71. You will never meet anyone more dangerous than Mrs. Jones. → Mr. Jones is the most ………………………………………………… 72. Man has never had such efficient servants as computer. → Computer is the most ………………………………………………… 73. I haven't played football since 2000. → The last time ………………………………………………… 74. I haven't been to HCM city for 2 years. → The last time………………………………………………… 75. I 've never met such a famous person before. → It is the first time………………………………………………… 76. She hasn't seen that boy here before. → It is the first ………………………………………………… 77. She hasn't written to us since last year. → The last time ………………………………………………… 78. She started to learn E 8 years ago. → It’s………………………………………………… 79. He hasn't laughed so much for ages. → It’s ………………………………………………… 80. I haven't enjoyed myself so much for years. → It’s…………………………………………………

Các câu hỏi liên quan

1. Samuel started keeping a diary in 1997. → Samuel has ………………………………………………… 2. We started learning English five years ago. → We have ………………………………………………… 3. I began living in Ho Chi Minh City when I was 8. → I have ………………………………………………… 4. She has taught the children in this remote village for five months. → She started………………………………………………… 5. He has written to me since April. → The last time………………………………………………… 6. She hasn’t had a swim for five years. → She last ………………………………………………… 7. They last talked to each other two months ago. → They haven’t………………………………………………… 8. The last time she saw her elder sister was in 1999. → She hasn’t ………………………………………………… 9. She hasn’t written to me for years. → It’s years………………………………………………… 10. Robert and Catherine have been married for ten ỵears. → It’s ten years ………………………………………………… 11. It’s two weeks since they cleaned their room. → They………………………………………………… 12. It’s over six months since John had his hair cut. → John ………………………………………………… 13. How long is it since you rode a bicycle? → When ………………………………………………… 14. How long is it since he wrote to you? → When………………………………………………… 15. When did he last talk to you? → How long ………………………………………………… 16. When did you last telephone him? → Hong long ………………………………………………… 17. We have never eaten this kind of food before. → It’s the ………………………………………………… 18. This is the first time I have seen this film. → I have never………………………………………………… 19. This is the first time he went abroad. → He hasn’t ………………………………………………… 20. She started driving 1 month ago. → She has ………………………………………………… 21. We began eating when it started to rain. → We have ………………………………………………… 22. I last had my hair cut when I left her. → I haven’t ………………………………………………… 23. The last time she kissed me was 5 months ago. → She hasn’t………………………………………………… 24. It is a long time since we last met. → We haven’t………………………………………………… 25. When did you have it ? → How long………………………………………………… 26. This is the first time I had such a delicious meal . → I haven’t………………………………………………… 27. I haven’t seen him for 8 days. → The last………………………………………………… 28. I haven’t taken a bath since Monday. → It is………………………………………………… 29. It's 2 years since I had a future. → I have ………………………………………………… 30. It's 2 months since he earned any money. → He has ………………………………………………… 31. He last shaved the day before yesterday. → He hasn’t ………………………………………………… 32. I last drank champagne at my brother's wedding. → I haven’t ………………………………………………… 33. It's 2 years since I was last in Rome. → I haven’t………………………………………………… 34. I saw Tom last on his wedding day. 35. I last ate raw fish when I was in Japan. → I haven’t ………………………………………………… 36. It's years since Mary last spoke French. → Mary hasn’t………………………………………………… 37. It's ten weeks since since I last had a good night sleep. → I haven’t………………………………………………… 38. He last paid taxes in 1970. → He hasn’t………………………………………………… 39. I last ate meat 5 years ago. → I haven’t………………………………………………… 40. It's 3 months since since the windows were cleaned. → The windows haven’t ………………………………………………… 41. It's years since I took photographs. → I haven’t ………………………………………………… 42. I last watched TV on new year's day. → I haven’t ………………………………………………… 43. It's 3 months since he wrote to me. → He hasn’t ………………………………………………… 44. The last time I was aboard was in the summer of 1978. → I haven’t ………………………………………………… 45. It's ten years since that house was lived in. → That house ………………………………………………… 46. I haven't seen him for 2 months. → I last ………………………………………………… 47. I haven't been to a concert for over a year. → The last time ………………………………………………… 48. The last time I really enjoyed myself was your birthday party. → I haven’t ………………………………………………… 49. It;s nearly 20 years since my father saw his brother. → My father hasn’t…………………………………………………

Câu 1: Với a = 4; b = -5 thì tích a2b bằng: A. 80 B. –80 C. 11 D. 100 Câu 2: Cách tính đúng là: A. 22 . 23 = 25 B. 22 . 23 = 26 C. 22 . 23 = 46 D. 22 . 23 = 45 Câu 3: Cách tính đúng: A. 43 . 44 = 412 B. 43 . 44 = 1612 C. 43 . 44 = 47 D. 43 . 44 = 87 Câu 4: Xét trên tập hợp N, trong các số sau, bội của 14 là: A. 48 B. 28 C. 36 D. 7 Câu 5: Xét trên tập hợp N, trong các số sau, ước của 14 là: A. 28 C. 14 B. Cả 3 câu A, C và D đều sai D. 4 Câu 6: Tâp hợp nào chỉ gồm các số nguyên tố: A. B. C. D. Câu 7: Trong những cách viết sau, cách nào được gọi là phân tích 20 ra thừa số nguyên tố: A. 20 = 4 . 5 B. 20 = 2 . 10 C. 20 = 22 . 5 D. 20 = 40 : 2 Câu 8: Phân tích 24 ra thừa số nguyên tố – Cách dùng đúng là: A. 24 = 4 . 6 = 22 . 6 B. 24 = 23 . 3 C. 24 = 24 . 1 D. 24 = 2 x 12 Câu 9: ƯCLN (18; 60) là: A. 36 B. 6 C. 12 D. 30 Câu 10: BCNN (10; 14; 16) là: A. 24 . 5 . 7 B. 2 . 5 . 7 C. 24 D. 5 . 7 Câu 11: Cho biết 36 = 22 . 32; 60 = 22 . 3 . 5; 72 = 23 . 32. Ta có ƯCLN (36; 60; 72) là: A. 23 . 32 B. 22 . 3 C. 23 . 3 . 5 D. 23 . 5 Câu 12: Cho biết 42 = 2 . 3 . 7; 70 = 5 . 2 . 7; 180 = 22 . 32 . 5. BCNN (42; 70; 180) là: A. 22 . 32 . 7 B. 22 . 32 . 5 C. 22 . 32 . 5 . 7 D. 2 . 3 . 5 . 7 Câu 13: Tất cả những số nguyên n thích hợp để (n + 4) là ước của 5 là: A. –3; 6 B. –3; -9 C. +1; -3; -9; 3 D. +1; -3; -9; -5 Câu 14: Kết quả đúng của phép tính 3 – (2 + 3) là: A. –2 B. 4 C. 8 D. 2 Câu 15: Kết quả đúng của phép tính 3 – ( 2 – 3) là: A. 8 B. 4 C. -2 D. 2