41. Don’t hesitate ____________ me a ring if any difficulty arises while ___________ the contract with the landlady. A. giving – having signed B. to have given – sign C. to give – signing D. being given – to be signing 42. The red squirrel is in danger of becoming extinct in England. What is the opposite meaning with the underlined word? A. existing B. inactive C. abolished D. ended 43. Anything he does is in ____________ with the law and that’s why I have suggested him for the post. A. compliance B. obedience C. commitment D. responsibility 44. My daughter has been accepted to the University of Michigan, so this time next week she’ll ___________ courses there. It is a four-year programme, so she will ____________ it in 2010. A. be attending – have finished B. have attended – be finishing C. be attending – be finishing D. attend - finish 45. “Would you mind lending me your bike?” – “_________________” A. Yes. Here it is. B. Not at all. C. Great. D. Yes, let’s. 46. His change of job has ___________ him with a new challenge in life. A. introduced B. initiated C. presented D. led 47. My brother is so eager to win in trivia games that he can’t bear other players ____________ him. A. running into B. putting up with C. coming across D. getting ahead of 48. It seems to be the big tour operators that take the _____________ share of the profits. A. lion’s B. snake’s C. tiger’s D. dog’s 49. He tends to forget things very quickly and behaves more and more like the typical ____________ professor. A. clear-minded B. absent-minded C. well-minded D. cool-minded 50. Solutions to the problem of unemployment ____________, but none of the measures that ____________ so far has been very successful. A. have sought – will be tried B. are being sought – have been tried C. have been seeking – are tried D. will be sought – have been trying

31. _________ of Albania was once forested, but __________ of the original vegetation remains, due to centuries of clearing and livestock grazing. A. Much – little B. Many – none C. Some – few D. Most - any 32. They continued to watch as the children began tossing small stones at their floating treasure, trying to halt its progress, when the sound of a horn startled them. What is the closet meaning with the underlined word? A. continue B. stop C. begin D. interrupt 33. __________ book I read recently about the housemaid who posed for __________ famous painting by Vermeer was informative as well as entertaining. A. A – any B. Any - ϕ C. ϕ – a D. The – a 34. Don’t be angry with Sue. All that she did was in good ________________. A. hope B. belief C. idea D. faith 35. Don’t you think that, since the two brothers do not speak to each other, we ______________ big problems getting their wives to sit together at the party? A. could have got B. may have had C. may be able to have D. might have 36. I hope you won’t take ______________ if I tell you the truth. A. annoyance B. offence C. resentment D. irritation 37. The teacher explained so much stuff in just one lesson that most of the students could __________ only half of it. A. get out B. let out C. take in D. break up 38. Subway systems may be built _________ city street or, in order to take a shortcut, they may pass ________ rivers. A. beneath – under B. in – across C. to – over D. with - about 39. “Can you give me some information?” – “_________________” A. No, thanks B. Yes, I can C. Certainly, sir D. I’d love to 40. Many young families have little or no ____________ of buying their own homes. A. aspect B. prospect C. concept D. view

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Khí hậu lục địa Nam Mĩ có tính chất nóng ẩm là do chịu ảnh hưởng của: A. Các dòng biển nóng chạy ven bờ B. Vị trí lục địa nằm giữa hai chí tuyến Bắc, Nam C. Gió Tín phong đông bắc, đông nam thường xuyên hoạt động D. Tất cả các đáp án trên

Em hãy nêu 3 ví dụ về cấu trúc hình cây trong cuộc sống mà em biết

21. Instead of condemning John. You ought to try to image yourself having to make the decisions he was forced to make ___________ in his position. A. had you been B. would you be C. if you would be D. if you were 22. I don’t want lots of excuse; I just want to hear the ____________ truth. A. clear B. plain C. pure D. right 23. The child fell _________ the old well because she did not see the hole in the ground when she was running ________ the field. A. onto – from B. into – around C. around – about D. from – to 24. John’s observation was a bit wide of the ________________. A. target B. mark C. point D. goal 25. The nasty field that dissolved any type of biological entity was one of the government's latest controversial creations. What is the opposite meaning with the underlined word? A. doubtful B. questionable C. peaceful D. uncertain 26. Before the children at the day care centre can have their snacks, they must _________ all the crafts and toys ________ in the plastic bins. A. put…away B. break…off C. hand…back D. pack…off 27. I’m ________________ my brother is. A. nothing near as ambitious B. nothing as ambitious than C. nowhere like so ambitious D. nowhere near as ambitious as 28. Cindy: “Your hairstyle is terrific, Mary!” – Mary: “____________________” A. Yes, all right B. Thanks, Cindy. I had it done yesterday C. Never mention it D. Thanks, but I’m afraid. 29. The students in Mr. Sharp’s evening class ___________ for almost fifteen minutes when he finally ___________ at the class door. A. have waited – appeared B. had been waiting – has appeared C. had been waiting – appeared D. have been waiting – appeared 30. John refused to put his career in ____________ by opposing his boss. A. jeopardy B. hazard C. risk D. stake

đốt cháy hết 14,4(g) 1 kim loại hóa trị II cần dùng 6,72 lít oxi ở đktc. tìm kim loại trên

LÀm hộ em ạ :)))))) làm nhanh ạ

Bạn nào giúp mình chọn đáp án đúng cho câu 4 này với :((

Trong các biểu thức sau, biểu thức nào không là đơn thức? -5(y + z) −5(y+z) y^3z^5 y 3 z 5 -5y^{3+5}z −5y 3+5 z (yz)^{8} (yz) 8