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vuquyen27
2 năm trước
Bài 5: Rút gọn rồi tính giá trị của biểu thức $A=$ $4$$x^{2}$($x$-$y^{2}$)$+2y$($x^{2}$$y-x$)-4$x^{3}$ $tại$ $x=-2; y=-3$ $B=$ $4$$y^{2}$($x^{2}$$-xy$+$3x$$y^{2}$)$-xy$($4xy$-$4$$y^{2}$) $tại$ $x=11; y=-1$
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AI GIÚP ĐANG GẤP Ạ I.Read the passage. Circle A, B or C to answer each question: The Tay live mainly in the Northeastern part of Viet Nam. They live in large and crowded villages with hundreds of houses. They live in houses built on stilts. They are mainly farmers and they grow rice on terraced fields. They also raise cattles and poultry. Tay traditional dress is made from homegrown cotton. There is usually not much embroidery or other decorations. Women wear skirts or trousers, with short shirts inside and long one on the outside. They have many festivals and holidays in a year. The Lunar New Year and the mid-July festivals are the most lavishly organized. During festivals, people in many places play con throwing, badminton, tug-of-war, dragon dancing, or chess. The Tay eat mainly sticky rice. On festival occasions, they make many kinds of cakes, such as banh chung (sticky rice square cakes), banh day (sticky rice round cakes) or banh khao (cakes made of white rice flour). 1. Which of the following best describes the main idea of the passage? A. The Tay live in the Northeastern part of Viet Nam. B. The Tay make many kinds of cakes on festival occasions. C. The Tay have many festivals and holidays in a year. D. The life of the Tay in Viet Nam. 2. What do the Tay mainly eat? A. sticky rice B. sticky rice round cakes C. sticky rice square cakes D. cakes made of white rice flour 3. Which of the following is NOT true of the Tay? A. They live on stilt houses. B. They grow rice on terraced fields. C. They wear clothes with much embroidery. D. They eat sticky rice. 4. Which is true of the Tay’s life? A. They mainly work in agriculture. B. They work in industry. C. They have one very important festival a year. D. They buy cotton to make dress. GIÚP MÌNH NHANH VỚI Ạ

1. I (have not seen/ not see/ don't see/ didn't see) Hoa since 2006. 2. I (teach/ have taught/ taught) English in that school since 1998. 3. Look! The car (came/ is coming/coming/come) 4. They (don't finish/ haven't finished/ didn't finish) their work yet. 5. My mother always(get/got/ gets/ getting)up early in the morning. 6. We(lived/ have lived/ live) in this village since 2000. 7. My friends (don't visit/ didn't visit/ wasn't visit)me yesterday 8. My father often (drink/ drinks/ drinking)tea in the morning. 9. How long (do you live/ have you lived/ did you live) in Vietnam, Maryam? - Forthree months. 10. When I came, Hoa (is cooking/ was cooking/cooked) dinner. 11. We (have not made/ don't make/ didn't make) our decision yet. 12. I (have ever seen/ ever see/ ever seen) that film 13. They (have never eaten/ never eaten/ ever eaten) durians. 14. We (learn/learned/ were learning) English at this time yesterday. 15. Hoa (is going visit/ going to visit/ is going to visit) me next week. 16. Is Black Pool (visiting/visited/ visit) by thousands of tourists each year? 17. A new bridge (is building/is going to build/ is going to be built) in this area next year. 18. Kangaroo (can be seen/ can see/ can be see) everywhere in Australia. 19. Jeans(sell/ are sold/ is sold) all over the world. 20. Trees (are planting/ are planted/ are being planted) now. 21. When the teacher came, an English song (is sung/ is being sung/ was being sung). 22. Lessons (should learn/ should be learned/ should be learn) carefully. 23. I wish I (was/am/ are/ were) rich. 24. He wishes he (doesn't have to/ didn't have to/ don't have to) go to work today. 25. She wishes she (has/have/ had/ is having) a car. 26. We wish we (speak/ spoke/ speaking/ can speak) English well. 27. Reported speech with statements 28. He said that he (was going/go/ goes/ is going) to learn to drive. 29. He said that he was coming (tomorrow after/ the next day/ yesterday/ following toda 30. He said he (was repairing/ repairs/ repair) his bike then. 31. I told him that I (am/ was/ were) a teacher of English. 32. Lan said she (must/ has to/ have to/ had to) go to the market. 33. Reported speech with Yes/No questions 34. They asked me if (do I live/ I lived/ I live) in Bac Giang 35. The customer wanted to know what time (the manager came back/ the manager come back/ did the manager come back) 36. He asked me if ( do I live/ I lived/ did I live) in the city. 37. He asked me if (can I speak/ I can speak/ I could speak) Japanese. 6. Hoa asked Ba if (will he/ he will/ he would) go fishing. 38. Nam asked Lan whether (must she/she must/ she had to/ did she have to) do the housework. 39. She asked me if (I was/ I were/ was I/ I am) a teacher. 40. Hoa asked Nam whether (she likes/ she liked/ does she like) watching TV. 41. Hoa asked Lan if (she usually cooks/ she usually cooked/ did she usually cook) meals. 42. The man asked me how many students (there were / are there/ were there/ there are) in my class 43. He asked why (do I learn/ I learn/ I learned/ did I learn) English. 44. She asked what (must we do/ did we have to do/ we must do/ we had to do). 7. Hoa asked how (do I go/ I go/ I went/ Did I go) to work. 45. Ba asked where (did Hoa live/ does Hoa live/ Hoa lives/ Hoa lived). 46. The teacher asked us when (do we have/ did we have/ we had/ we have) Math. 47. She asked Tom how beef (does he want/ he wants/ he wanted/ did he want)

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