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Pham Trong Bach
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Cao Minh Tâm
27 tháng 10 2019 lúc 2:42

+ A ∩ A = A          + A ∪ A = A

+ A ∩ ∅ = ∅          + A ∪ ∅ = A

+ CAA = A \ A = ∅          + CA∅ = A \ ∅ = A.

yohan
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Minh Hiếu
22 tháng 9 2023 lúc 21:04

-4 -2 5 m

Để \(A\cap B\ne\varnothing\Leftrightarrow m\ge-2\)

Nguyễn Thùy CHi
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Đỗ Thanh Hải
26 tháng 5 2021 lúc 10:49

31. He went to _______ United States to learn _______ computer science.

      A. Ø / Ø                           B. an / the                     C. the / Ø                      D. the a

32. He has _______ good knowledge of computers.

      A. a                                  B. an                             C. the                            D. Ø

33. It was _______ excellent meal. It was better than  _______  one which we had last night.

      A. an / the                        B. a / an                        C. the / an                       D. an / an

34. He is opening his mouth _______

      A. very wide                    B. to be very wide        C. being very wide       D. so very wide

35. Lightning flashed brightly _______

      A. as in the sky                                                      B. when in the night sky

      C. it is in the sky                                                    D. in the night sky

36. _______ is before a water shortage.

      A. Being the best time to practice water conservation

      B. When the best time to practice water conservation

      C. The best time practice water conservation

      D. The best time to practice water conservation

37. The children went _______

      A. yesterday afternoon to a film                           B. to a film yesterday afternoon

      C. to a film afternoon yesterday                           D. afternoon yesterday to a film

38. The infection was probably caused _______

      A. in contaminated water by swimming

      B. by swimming in contaminated water

      C. in water contaminated by swimming

      D. by swimming in water contaminated

39. I will buy _______ when I get the salary.

      A. a new English dictionary                                  B. an English new dictionary

      C. a new dictionary English                                  D. an English dictionary new

Khánh Quốc
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Nguyễn Minh Anh
22 tháng 11 2021 lúc 11:28

1. the

2. the

 

Nguyễn Minh Anh
22 tháng 11 2021 lúc 11:32

3. the/a

4. the/a

5. 0/0

Trung Hiếu Nguyễn
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Hoàng Hạnh Nguyễn
25 tháng 8 2021 lúc 11:11

1. He asked Mai to prepare for the text the next day.

2. Tom told me not to forget to bring him a cake.

3. He asked her to open her books.

4. He told her to show him her tickets.

5. I asked him to phone him that night.

Nguyễn Thùy CHi
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Đỗ Thanh Hải
30 tháng 5 2021 lúc 9:31

31. When I was at _______ Cambridge University, I study _______ Physics.

      A. Ø / Ø                           B. the / the                    C. the / a                       D. Ø / the

32. At _______ beginning of the twentieth century, Los Angeles became _______ popular immigrant destination.

      A. the / a                          B. Ø / the                      C. Ø / Ø                        D. an / the

33. _______ amazing thing happened to me yesterday. _______ man mistook me for his girlfriend.

      A. The / An                      B. An / A                      C. A / The                     D. The / Ø

34. _______ were rescued by the firemen.

      A. As the earthquake’s last three men

      B. The earthquake with the last three victims

      C. Being the last three victims of the earthquake

      D. The last three victims of the earthquake

35. _______, he could not go to school on that day.

      A. Ill                                 B. To be ill                   C. As being ill              D. Being ill

36. _______, she ran into the room.

      A. Frighten, hear the news                                    B. Hearing a noise, after frightened

      C. She frightened, hearing a noise                        D. Frightened, after hearing a noise

37. The government is very worried about the increase of _______.

      A. the youth unemployment rate                           B. the unemployment youth rate

      C. the rate youth unemployment                          D. the youth rate unemployment

38. Chopin, _______, died at Place Vendome.

      A. a composer worldwide famous                        B. a composer famous worldwide

      C. a worldwide famous composer                        D. a famous worldwide composer

39. He _______ all that on his own.

      A. possibly cannot have drunk                              B. cannot have possibly drunk

      C. cannot possibly have drunk                              D. cannot have drunk possibly

40. My favorite place to be    midnight on Halloween is _______ home with a scary movie _______ TV.

      A. in / in / from                B. at / at / on                 C. for / on / in               D. on / over / at

41. We have seen many increases _______ production levels.

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

42. Peter likes taking photographs _______ the mountains.

      A. through                        B. of                              C. from                         D. upon

43. The burglars _______ before the police arrived.

      A. made off                      B. took out                    C. went through            D. ran in

44. She was _______ as a laboratory assistant.

      A. taken on                      B. kept away                 C. hung over                 D. put off

45. The alarm will _______ automatically as soon as smoke is detected.

      A. knock down                 B. get on                       C. turn over                  D. go off

46. The volunteers planted these trees in the park last week.

      A. These trees were planted by the volunteers in the park last week.

      B. These trees were planted in the park by the volunteers last week.

      C. These trees were planted in the park last week by the volunteers.

      D. The park was planted these trees by the volunteers last week.

47. Bowling _______ by the Dutch who colonized the New World in the 1600’s.

      A. has been introduced                                          B. was introduced

      C. had been introduced                                         D. introduced

48. The reason why the millionaire committed suicide _______ so far.

      A. had not be known                                              B. had not known

      C. has not known                                                   D. has not been known

49. _______ anything stranger.

      A. Has he seldom seen                                          B. Has he seen seldom

      C. Seldom has he seen                                           D. Seldom he has seen

50. No sooner _______ dinner than _______ for a walk.

      A. she had finished / she went                               B. she had finished / did she go

      C. had she finished / she went                               D. had she finished / did she go

51. _______ the problem.

      A. Did I understand only then                               B. I understood only then

      C. Only then did I understand                               D. Only then I understood

52. “_______,” the mother warned her sons.

      A. Boys, don’t go near the lake                             B. Boys, you will not go near the lake

      C. Boys, let’s go near the lake                              D. Boys, you would like to go near the lake

53. John _______ him my phone number.

      A. invited me to give                                             B. suggested me giving

      C. said to me to give                                              D. told me to give

54. They have ever advised _______ the hotel for reservation.

      A. me to phone and writing                                   B. to phone and write me

      C. me both phoning and writing                           D. me either to phone or to write

55. Frequent practice _______ you to get _______ in learning a language.

      A. enables / achievement                                       B. able / achieve

      C. abilities / achieving                                          D. disabilities / achievable

56. John did not want to be so _______, but he could not help it.

      A. fright                           B. frighten                    C. frightened                D. frightening

57. Her doctor advised her to do jogging because she is _______

      A. weighed                       B. weightless                C. weightlessness         D. overweight

58. He told me _______ at the scene of the accident.

      A. what had he seen                                               B. what he had seen

      C. that what he had seen                                        D. whether what had he seen

59. Is it true _______?

      A. that will all movies be available online

      B. that all movies will be available online

      C. if all movies will be available online

      D. if will all movies be available online

60. _______ is none of your business.

      A. What we are doing                                            B. What are we doing

      C. We are doing what                                            D. That what we are doing

Komorebi
30 tháng 5 2021 lúc 9:37

undefined

 

Nguyễn Minh Hiệp
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Lê Ngọc Trang
20 tháng 3 2020 lúc 19:51

A∩B= Ø

A∩P={ 2 }

A⊂N

                                                              học                                                         tốt                                                                                     

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Nguyễn Minh Hiệp
20 tháng 3 2020 lúc 20:53

Thank you bạn nha ;)

Khách vãng lai đã xóa
Đức Anh Ramsay
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Lê Trang
28 tháng 1 2021 lúc 19:53

   1.        Chọn đáp án đúng        

          1.1.        ……….. Statue of Liberty was a gift of friendship from ……….. France to ……….. United States.

A.the/ ø/ the       B.the/the/the        C.  ø/the/the           D. ø/ ø/ the

 

          1.2.         I am studying ……….. English and ………. .Math this term.

A.ø/the               B.the/the               C. the/ ø                D.  ø/ ø

 

          1.3.        There is ……….. umbrella in ……….. corner of the house.

A.a/a                  B. a/  ø                    C.an/the                D. an/  ø

          1.4.        Normally, it takes us ………. .hour and ……….. half to go there

A.a/a                   B. an/a                      C. a/an                 D. a/ ø

          1.5.        Please give me ……….. cup of ……….. coffee with cream and less sugar.

A.a/a                     B.a/the                    C. the/ ø                  D. a/ ø

nguyễn nam anh
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