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Biến đổi tiếp TH1 phần tử số em đang làm dở đến hết TH1 thôi ạ
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61. She ………very angry when she knows this A. shall be B. has been C. was D. will be 62. They ………….to build a new McDonalds in several days. A. will start B. have started C. started D. starts 63. last night, I …………a motorbike along a busy street in the center when I saw some strangers. A. was rode B. were riding C. was riding D. rode 64. I ……..swim in this river when I was young. A. used to B. am use to C. use to D. am used to 65. When you ……the car, you’ll agree with me about it. A. saw B. have been C. see D. was seeing 66. When I was young, I ……..to be a singer. A. want B. was wanting C. wanted D. had wanted 67. Ted and Tomy …………in New York for a week. A. have gone B. have been C. are D. was 68. Sorry, I can’t stop now. I’m going …………the doctor. A. see B. seeing C. to see D. is seeing 69. The books, an English dictionary and a chemistry text, ………..on the shelf yesterday. A. was B. were C. have been D. are 70. Have you ever…………any skiing? A. do B. doing C. did D. done 71. They ………….that bridge when I was there last year, they haven’t finished it. A. are building B. built C. was building D. were building 72. I …………..about you a lot lately and I have come to the conclusion that I won’t be able to live without you. A. have think B. have thought C. thought D. think 73. They ………….only 25 new students into the department in 1994. A. admit B. were admit C. admitted D. have admitted 74. The Ajax Shoe Company……………25 new men next month. A. employs B. employed C. will employ D. employ 75. He ………to the theater three times this month. A was B. is C. will be D. has been 76. He…………..the experiment when the lights went out A. was making B. made C. makes D. will make 77. Think carefully. I’m sure you……….his name. A. remember B. remembered C. will remember D. shall remember 78. last night we were watching television when the power ………… A. failed B. was failing C. had failed D. failing 79. The noise from the trains ……….me terribly last night. A. annoy B. were annoying C. annoied D. annoyed 80. We …….for three hours and are very tired. A. walk B. have walked C. walked D. had walked

Bài 7: Hòa tan 40 gam lưu huỳnh trioxit vào cốc nước, sau phản ứng thu được 400 ml dd B. a. Tính nồng độ mol của dd B? b. Hòa tan 24 gam đồng(II) oxit vào B, sau khi phản ứng xảy ra hoàn toàn thu được dd D. Tính nồng độ mol của chất có trong dd D? Bài 8: Khử hoàn toàn 11,6 gam một oxit sắt bằng CO. Khối lượng sắt kim loại thu được ít hơn khối lượng oxit sắt ban đầu là 3,2 gam.Tìm công thức của oxit sắt. Bài 9: Cho luồng khí CO đi qua 16 gam oxit sắt nguyên chất được nung nóng trong một ống sứ. Khi phản ứng thực hiện hoàn toàn và kết thúc, thấy khối lượng ống giảm 4,8 gam. Xác định công thức của oxit Sắt đã dùng. Bài 10: Để khử hoàn toàn 8 gam oxit của một kim loại cần dùng 3,36 lít khí H2. Hoà tan hết lượng kim loại thu được vào dung dịch HCl thấy thoát ra 2,24 lít khí H2 ( các khí đều đo ở đktc ). Hãy xác định CTPT của oxit kim loại đó. giúp với ạ :>>

51. She …………at the door before she entered the office. A. has knocked B. knocks C. have knocked D.had knocked 52. The boy………when the explosion occurred A. is sleeping B. slept C. was sleeping D. sleeps 53. ………….everything already? Yes, he ………his part of work long ago. A. Has he done B. Did he do/has done C. Has he done/ did D. Did he do/ did 54. She ……….this exercise yesterday at 8 o’clock. A. wrote B. has written C. has writting D. was writing 55. I………………the article when I come home. A. translate B. will translate C. translated D. was translating 56. Her brother …………in Canada at the moment A. working B. works C. work D. is working 57. I……………you for ages. A. didn’t meet B. wasn’t meeting C. has met D. haven’t met 58. We will have supper when you ………..home. A. return B. returned C. have returned D. were returning 59. The library ……before I got there. A. closed B. has closed C. had closed D. have closed 60.The Olympic Games………….every four years. A. take place B. took place C. is taking place D. will take place

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