Is his neck long or short?

It is . long. .

What about you ?

My neck is . .short.

Nếu gọi số cam buổi sáng là ab ( a > b ) thì buổi chiều là ba, ta có:

ab + ba = 143

a x 10 + b + b x 10 + a = 143

( a + b ) x 11 = 143 => a + b = 13

Vì ba cô buổi sáng bán được số cam khác nhau nên cô thứ nhất bán được 94 quả , cô thứ hai bán được 85 quả , cô thứ 3 bán được 76 quả, buổi chiều cô thứ nhất bán được 49 quả, cô thứ 2 bán được 58 quả, cô thứ 3 bán được 67 quả.

Các bạn li-ke cho mình nha!

TÌM LỖI SAI VÀ SỬA

1.He is good at speaking. He practices to English every day

=>bỏ

2. The river is the same long as that one

=>lenght

3. This is the most interesting film I have ever see

=>seen

4. The rooms looks beautifully when did you paint it?

=>look beautiful

5. Everyone have his own dreams about his future

=>has

6. I feel very pride to be a part of this football team

=>proud

7. They do morning exercise so as improve their health

=>so as to

8. Could you help me how solve this problem?

=>to solve

11. Jack isn't free today. He ...works........ (work)

12. According to the weather forecast, it .....will rain.....tomorrow(rain)

13. I'm sure Tom....to get......the job. He has a lot of experience. (get)

14. I ..will go....to a party tomorrow night. Would you like to come?(go)

15. I can't meet you tonight. A friend of mine...come.........to see me(come)

16. Don't worry about the dog. It ..hurts.........you.( hurt)

17. Tom .....plays.....tennis on Monday.( play)

18. Have you decided where to go for your holiday?
- Yes, we ......have gone.....to France.(go)

19. You must meet George sometimes. You .....like.......him. (like)

20. Don't ask Susan advice. She....knows......what to do.(know)

Bình nói đúng.

VD: 5²; -5²

      6²; -6²

        3²; -3²

Để chứng minh n(n+1)(n+2) chia hết cho 3 , hãy lần lượt xét các trường hợp n=3k ; n=3k+1 và n=3k+2 , chứng minh chia hết cho trong từng trường hợp đó.

Cho tam giác ABC nội tiếp (O;R)
kẻ đường kính AD và đường cao AH ta có:
góc ACD=AHB=90 độ
góc ADC = góc ABC (cùng chắn cung AC)
=> tam giác ACD ~ tam giác AHB (g.g)
=> AC.AB=2R.AH => AB.AC.BC/4R=AH.BC/2=S_ABC

II, Choose the best answer to complete these following sentences.

30. She isn’t used to _______ as a princess.

A. be treated B. being treated C. treating D. used to treat

31. Did you _______ to the circus when you were young.

A. used to go B. was used to go C. use to go D. was used to going

32. That foreigner is used to _______ in a tropical country.

A. live B. to living B. lived D. living

33. When being a boy, my uncle _______ fishing.

A. was used to going B. used to go C. used to going D. is used to going

34. Long ago there _______ a banyan tree here.

A. is used to being B. used to be C. used to being D. is used to be

35. We _______ to each other every month when we were at secondary school.

A. used to write B. usually wrote C. was used to writing D. A and B are right

36. I _______ a packet a day but I stopped two years ago.

A. used to smoke B. use to smoke C. used to smoking D. am used to smoking

37. Ben would travel a lot in his job but now, he doesn't.

A. used to B. use to C. was used to D. is used to

38. I_______ to work but now I take the bus.

A. use to drive B. used to drive C. was used to drive D. was used to driving

39. There _______ a cinema in the town but now there isn't.

A. use to be B. was used to C. is used to D. used to be

II, Choose the best answer to complete these following sentences.

20. He never drinks beer. He_________ drinking beer.

A. used B. isn’t used to C. used to D. isn’t used for

21. When I was at primary school. My mother _______ to school every day.

A. takes B. is taking B. used to take D. is used to taking

22. -“Do you play any sports, Ba?” -“Well I _______ play soccer when I was at high school.

A. am used to B. used to C. play D. am accustomed to

23. Mr. Ba is a doctor. He _______ working at night.

A. used to B. use to C. be used to D. is used to

24. Maryam used to walk past the mosque on her way to school.

A. Maryam usually walked past the mosque on her way to school.

B. Maryam was used to walking pass the mosque on her way to school.

C. Maryam walks pass the mosque on her way to school.

D Maryam is going to walk pass the mosque on her way to school.

25. She is used to _______ early.

A. get B. getting C. to get D. got

26. He didn’t use to _______ in the library.

A. work B. working C. to work D. worked

27. You will get used to _______ emails soon.

A. send B. to send C. sent D. sending

28. This knife is used ________ bread.

A. cut B. cutting C. to cut D. to cutting

29. Milk used_______ early in the morning.

A. to be delivering B. be delivered C. to be deliver D. to be delivered

II, Choose the best answer to complete these following sentences.

11. Tam didn’t _______ do morning exercise. Now he is getting fat.

A. used to B. use to C. get used to D. be used to

12. A lot of people use mobile phones nowadays. They _____communicating through long distances.

A. are used for B. used for C. used to D. are used to

13. It’s took me quite a long time to _________ wearing these glasses.

A. be used to B. used to C. get used to D. be used for

14. There was a big tree in our garden but it has just been cut down. There _______ a big tree there.

A. is used to B. has been C. is D. used to be

15. I _________ driving on the left in London here so I often travel by bus.

A. used to B. am used to C. am not used to D. didn’t use to

16. Mrs. Lan is a nurse, so she _________ at night.

A. to work B. is used to working C. worked D. used to work

17. He never drinks beer. He ___________ beer.

A. is used to drinking B. used to drink

C. didn’t used to drink D. isn’t used to drinking

18. I ________ stay up late watching TV last year but now I don’t.

A. be used to B. used to C. get used to D. be used for

19. My father__________ a packet of cigarettes last year but now he has given it up.

A. used to smoke B. used to smoking C. is used to smoking D. used to smoking