`a)2.(x^2+1/2 y)(2x^2-y)` `b)x^3+3x^2+3x+1x` `c)(x+3)^2` `d)(x-1)^2`

Khong spam nkee :< Lam ho tuii vs >< 21. He has been fishing................six o'clock. 22. They've been living in France ................eight years. 23. The pilots have been on strike................two months. 24. We've had terrible weather................Saturday. 25. I've known Tom................1990. 26. We have been waiting for the bus................half an hour. 27. She hasn't lost a match................April. 28. Things have changed................she's become headmaster. 29. The police have been looking for him................a month. 30. Our dog has been ill................two days. 31. I've been looking for this book................a long time. 32. I've been working................I got up. 33. The kettle has been boiling................ten minutes 34. They have been living in Madrid .................1972. 41. I haven't seen him for three years. It is because I haven't been there..............I left school. 42. I have been trying to mend this old fashioned car.................. hours. 43. One of my friends has been teaching in Tokyo................. three years. I haven't met him since last year. 44. I haven't enjoyed myself................two weeks since I heard that my final exam grades were low. 45. I know that you have never seen a lion.......... you were born. Then now I say that we can go to the zoo and see one. 46. The police have been looking for him for two weeks........... he escaped from the prison.

trình bày suy nghĩ về quan điểm:dù ốm ko muốn ăn nhưng hãy nhớ đến công ng nấu cháo

So sách chính sách kinh tế - xã hội của triều đại Quang Trung và nhà Nguyễn Nhanh ạ,chính xác 16h30 mk nộp rồi,ai nhanh nhất=ctlhn

helppppppppppppppp! helppppppppppppppp!

em đã từng tham gia nhiều trò chơi hãy tả lại 1 cảnh đi chơi của em và các bạn

Viết một bài văn từ 8 đến 11 câu nêu cảm nhận của em về nét đặc sắc của ca Huế

giúp với các mod xinh gái đẹp trai ới

II. Read the passage, and then choose the best answers. Each country has many good people who take care of others. For example, someof students in the United States often spend many hours as volunteers in hospitals, orphanages or homes for the elderly. They read books to the people in these places, or they just visit them and play games with them or listen to their problems. Other young volunteers go and work in the homes of people who are sick or old. They paint, clean up, or repair their houses, do the shopping. For boys who don’t have fathers, there is an organization called Big Brothers. College students and other men take these boys to basketball games or on fishing trips and help them to get to know things those boys usually learn from their fathers. Each city has a number of clubs where boys and girls can go and play games. Some of these clubs show movies or hold short trip to the mountains, the beaches, museums, or other places of interest. Most of these clubs use a lot of students as volunteers because they are young enough to understand the problems of younger boys and girls. 1. What do volunteers usually do to help those who are sick or old in their homes? A. They do the shopping, and repair or clean up their house. B. They tell them stories and sing dance for them. C. They cool, sew, and wash their clothes. D. They take them to basketball games. 2. What do they help boys whose fathers do not live with them? A. To learn things about their fathers. B. To get to know thing about their fathers. C. To get to know things that boys want from their fathers. D. To learn things that boys usually learn from their fathers. 3 .Which activities are NOT available for the students at the clubs? A. playing games B. learning photography C. going to interest places D. watching films 4. Why do they use many students as volunteers? – Because . A. they can understand the problems of younger boys and girls. B. they have a lot of free time. C. they know how to do the work. D. they are good at playing games and learning new things. 5. Where don’t students often do volunteer work? A. hospitals B. orphanages C. clubs D.homes for the elderly

Giải giúp mình với ạ, mình cảm ơn !