I. Give the correct form of the word given to complete the sentences.

Biến là một ký hiệu,là chữ cái đại diện cho một giá trị chưa biết hoặc có thể thay đổi.

VD:

Có phương trình y = 5x+6

Thì x và y là các biến.

1. I usually play football when I have____.

        A. spare time        B. good time                C. no time               D. times

2. In team sports, the two teams_____ against each other in order to get the better score.

        A. are                   B. do                            C. make                  D. compete

3. ___draw on the walls and tables, please .

        A. Do                   B. Don't                       C. Should                D. Shouldn't

4. Nam plays sports very often, so he looks very___.

        A. sport                B. sports                      C. sporty                 D. sporting

5. Last summer, I_____ fishing with my uncle in the afternoon.

        A. go                    B. went                        C. goes                    D. going

6. I like watching football matches, but I am not very good____ playing football.

        A. at                     B. in                             C. on                       D. for

7. Team sports are sometimes called_____ sports.

        A. compete           B. competition             C. competitor          D. competitive

8. "   ___do you do judo?" - "Twice a week.".

        A. When               B. Where                     C. How often           D. Why

9.      ___sports do you like watching on TV?  .

        A. How                 B. What                       C. Do                      D. How often

10. Football is regarded ____the most popular sport in the world.

        A. for                    B. as                            C. like                     D. of

11. Sports and games___ an important part in our lives.

        A. play                 B. do                            C. go                       D. make

12. When you go to the zoo, don't                      the animals.

        A. play                 B. do                            C. tease                   D. watch

13. Playing sports helps us get____                    .

        A.fat                     B. free                          C. fittest                  D. fitter

14. Nam's dream is to become a                         .

        A. loser                 B. champion                C. contest                D. gamer

15. "I'd like to watch motor racing because it is very                          ______."

        A. frightening       B. exciting                   C. excited                D. boring

16. My sister often        badminton in her free time.

        A. play                 B. plays                       C. playing               D. to play

17. Marathon is considered a/an_____ sport.

        A. team                 B. individual                C. indoor                D. sporting

18. Our school football team_______ the match with Tran Phu School last Sunday.

        A.wins                  B.won                          C. scores                 D. scored

19. Tam                         three goals for our team and made it a hat trick.

        A. scores              B. scored                     C. plays                  D. played

20. Blackburn Rover is at the bottom of the league. They______ most of their matches this season.

        A. played              B.won                          C. lost                     D. scored

21. My friend Mark is very good ________ volleyball. He plays volleyball very well.

     A. in                         B. on                            C. at                         D. with

22. We often go swimming ________ Sunday morning.

     A. in                         B. on                            C. at                         D. for

23. Football is an example of a ________ sport where you play with several other people.

     A. team                    B. individual                C. indoor                  D. dangerous

24. We were very upset when our favourite team didn’t ________ even one goal.

     A. play                     B. kick                         C. point                    D. score

25. Badminton requires only a net, a racket, and a birdie or ________.

     A. ball                      B. ski                           C. shuttlecock          D. goggles

26. The person who makes sure that a game is played according to the rules is called a ________.    

     A. coach                   B. Climbing                 C. Not to climb                   D. Don’t climb

27. ________ spectator sports in Britain are cricket and football.

     A. More popular       B. The more popular        C. Most popular         D. The most popular

28. ________ are the Olympic Games held? - Every four years.

     A. When                   B. Where                     C. How long             D. How often

29. Which sport happens in a ring?

     A. Boxing                B. Basketball               C. Aerobics        D. Swimming

30. I _______ born on the first of May.

     A. were                    B. was                         C. are                 D. is

31. The enemy ._______ by night.

     A. attack                  B. attacks                     C. attacked         D. did attack

32. Mind about what I just _______now.

     A. said                     B. say                          C. did say           D. didn’t say

33. Did you ever ._______of such a thing?

     A. hear                     B. hears                       C. heard             D. heart

34. He ________some eggs to make cakes.

     A. buys                    B. buy                          C. buied             D. bought

35. There .________ any eggs in the packet when I______ the kitchen.

     A. was/ come            B. were/ come              C. was/ came      D. were/ came

36. I ________ a English course to improve all the skills.

     A. not joined            B. joined                      C. did joined       D. join

37. We _______. to our friend last night.

     A. spoke                   B. speak                       C. speaked         D. spoken

38. We ________ and__________ lunch at the cafeteria with them.

     A. talked/have          B. talked/ had               C. talk/had         D. talked/ have

39. __________. you attend yoga class when I___________ at home?

     A. Did/ stayed                                              B. Didn’t/ didn’t stayed

     C. Did/ didn’t stayed                                    D. Did/ stayed

40. I __________. his car to work while he was sleeping.

     A. drive                    B. drove                       C. driving           D. driven

41. The man ..________________. the door and .____________. pieces of paper.

     A. open/ thrown                                           B. opened/ threw

     C. opened/ thrown                                      D. open/ throw

42. He ______ them into a room.

     A. led                    B. lead                  C. leaded              D. leads

43. He .___________off his hat and________ into the room.

     A. take/went         B. take/go             C. taken/go           D. took/ went

44. The meeting .___________5 minutes ago.

     A. finished            B. finish                C. did not finish    D. did finish

45. When _______ she _____________ the report?

     A. do/ finish          B. did/ finished     C. did/finish D. didn’t/ finished

46. I ___________. my close friend a cushion for her chair yesterday.

     A. gave                 B. give                  C. gived                D. given

47. Hoa’s neighbor .___________. her and then ___________. it very well.

     A. helped/ fits       B. helped/ fit         C. help/ fitted        D. helped/ fitted

48. I ._____________ what teacher .__________ in the last lesson.

     A. didn’t understand/ said                  B. didn’t understood/ said

     C. understand/ say                             D. understood/ say

49. Yesterday, I ___________ to a souvenir shop near the exit of the aquarium.

     A. go                    B. gone                 C. went                 D. goes

50. _______ much do you weigh?

     A. Which              B. Who                 C. What                D. How

th a=), e đọc lại đề cô bảo thêm lý do, có sửa nhưng ko được=')), kiủ v

\(x_1+\dfrac{1}{x_1}+x_2+\dfrac{1}{x_2}\)

\(\left(x_1+x_2\right)+\left(\dfrac{1}{x_1}+\dfrac{1}{x_2}\right)\)

\(\left(x_1+x_2\right)+\dfrac{x_2+x_1}{x_1.x_2}\)

\(\left(x_1+x_2\right)+\dfrac{\left(x_1+x_2\right)}{x_1x_2}\)

B. Tuổi thọ cao

1.D->were

2.C->as

3.

4.C->implemented

5.B-> are preserved

6.A-> bỏ more

7.D->preserving

8.C-> unless