Cho đoạn thẳng AB. Trên cùng một nửa mặt phẳng có bờ là đường thẳng AB vẽ hai tia Ax, By lần lượt vuông góc với AB tại A, B. Gọi O là trung điểm của đoạn thẳng AB. Trên tia Ax lấy điểm C và trên tia By lấy điểm D sao cho \(\hat{COD}\) = \(90^{o}\)
a. Gọi E là giao điểm của CO và BD. CMR: tam giác DCO = tam giác DOE từ đó suy ra AC+BD=CD
b. Qua C kẻ đường thẳng song song với AB cắt OD tại H. CMR: EH vuông góc với CD

Ba bạn Hoa, Mai và Minh cùng được giải ba trong cuộc thi của lớp. Ban giám khảo phát tiền thưởng cho Hoa bằng các tờ 2 2 000 000 đồng, cho Mai bằng các tờ 5 5 000 000 đồng và cho Minh bằng các tờ 10 10 000 000 đồng. Biết rằng tổng số tờ tiền cả ba bạn nhận được là 56 56. Khi đó: + Giải thưởng của Hoa gồm tờ tiền; + Giải thưởng của Mai gồm tờ tiền; + Giải thưởng của Minh gồm tờ tiền.

c1. I woke ______ late this morning and missed the first bus to school. 2. Can you turn ______ the lights? It's too dark to see anything. 3. We need to give ______ the books to the library before they charge us. 4. She looked ______ her younger brother while her parents went to the grocery store. 5. He decided to give ______ eating junk food to stay healthy and feel better. 6. They set ______ early to reach the beach before it became crowded with tourists. 7. I always take ______ my shoes when I enter someone's home as a courtesy. 8. The car broke down on the highway, so we had to call ______ help. 9. She ran ______ her old school friend at the shopping mall last weekend. 10. Please fill ______ this form before submitting your application for the library card. 11. The teacher asked us to write ______ all the important points during the lesson. 12. I don't know how to deal ______ this situation. It's really complicated for me. 13. We put ______ warm jackets because it was freezing cold outside that afternoon. 14. He always looks ______ ______ his grandfather because of his wisdom and kindness. 15. The fire alarm went off when someone tried to light ______ a cigarette indoors. 16. She asked me to pick ______ the package from the post office on my way. 17. They told us to keep ______ of the construction site because it was dangerous. 18. Can you check ______ this new book from the library? It's very popular. 19. We need to hurry ______ if we want to catch the last train tonight. 20. She put ______ her plans to travel because of the sudden change in weather. 21. I always wake ______ early on weekends to enjoy the morning air in the garden. 22. He takes ______ his mother in both looks and personality, which everyone finds amazing. 23. The children ran ______ from the barking dog because they were scared of it. 24. My friend helped me sort ______ my closet and donated some clothes to charity. 25. We came ______ an old diary while cleaning the attic of our house yesterday. 26. I don't want to give ______ the secret, so please don't ask me anymore. 27. She asked me to sit ______ and explain everything that had happened at the meeting. 28. He had to look ______ the word in the dictionary because he didn’t know it. 29. Please hold ______ while I check if the manager is available to speak with you. 30. My computer is slow, so I'll shut it ______ and restart to fix the issue. 31. We decided to stay ______ and watch movies because it was raining heavily outside. 32. The kids always look ______ ______ holidays because they get to play all day long. 2012 CƠ BẢN - FILE SỐ 105 - 13/01/2025 By [3T] – LIFE © All rights reserved! Page 2 33. He asked me to carry ______ with the task while he went to make a call. 34. I was so tired after work that I just wanted to lie ______ for a while. 35. Don’t forget to turn ______ the lights before you leave the room, please. 36. She picked ______ a lovely dress to wear to her cousin’s wedding next weekend. 37. I can’t believe they managed to get ______ ______ cheating on the final exam. 38. Let’s go ______ the instructions once more to make sure we understand everything. 39. He likes to show ______ his new gadgets to his friends whenever they visit him. 40. The teacher asked us to break ______ the problem into smaller parts to solve it. 41. We ran ______ ______ sugar, so I had to borrow some from the neighbor. 42. The baby started to calm ______ after his mother sang him a lullaby. 43. I put ______ some decorations for the party, and everyone said they looked beautiful. 44. Let’s call ______ the meeting since most people can’t attend because of the weather. 45. She found ______ that the store was closed after walking all the way there. 46. He asked me to take care ______ his dog while he went on a business trip. 47. The flight attendants told the passengers to buckle ______ before the plane took off. 48. We should cut ______ ______ eating sweets if we want to stay healthy this year. 49. He couldn’t keep ______ ______ the group because he was walking too slowly uphill. 50. The team worked hard to put ______ the presentation for the annual meeting tomorrow. 51. She accidentally knocked ______ the glass of juice, and it spilled all over the table. 52. Can you hand ______ these flyers to the people waiting outside the event hall? 53. I forgot to put ______ my clothes after doing laundry, so my room looks messy. 54. He ran ______ the bus, but it left before he could get on. 55. They set ______ a tent near the river and enjoyed camping under the stars. 56. We decided to check ______ at the hotel first before exploring the nearby tourist spots. 57. He wanted to work ______ at the gym, so he joined a new fitness class. 58. The kids got ______ from the park completely tired but very happy after playing all day. 59. She had to drop ______ her children at school before heading to the office. 60. I’ll call ______ the customer after lunch to discuss the details of the order. 61. The children grew ______ in a small town surrounded by mountains and beautiful scenery. 62. The students asked the professor to go ______ the answers to the quiz in detail. 63. I need to take ______ the jacket I bought because it doesn’t fit me properly. 64. Please watch ______ for cars while crossing the street. It’s a very busy area. 65. We need to find ______ who left the package at our doorstep this morning. 66. The manager asked us to carry ______ the instructions exactly as mentioned in the email. 67. I need to log ______ to my account to check my emails and notifications. 68. We’ll run ______ the schedule once more to make sure everyone knows their responsibilities. 69. I couldn’t get ______ how beautiful the sunset looked from the top of the hill. 70. She decided to move ______ after realizing that dwelling on the past wasn’t helping her. 71. He tried to look ______ the papers to find the one he had misplaced. 72. The tourists asked for help when they couldn’t figure ______ how to use the map. By [3T] – LIFE © All rights reserved! Page 3 73. We should step ______ and consider all options before making a final decision. 74. She asked me to check ______ ______ her plants while she was on vacation. 75. He didn’t want to turn ______ the offer because it was a great opportunity. 76. They asked the children to calm ______ after they started running around the house wildly. 77. We decided to go ______ for dinner to celebrate my brother’s promotion at work. 78. The little boy started to cry ______ when he couldn’t find his mother in the crowd. 79. Let’s look ______ the issue further before we decide what action to take next. 80. I had to work ______ my presentation all night because it was due the next day. 81. She forgot to pick ______ her keys, so she couldn’t get into her apartment. 82. He asked us to stand ______ and wait for instructions before entering the room. 83. Please keep ______ from the wet floor to avoid slipping and hurting yourself badly. 84. The plane finally took ______ after a long delay caused by the bad weather. 85. I couldn’t figure ______ the puzzle, so I asked my friend for help with it. 86. They asked us to step ______ and help with organizing the event for the community. 87. She promised to call ______ the meeting if more people couldn’t join due to the strike. 88. I had to put ______ a quick meal because there wasn’t much food in the fridge. 89. The lights suddenly went ______, so we lit some candles to brighten the room. 90. Please throw ______ any garbage before leaving the park so it stays clean for everyone. 91. He wanted to hang ______ with his friends after school, but they all had homework. 92. The students were told to sit ______ quietly while waiting for the teacher to arrive. 93. I’ll catch ______ with you later after I finish the work on my desk. 94. She couldn’t take ______ all the information during the meeting because it was too overwhelming. 95. The children were told to put ______ their toys and start cleaning up the playroom. 96. He asked us to give ______ our seats for the elderly passengers on the crowded bus. 97. Let’s sort ______ this problem together so we can find a solution quickly and efficiently. 98. The students decided to join ______ the singing competition being held at their school festival. 99. I had to clean ______ the kitchen after the party because it was a complete mess. 100. We should turn ______ now because we’re going the wrong way to reach the restaurant. giúp mình với=))

Write a letter about 150 – 200 words to a pen friend to tell about some activities you did to help your neighbourhood greener and cleaner . You should base on the suggestions below.

- Where is your neighbourhood? (in the city, near a city, in the country, in the mountain, etc.)

- What environmental problem you can see in your neighbourhood? (littering, pollution, etc.)

- What did you do to help your neighbourhood greener and cleaner ?

- How do you feef about those activities ?

Write a paragraph of about 150 – 200 words about a meal you had in a restaurant . You should base on the suggestions below.

- When?

- Where is the restaurant?

- How many dishes did you have?

- How were they?

- What was your feeling?