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2 năm trước
Một xe chạy 5 giờ,2 giờ đầu với vận tốc 60 km/h 3 giờ sau xe chạy với vận tốc 40 km/h. Tính vận tốc trung bình của mỗi xe trong suốt thời gian chuyển động ĐS:48km/h
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Mong được giúp đỡ ạ, em cảm ơn nhiều, tầm 10 câu ấy ạ 40. The thick layer of these gases traps more heat ……… the sun, which leads to the increase in the earth’s temperature. A. from B. for C. about D. of 41. ……………..about the effects of global warming is the first important step towards solving this problem. A. Well-informed B. Being well-informed C. Having informed D. Had been informed 42. They planted trees,…………. money for wildlife protection. A. raised B. rose C. lifted D. increased 43.Everybody can make ………..contributions to slow down climate change. A. significant B. significance C. significantly D. insignificant 44. Planting trees can contribute to reducing global warming as trees…….and absorb CO2 in the air. A. stop B.prevent C. vapour D. capture 45. It’s important to raise people’s……..about the dangers of global warming. A. fund B. money C. awareness D. donation 46. They were criticised for having acted ………….towards the envirnment. A. responsible B. irresponsibly C. responsibly D. irresponsible 47.Many scientists agree that global warming poses great threats to all species on Earth. A. annoyances B. risks C. irritations D. fears 1. - Andrew: What would you like for dinner? - Laura: ______ we’re both so tired, why don’t we order a pizza? 48. - Peter: Is our breakfast OK? - Mary: Yeah, mom is ______ it ready. A. doing B. getting C. cooking D. All are correct 49. - Mrs. Smith: You made a lot of noise last night! - David: ______ A. Really? B. What a pity! C. Oh! I’m really sorry! D. It’s kind of you to say so. 50._______ is the existence of a wide variety of plant and animal species living in their natural environment. . a. Biodiversity b. Conservation c. Globe d. Individual

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