Cho 2022 điểm, trong đó không có 3 điểm nào thẳng hàng. Có bao nhiêu tam giác mà các đỉnh là 3 trong 2022 đỉnh đó?

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6. I haven't been to a concert for over a year.  The last time I was concert was over a year 47. The last time I really enjoyed myself was your birthday party.  I haven’t really enjoyed myself since your birthday party 48. It's nearly 20 years since my father saw his brother.  My father hasn’t seen his brother since nearly 20 years 49. When did you learn to drive?  How long is it since you learned to drive? 50. The last time I went swimming was when we were in Spain.  I haven’t I went swimming was since we were in spain 51. You haven't tidied this room for weeks.  It’s haven’t tided this room for weeks 52. We started looking for a flat 2 months ago and we are still looking.  We have looked for a flat 2 months and we are still looking 53. This is the first time I've been to a night club  I haven’t been to a night club before 54. They have never heard such a thing before.  This is the first time they heard such a thing 55. Noone has challenged his authority before.  This is the first time 56. She left university 2 years ago  It is university she left 2 years sgo 57. My mother was the most warm-hearted person I've ever known.  I have never know a more warm-hearter preson than my mother 58. I haven't been able to see them for over a year.  It is over a year I haven’t able to see them 59. It stared to rain at 2 o'clock.  It has start to rain at 2 o’clock 60. I have never been to the ballet before.  It is the fist time I been to the tablet 61. John and Mary moved to Edinburgh twenty years ago.  It is twenty years ago since John and Mary moved to Edinburgh 62. The police started looking for him two months ago.  For two months now the police looked for him 63. I have never seen a dirtier-looking dog.  This is a dirtiest dog I seen 64. Mary rang hours and hours ago.  It is hours for since she rang 65. It is ages since Alan visited his parents.  Alan visited his parents ages and ages 66. John has not had his hair cut for over six months.  It is 6months since he had his hair cut 67. I has never seen such a beautiful building.  It's the most beutyful building I ever seen 68. I have never read such a romantic story.  This is the most romantic story I ever read 69. They had never had such a cold winter.  It was the colder winter they ever had 70. You will never meet anyone more dangerous than Mrs Jones.  Mr. Jones is the most danerous person I ever meet 71. Man has never had such efficient servants as computer.  Computer is the most efficient servants as computer the man had 72. I haven't played football since 2000.  The last time I played football was 2000 73. I haven't been to HCM city for 2 years.  The last time I went to HCM city was 2 year 74. I 've never met such a famous person before.  It is the first time I saw a famous person 75. She hasn't seen that boy here before.  It is the first time she saw that boy 76. She hasn't written to us since last year.  The last time she wrote to us was last year 77. She started to learn E 8 years ago.  It’s 8 years since she learned english 78. He hasn't laughed so much for ages.  It’s he hasn’t laughted so much for ages 79. I haven't enjoyed myself so much for years.  It’s haven’t so much for year enjoyed myself 80. The telephone rang for hours.  It’s hours for since the telephone rang 81. I haven't seen him for ages.  It’s I haven’t seen him for ages 82. I have learned English for four years.  I started learing english four year ago 83. Ly’s father started to stop smoking last year.  Ly’s father starting to stop smoking last year 84. The editor hasn’t written to Mai for a month.  The editor last written to mai for a month 85. How long have you learned spanish?  How long ago it is since you learned spanish? The end check ho e may bai nay voi a sai thif suar laij zum e ak trc 7 h toi nha :3

Bài tập viết lại câu thì hiện tại hoàn thành và quá khứ đơn 1. Samuel started keeping a diary in 1997.  Samuel has keep a diary since 1997 2. We started leaming English fìve years ago.  We have learned English for five year 3. I began living in Ho Chi Minh City when I was 8.  I have lived in Ho Chi Minh city since I was 8 4. She has taught the children in this remote village for five months.  She started teaching the childrent in this remote village five months 5. He has written to me since April.  The last time he wrote to me was in April 6. She hasn’t had a swim for five years.  She last time she swam was in five years 7. They last talked to each other two months ago.  They haven’t talked to each other since two months 8. The last time she saw her elder sister was in 1999.  She hasn’t seen her elder sister since 1999 9. She hasn’t written to me for years.  It’s years she hasn’t wrote to me 10. Robert and Catherine have been married for ten ỵears.  It’s ten years Robert and Catherine had been married 11. It’s two weeks since they deaned their room.  They haven’t deaned their room for two week 12. It’s over six months since John had his hair cut.  John has his hair cut was in over six months 13. How long is it since you rode a bicyde?  When did you last ride a bicyde? 14. How long is it since he wrote to ỵou?  When did he last write to you? 15. When did he last talk to you?  How long is it since he talked to you? 16. When did you last telephone him?  Hong long is it since you telephone him? 17. We have never eaten this kind of food before.  It’s the first time we have eaten this kind 18. This is the fìrst time I have seen this film.  I have never seen this film before 19. This is the first time he went abroad.  He hasn’t went aboard before 20. She started driving 1 month ago.  She has drivent since 1 month ago 21. We began eating when it started to rain.  We have eatent since it started to rain 22. I last had my hair cut when I left her.  I haven’t hair cut since I left her 23. The last time she kissed me was 5 months ago.  She hasn’t kissed me for 5 month 24. It is a long time since we last met.  We haven’t met for a long time 25. When did you have it ?  How long it is you have it ? 26. This is the first time I had such a delicious meal .  I haven’t such a diliciuous meal before 27. I haven’t seen him for 8 days.  The last time i saw him was 8 days 28. I haven’t taken a bath since Monday.  It is I haven’t a bath since Monday 29. It's 2 years since I had a punture.  I have a punture since 2 years 30. It's 2 months since he earned any money.  He has earned many since 2 months 31. He last shaved the day before yesterday.  He hasn’t shaved since befor yesterday 32. I last drank champagne at my brother's wedding.  I haven’t drunk champage since brother’s wedding 33. It's 2 years since I was last in Rome.  I haven’t been Rome fore 2 year 34. I saw Tom last on his wedding day.  I haven’t seen tom since his wedding day 35. I last ate raw fish when I was in Japan.  I haven’t eaten raw fish since I been in japan 36. It's years since Mary last spoke French.  Mary hasn’t spoken french since years 37. It's ten weeks since since I last had a good night sleep.  I haven’t had a good night sleep since ten weeks 38. He last paid taxes in 1970.  He hasn’t paid taxes since 1970 39. I last ate meat 5 years ago.  I haven’t aeten meat for 5 years 40. It's 3 months since since the windows were cleaned.  The windows haven’t cleaned since 3 months 41. It's years since I took photographs.  I haven’t tooken photographt since years 42. I last watched TV on new years's day.  I haven’t watched TV since new year’s day  It's 3 months since he wrote to me.  He hasn’t wroten to me since 3 months 43. The last time I was aboard was in the summer of 1978.  I haven’t been aboard since in the summer of 1978 44. It's ten years since that house was lived in.  That house was lived in since ten years 45. I haven't seen him for 2 months.  I last saw him was 2 months check cho em tat ca cac bai tren voi a trc 7 h toi nhe sai thi sua lai o phan tra loi ho e aj