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Giải giúp mình với ạ, câu sai thì chỉ ra câu đúng giúp mình ạ

71. In spite of being able to walk to his school, he drove his motorbike. Although____________________________________________ 72. I began to read this novel last week. I have ____________________________________________ 73. I have never eaten such a good dish before. It is the first time____________________________________________ 74. This road is much farther than that one. That road is ____________________________________________ 75. She can swim 25m non-stop. She is ____________________________________________ 76. I think that I can build a small tree house in 3 weeks with my friends’ help. (able) I think I will ____________________________________________ 77. I want to have a lot of money to travel around the world. (will) If I have ____________________________________________ 78. People will be able to save our environment if we stop making it polluted. (ability) People will have ____________________________________________ 79. He promises to give away his clothes to the poor people. (will) He promises that ____________________________________________ 80. Despite not being able to come to Sue’s birthday party, Dave sent the gift to her. (couldn’t) Although ____________________________________________ 81. I was able to ride a bicycle when I was 7 years old. (could) I ____________________________________________ 82. I couldn’t visit Glasgow because I didn’t have enough time. (able) I ____________________________________________ 83. I want to have a private tutor. I will learn better. (will) If I have ____________________________________________ 84. Some robots in the future will have the ability to do all the housework. (able) Some robots ____________________________________________ 85. Maybe he will participate in this recycling campaign. (probably) He will____________________________________________ 86. I think robots can do many things like humans in the future. (able) I think ____________________________________________ 87. My grandfather has to wear his glasses to read newspapers. My grandfather ________________________________without wearing his glasses (can’t) 88. Despite being able to lend the poor man some money, she didn’t do so. (could) Although she ____________________________________________ 89. Running non-stop in 30 minutes is beyond her ability. (can’t) She ____________________________________________ 90. Some robots in the future will have the ability to take care of patients. (able) Some robots ____________________________________________ 91. Baseball is more popular than other port in the USA Baseball is ____________________________________________ 92. Nick was given a ticket to a baseball game by his friend Akiko Nick’s friend Akiko ____________________________________________ 93. Nick has never been to a baseball game before. This is ____________________________________________ 94. In the game, the Dolphins team plaed better than the Giants. In the game, the Giants team didn’t play ____________________________________________ 95. Now Nick can’t wait for the next game. Now Nick is really looking ____________________________________________ 96. If I finish my work, I can go out at the weekend. I can’t go out ____________________________________________ 97. My parents sggested going out for a meal. My parents said: “ Why ____________________________________________” 98. They spent two hours watching the film. It ____________________________________________ The film ____________________________________________

51. What is the length of this river? How ____________________________________________ 52. I spend two hours a day doing my homework. It ____________________________________________ 53. This building belongs to my brother. This is ____________________________________________ 54.What are your plans for the weekend? (do) What ____________________________________________ 55. Peter knew how to skate when he was 12. (could) Peter ____________________________________________ 56. The last time they visited Europe was two years ago. (not) They ____________________________________________ 57. Robots are not as intelligent as humans. (than) Humans____________________________________________ 58. How long have you learned English? (start) When ____________________________________________ 59. Robotics doesn’t really interest me. (in) I’m ____________________________________________ 60. Jack participated in a robotics competition last month. (part) Jack ____________________________________________ 61. This robot is capable of cooking a variety of different meals. (can) This robot____________________________________________ 62. My computer didn’t work last night, so I couldn’t email you. (because) I ____________________________________________ 63. I do not run as fast as I did when I was young. (could) When I ____________________________________________ 64. It wasn’t necessary for me to finish my homework yesterday. (need) I ____________________________________________ 65. She started to work at the school canteen two months ago. (for) She ____________________________________________ 66. You should study hard, or you won’t pass the exam. (will) If you ____________________________________________ 67. Because they were hungry, they ate all the food left in the fridge. They were ____________________________________________ 68. It is the most wonderful beach I have ever been to. I have never ____________________________________________ 69. Mary has lived in Tokyo for 5 years. Mary started ____________________________________________ 70. “I advise you not to come to his birthday party.” “I think you ____________________________________________

Cho a,b;c>0 tm: a+b+c=3 CM: $\frac{a^{3} }{(a+1)(b+1)}$ + $\frac{b^{3} }{(b+1)(c+1)}$ + $\frac{c^{3} }{(c+1)(a+1)}$$\geq$ $\frac{3}{4}$

Giúp mk câu c thôi ạ ko cần vẽ hình hay lm câu a,b cũng đc hứa sẽ vote 5* + câu trả lời hay nhứt ạ ^^ Cho tam giác ABC nhọn có 2 đường cao BC và CF a. CMR : AD.AC=AE.AB b. CMR : góc AED = góc ACB c. gọi H và K lần lượt là hình chiếu của B và C lên đường thẳng DE CMR : HE=DK

31. We started to study English four years ago. We have ____________________________________________ 32. We took a train to Liverpool last Saturday We got ____________________________________________ 33. We stop the football match because of the bad weather. Because the weather ____________________________________________ 34. Jone plays chess better than Mike. Mike doesn’t ____________________________________________ 35. Her book is the same as mine. Her book is ____________________________________________ 36. What was your height last year? How ____________________________________________ 37. How much is the blue schoolbag? What is ____________________________________________ 38. How much does a box of chocolates cost ? What ____________________________________________ 39.Let’s walk to school! Why ____________________________________________ 40. How much does a box of chocolate cost? What ____________________________________________? 41. Does your father cycle to work? Does your father get ____________________________________________? 42. I last saw her two months ago I ____________________________________________ 43. Why don’t we take a trip to Ho Chi Minh city this Tet holiday? What ____________________________________________Ho Chi Minh city this Tet holiday? 44. The beach is close to the hotel, so we can walk there. We can go ____________________________________________because it’s close. 45. I last saw Peter five month ago . I haven’t ____________________________________________ 46. How much is a bottle of water? What ____________________________________________? 47. Let’s dance and sing a song. What about ____________________________________________? 48. How high is the Mount Everest? What ____________________________________________? 49. He often flies to Lon Don. ____________________________________________ 50. This film is more interesting than that one. That film is ____________________________________________

Giúp mk vs ạ hgfđggggggggggggbnnnnnnnbbbhhhhhhhh

𝐂â𝐮 𝟏.[NB] Biểu thức nào sau đây không là đơn thức∶ A. 4x3y(− 3x ) B. 1+ 𝑥 C. 2xy (− x3 ) D. 17𝑥2.(−13)𝑦3 𝐂â𝐮 𝟐.[𝐓𝐇] Tích của hai đơn thức 2x2yz và (−4xy2z)bằng∶ A. -8x3y3z2 B. -8x3y3z C. -6x2y2z D. 8x3y2z2

16. Our resources of energy will soon end because we won’t try to save it. If __________________________________________________________ 17. She likes to live in the countryside. She enjoys __________________________________________________________ 18. __________________________________________________________? The new programme often finishes at eight o'clock. 19. It is necessary for us to be present at the class discussion on Saturday. We must 20. I find it difficult to find a better solution to that problem. I have 21. How much is this hat? How much does ____________________________________________? 22. Why don’t we sing an English song? What about ____________________________________________? 23. What’s your father’s weight? How heavy ____________________________________________? 24.Doing exercises every morning is good for you. It ____________________________________________ 25. Lan likes playing tennis the most. Tennis ________________________________________ 26. My brother plays the guitar very well. My brother is ___________________________________ 27. Nick has never been to Da Nang before. This is _________________________________________ 28. Miss Lan teaches us Vietnamese everyday. ____________________________________________ 29.He is going to saty in Hanoi for a week. ____________________________________________ 30. It takes me fifteen minutes to walk to school. ____________________________________________