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2 năm trước
Bài 9: Đốt nóng đồng trong oxi tạo thành 16 gam đồng (II) oxit a. Lập PTHH của phản ứng trên. b. Tính thể tích oxi ở đktc đã tham gia phản ứng. c. Tính khối lượng đồng đã tham gia phản ứng.
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Ac giúp em với ạ, vì dài và thời gian cũng không gấp nên ac làm được thì làm từ từ roii giúp em với a:((( Em hứa sẽ vote đủ ạ 1. (Enter) the room, he (greet) everybody most kindly. 2. I love him but I (be) afraid I never (marry) him. 3. I already (buy) some bricks and I (build) a garage. 4. Unless it (rain), crops (be) destroyed. 5. I (give) you a cigarette if I (have) one, but I'm afraid I haven't. 6. Look! It (rain). 7. He (stop) smoking two months ago. 8. What you (like) doing when you are free? 9. A lot of new houses (build) in Hanoi suburbs at present. 10. Last week a new table (make) for me by my father. 11. Three letters (write) to his friends abroad tomorrow. 12. Ten lessons (learn) so far by us. 13. He (thank) me for what I had done for him. 14. Every one of the men (be) looking for a job. 15. Since Robert was living in Rome, I (not have) a word from him. 16. We (sit) in the car outside the house when the inspector called. 17. When he came home, he (tell) his mother what he (see) at school. 18. I don’t allow (smoke) in my drawing room. 19. He didn’t dare (leave) the house because he was afraid of (meet) someone who might (recognize) him. 20. I (teach) hundreds of students but I never (meet) such a hopeless class as this. 21. That film (come) to the local cinema next week. You (want) to see it? 22. It is he or I who (be) to go. 23. After he (do) his homework, he went to the cinema. 24. I am prepared to support anything he (say) tomorrow. 25. Sometimes I getup before the sun (rise). 26. Since he (buy) a new car, he (drive) to work every day. 27. If we (know) who he was, we (invite) him. 28.The gray and blue blanket (wash) yesterday. 29. It’s the British English that (be) spoken all over the world. 30. They (come) here a month ago. 31. She (go) to school everyday. 32. It (not rain) here since March. 33. It would have been better if you (wait) for him. 34. When we (take) our exam, we’ll have a holiday. 35. They had their exercises (correct) last week. 36. If the story hadn’t been true, the newspaper (not print) it. 37. He acts as if he (know) English perfectly. 38. If you (wait) much longer before you (make up) your mind, it (be) too late. 39. When he first (arrive), he (can not) speak a word of English. He never (study) it before. 40. He (believe) whatever you tell him. 41. She just (finish) the best performance. 42. A new hotel (build) near Thu Le zoo at the moment. 43. I used to go (ski) when I (be) at University. 44. I’m tired of you’re your childish behavior. When you (grow) up? 45. I (wait) for you at the hotel at midday tomorrow. 46. Eastfield (not win) unless they begin playing better. 47. It (be) good for your health to do morning exercises. 48. Many of rare animals would be extinct if we (continue) to kill them. 49. When the teacher came in, they (hang) two pictures on the wall. 50. “ Why is the ground so wet?” – “ It (rain) last night.” 51. If you kicked the policeman, you (arrest). 52. We (walk) for about twenty minutes when a car (stop) and the driver (offer) us a lift. 53. I’ll let you know when he (arrive). 54. I suddenly felt an insect (crawl) up my leg. 55. I (finish) it by tomorrow. 56. If Lam passes his exam, he (go) to University. 57. When I first met him, he (study) painting. 58. The film on TV last night was very sad. It made my mother (cry). 59. Children always (do) things noisily. 60. As a child, he (think) that diamonds were pieces of glass. 61. I want my children (go) to the dentist every six months. 62. I remember (pay) him. I gave him $ 5. 63. I don’t mind (wait). It is better (be) too early than too late. 64. Your hair needs (cut). You’d better (have) it done tomorrow. 65. They (build) that bridge when I (be) there last year, they haven’t finished it yet. 66. You (be) out in the rain, you (have) better take off your shoes. 67. The only thing I haven’t got is a garden. If I (have) one, I (grow) a lot of flowers. 68. Do you feel like (dine) out or would you rather (have) dinner at home? 69. When I first (come) to this village, it was a quiet place. But since then a lot of houses (build). 70. There are some people who can’t help (laugh) when they see someone (slip) on a banana skin. 71. After the explosion, only two people were left (live). 72. He has a good (know) of science. 73. His long and boring (speak) made us bored. 74. You are very (differ) from your brother. 75. My mother never showed it if she was (disappoint) with me. 76. The rice couldn’t have grown if it (not rain). 77.Grapes won’t grow well unless the climate (be) mild. 78. Cakes of soap, animal skins and iron bars (be used) as money for a long time. 79. I didn’t hear your (come) in. You must (be) very quiet.

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