight

=> When I____________________

3. Lan's never had a more difficult question than this one

=> This _______________________

4. "I can't go to the movies with you tonight ,John." she said

=> She told ______________________

Exercise 5

1. You need to brush your teeth after meals

=> Your teeth need ________________

2. We've never heard such a great song

=> It's the _________________________

3. The little boy will go to sleep if you tell him a story

=> Unless______________________

4. Talking to those foreigners is very interesting

=> It's _________________________

Exercise 6

1. They no longer write to each other

=> They used _____________________

2. I can't get that job because I don't know English

=> If _______________________________

3. I think that no city in the world more beautiful than Paris

=> I think Paris ____________________

4. " Is your mother cooking in the kitchen now?" I said to Lan

=> I asked Lan _____________________

1
9 tháng 7 2020

Tự vẽ hình nha.

c. Ta có: \(\left\{{}\begin{matrix}\widehat{BFA}=\widehat{FIA}+\widehat{IAF}\\\widehat{FAB}=\widehat{MAB}+\widehat{FAM}\end{matrix}\right.\)

\(\widehat{FIA}=\widehat{MAB}\) (Cùng phụ \(\widehat{ABI}\) )

\(\widehat{IAF}=\widehat{FAM}\) (gt)

\(\Rightarrow\widehat{BFA}=\widehat{FAB}\) Hay \(\Delta ABF\) cân tại B.

\(BE\perp AF\) ( \(\widehat{AEB}=90^0\) )

Nên \(AE=EF\) (1)

Ta lại có: \(\left\{{}\begin{matrix}HK\perp AE\\\widehat{HAE}=\widehat{KAE}\end{matrix}\right.\) Suy ra \(\Delta AHK\) là tg cân.

\(\Rightarrow HE=EK\) (2)

Từ (1)(2)suy ra \(AHFK\) là hình bình hành.

\(\Rightarrow FK//IA\)

Hay \(AIFK\:\) là hình thang. Để AIFK nội tiếp được đường tròn thì \(\widehat{BIA}=\widehat{IAM}\) \(\Rightarrow\widehat{BIA}=\widehat{ABI}\) \(\Rightarrow\widehat{MBA}=\widehat{MAB}=45^0\)

Hay M là điểm chính giữa cung AB./.

Có gì không hiểu cứ hỏi mình nha. !

Exercise 4 :

2, When I slow, I will late for the flight.