Điền "since" hoặc "for" : 1. I have live in London.........six months. 2. I have danced........I was small. 3. She hasn't had a day off..........three months. 4.I've lost so much flexibility...........I injured my leg. 5. They have all improved in attitude........the headmaster talked to them. 6. Was have been happening........centuries, it won't ever change. 7. I haven't been on holiday.......ages. 8. I haven't eaten that much........Chiristmas. 9. I haven't been on holiday.......last year. 10. She hasn't seen her jacket......yesterday, I think she lost it. 11. I have been a teacher...............30 years. 12. Bob has worked in that import-export company...................he was 20. 13. I have studied English...........four years. 14. Jenny has eaten five hamburger............7pm. 15. My parent have been married............twenty years. 16. I have known my best friend.........I met him at high school. 17. They have traveled in the USA...........one month 18. The boys have played tennis...........two hours. 19. Kevin has been in Greece...........July. 20. My brother has drunk beer............two hours

Mong mn giúp mình Ưu tiên BĐHH ạ

Phân tích đa thức thành nhân tử 1 - 8x^3

Mn giải giùm e câu này vs ạ e chx hình dung đc cách giải

Phân tích đa thức thành nhân tử 4x^2 - 25y^2

phân tích đa thức thành nhân tử. x^4 - 2x^3 + 2x -1

bằng phương pháp hóa học hãy nhận biết các dung dịch sau $(NH_{4})_{2}CO_{3}, (NH_{4})_{2}SO_{4}, NaCl, NH_{4}Cl, NaNO_{3}$

Finish the second sentence so that it has a similar meaning to the first one, using the word in brackets or beginning with the given words. 41. My father was an actor many years ago, but now he is a director. (USED) =>........................................................................................... 42. They were shocked at the ending of the film. (SHOCKING) =>........................................................................................... 43. Although Carnival is a popular festival in many countries in South America, I have never attended it. (NEVERTHELESS) =>........................................................................................... 44. They built a hydro power station in the North of the country last year. => A hydro power station..................................................... . 45. We will solve the problem of energy shortage by using solar energy next decade. => The problem of energy shortage....................................... .

Phân tích đa thức thành nhân tử x^2 - 10x - 25

Tính giá trị biểu thức bằng cách vận dụng hằng đẳng thức B=x^3 - 3x^2 + 3x với x= 11