bài 1: tính 

a) 3/4+(-5/2)+(-3/5)

b) \(\sqrt{\left(7\right)^2}+\sqrt{\dfrac{25}{16}-\dfrac{3}{2}}\)

c)\(\dfrac{1}{2}.\sqrt{100}-\sqrt{\dfrac{1}{16}+\left(\dfrac{1}{3}\right)^0}\)

IV.  Fill in each blank with just' already or yet.

56. I haven’t had lunch                                   .

57. I’ve                        had my exam results.

58. My father has                                returned from his trip to Australia.

59. I have                                had three tests this week.

60. Have you played your new computer game                                 ?

III. Fill in each blank with the correct linking word.

51. Paul likes to help the sick                         he has donated blood several times.

52. Take a coat                                   it’s cold outside.

53. Homeless children are                               they don’t have enough food, warm clothes and schooling.

54. Nick went to bed early                               he felt very tired.

55. We went to the nursing home                               we talked and sang for the elderly.

II.  Put the verbs in brackets in the correct verb tense: the Present Perfect or Past Simple.

41. Someone (turn)                             on the hi-fi. Do you know that song?

42. The match (just start)                               . Our team is playing very well.

43. My mother (do)                            all the cleaning. The apartment is really clean now.

44. He (lose)                           his credit card. He can’t find it anywhere.

45. Prices (go)                        up. Everything is more expensive nowadays.

46. (you/buy)                          the laptop yet.

47. I (have)                             this iPad for three years3. My father (give)                                       it to me when I was in grade 6.

48. I (watch)                           the film Titanic already.

49. Miss White (work)                                   in HaNoifrom 2011 and 2014.

50. I (be)                                 to Sa Pa twice since 2000.

I.Fill in each blank with ONE suitable word.

1.   Community service is the work you do for the                                        of the community.

2.   Our club offers                             for free meals for the sick in this hospital.

3.   College students can take part in our programme by                                poor or homeless children in Ha Noi.

4.   The activities of our organization include recycling things and teaching others                               to do so.

5.   Americans do volunteer work not                        they are forced or paid to do it.

6.   I have                                a lot of old books for village children.

7.   Start your own                              project to make your school a better place.

8.   Be a Buddy has                              evening classes for street children in our city.

9.   Last month our organization started a community garden                                    toprotect the environment.

10. The members of the club                                      blankets for poor children who live inmountainous areas last year.