81. ___________eat too much salt or salty food because it is not good for your health. A. To do B. Do C. Did D. Don’t 82. ______do you play tennis, Dick? – I play tennis twice a week. A. How B. How often C. How much D. How many 83. I’m going___________the Ngoc Son temple next week. A. see B. sees C. to see D. saw 84. Lan and Nam often listen to music in ____________free time. A. their B. his C. her 85. Some robots _____________ dangerous work for us in the future. A. do B. will be able to do C. could do D. can do 86. In the near future, a super smart TV ___________ me surf the Internet, send and receive my e-mails and contact with my friends from all over the world. A. might help B. helped C. helps D. to help 87. _________ soldier robots ____________ automatically or under human control in 2050? A. Could – fight B. Will – be able to fight C. Do – fight D. Can- fight 88. If we _________ the use of plastic bags, our world ____________ greener. A. reduce – is B. reduce – could be C. reduces - will be D. reduce – will be 89.Many years ago, people __________ the Internet by phones. A. might not surf B. couldn't surf C. won't suft D. can’t surf 90. His future house ____________ under the ocean. A. is B. was C. will be D. could be 91. If robots can do all of our work, there ____________ nothing for us to do. A. would be B. is C. are D. will be 92. A smart clock _____________ play music, take photos and be a device for internet surfing in the future. A. might B. could C. is D. should 93. ___________ robots ____________ to people 20 years ago? A. Could – talk B. Could – talked C. Might – talk D. Will – be able to talk 94. In the near future, home robots ____________ all of housework for humans. A. could do B. do C. will be able to do D. did 95. I ______________ Tom and Jerry many times. A. see B. saw C. am seeing D. have seen 96. I’d like _______________a picnic. A. have B. has C. having D. to have 97. You can watch Harry Potter on TV________________ you can read it. A. or B. when C. but D. so 98. _________________ do you go to the gym? – By bus. A. What B. How C. Why D. Which 99.He _________ out with his friends last week. A. is going B. goes C. has gone D. went 100. In 1958, Pelé____________his first world Cup. A. has won B. won C. win D. wins 101. ____________ language do you speak? - I speak English. A. which B. where C. when D. how 102. My brother___________- our grandmother next weekend. A. visit B. are going to visit C. is going to visit D. am visiting 103. How_______________ do you watch television? – Every evening. A. many B. often C. much D. old 104. It’s very hot. Why ________________go swimming? A. don’t we B. not we C. let us not D. we don’t 105. What about _______________by bus? A. we go B. going C. to go D. go 106. How_______________is a sandwich? - It's 2,000 dong. A. many B. much C. old D. often 107_____________is the weather like in the summer? A. What B. Which C. How D. When 108. My future house will have a hi-tech robot to__________the floors. A. clean B. cleaning C. cleaned D to clean 109. Hoa has never ________ to London . A. been B. is C. was D. be 110. How much _________do you want? A. eggs B. tea C. oranges D. apples

7. While we (were running/ run) in the park, Mary fell over. 10. They (were watching/ watched) football on TV all day. Hộ mình với mọi người ơi

It was impossible that you saw Joe in town. A.You mustn’t have been in town. B. You shouldn’t have seen Joe in town. C. Joe was not in town. You must have seen someone else. D. It couldn’t have been Joe you saw in town.

giúp em giải với ạ em cảm ơn nhiều ạ

giải ptr 1 : cos2x - sin2x = 0 2 : 2cos^2x + 5sinx - 4 = 0 3 : 5sinx(sinx-1)-cos^2x=3

Mọi ngừoi giúp em Vd1 và Vd3 với

một bể nước dạng hình hộp chữ nhật có các kích thước lòng bể là 1.8m ; 1.5m và 1.2m .Trong bể đang chứa nước chiếm 75% thể tích lòng bể. Hỏi trong bể đang có bao nhiêu lít nước ( mọi người giúp em voi )

41. ____________because it is harmful for environment! A. Not litter B. Litter C. Do litter D. Don’t litter 42. He might __________ on the Moon in the future. A. lives B. live C. to live D. living 43. Don’t phone Ann now. She _____________be having lunch. A. might B. can C. must D. has to 44. I_____________ to Singapore three times. A. have gone B. have been C.went D. visited 45. My brother can’t swim_____________he’s afraid of water . A. because B. but C. and D. so 46. There aren’t _____________ good films on TV at the moment. A. some B. any C. much D. a lot 47. “__________ do you go camping?” –“Rarely” A. When B. Where C. How D. How often 48. Which subject is __________, mathematics and English? A. more difficult B. difficulter C. difficult D. the most difficult 49. I never meet __________ interesting people nowadays. A. some B. any C. a D. the 50. She’s small __________ beautiful. A. and B. but C. so D. also 51. __________ do you usually go out with? A. Who B. What C. When D. Where 52. Sarah is__________ than Marta. A. more friends B. friendly C. friendlier D. more friendly 53. Many people think that Venice is__________ city in the world. A. the beautiful B. more beautiful C. very beautiful D. the most beautiful 54. “Does July often take the bus?”—“Yes, __________” A. she always does B. she rarely does C. she never does D. she ever does 55. __________ visit her family? A. John sometimes B. Is John sometimes visiting C. Does John sometimes D. Sometimes John 56. In the future, we ________ go on holiday to the Moon or other planets. A. could B. must C. might D. should 57. Robots make car manufacturing ________ because they can take on dangerous jobs in place of humans. A. stronger B. safer C. larger D. heavier 58. ________ robots can help to teach children in the classroom, they will never replace teachers. A. When B. Although C. Because D. If 59. ________ robots be able to feel and behave like us? A. Will B.Can C. Do D. Are 60. _______ robots take our jobs, what will humans do all day? A. When B. Whether C. If D. Although 61. It was so noisy that we _______ hear ourselves speak. A. can B. mustn’t C. could D. couldn’t 62. _____the newsreaders on BBC reads very fast, my brother can hear everything in the news. A. But B. Although C. When D. Because 63. Have you ever _________ to Singapore? A. be B. been C. went D. go 64. Japan is one of ______________countries in the world. It costs you a lot of money to live there. A. the most expensive C. the more expensive B. most expensive D. more expensive 65. Will robots be able ______________ our voices? A. to recognize B. recognizing C. recognized D. recognizes 66. My uncle ______________ a new apartment for a month. A. bought B. has bought C. buys D. will buy 67. I’ll get the news tomorrow, so I ______________ phone and tell you. A. won’t B. will be C. will D. can’t 68. We can watch TV programmes from other countries by ______________ wireless TV. A. use B. to use C. using D. used 69. “_____________?” “Every day” A. What kind of junk food do you eat B. Who eat junk food C. How often do you eat junk food D. Why do you eat junk food 70. “I don’t have to work today”. – “… ” A. Why don’t we to go out somewhere? B. Let’s going out somewhere. C. What about go out anywhere? D. How about going out somewhere? 71. “Which sport do you like best?” –“ ” A. I think soccer is very exciting B. I don’t enjoy playing table tennis C. Skiing is very dangerous D. I never play tennis 72. Andrew is taller than Martin. A. Andrew is very tall. B. Martin isn’t as tall as Andrew. C. Martin is a little shorter than Andrew. D. b & c are correct. 73. My family enjoys watching game shows ______ they are very exciting and interesting. A. so B. because C. but D. and 74. My sister enjoys ____________ table tennis in her free time. A. playing B. play C. to play D. to playing 75. Japan is one of __________ countries in the world. It costs you a lot of money to live there. A. the most expensive C. the more expensive B. most expensive D. more expensive 76. ___________ draw on the walls and tables, please. A. Do B. Don’t C. Should D. Shouldn’t 77. I_____________ to Singapore three times. A. have gone B. have been C.went D.visited 78. There aren’t _______________ good films on TV at the moment. A. some B. any C. much D. a lot 79. They have been in love with each other ____________ they were young. A. while B. until C. for D. since 80. The Nile River is the ____________ river in the world. A. high B. longest C. longer D. highest

a.(3 √ 18+2 √50-4 √72).8 √ 2 b.(-4 √ 20+5 √500-3 √45): 8 √ 2

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