Có 50ml dung dịch Ba(OH)2 1M, thêm vào 200ml nước thu được dung dịch X. Nồng độ ion OH- trong dung dịch X là A. 1M B. 0,4M C. 0,6M D. 0,8M

1.​We cancelled the match 3 minutes after it started due to the heavy rain. A.​called off. ​B. carried on​. C. got off 2.​He removed his coat and hang it on before coming into the room. A. put on​ B. put out ​C. took off 3.​Sally looks like her mother, doesn’t she? A. looks at​B. takes after​C. looks after 4.​His book will be published next summer. A. come in​B. come out​C. go out 5.​He resigned from his job after getting involved in the argument with the boss. A. gave up​B. gave back​C. went out 6.​That’s a good idea but I need time to meditate about it. A.​run over​B. think over​C. get over 7.​The World War I began in 1914. A.​broke down​B. broke into​C. broke out 8.​We need to discover how the information came out to the public. A.​try on​B. find out​C. work out 9.​You can search the meaning of these words in the dictionary instead of asking me. A.​look at​B. look on​C. look up 10.​A good friend will always support you. A.​stand for​B. stand by​C. turn down

Cho tứ giác MNPQ có MN = MQ, PN = PQ, P = 90°, M = 52°. Chứng minh MP⊥ NQ và tính góc ngoài tại Q

10 Read the following passage, then choose the correct answer to questions: Yesterday, on the way home from school, I saw an accident. A boy was run over by a taxi when he was riding his bicycle. The boy"s leg was broken and it was bleeding badly. Someone there tried to stop the bleeding. They put pressure on it and held it tight. A man used his mobile phone to call the emergency service. Some minutes later, an ambulance arrived and sent the boy to the hospital. Two policemen came to the scene immediately. Some people told the police that the taxi driver was driving at a very high speed when the accident happened. Some others began talking about the traffic accidents these days and blamed the increasing number of accidents on the roads for careless driving and drunk drivers. Why does the number of accidents begin to increase these days? A. Because people don’t watch when crossing the roads. B. Because of careless driving and drunk drivers. C. Because careless driving and drunk drivers. D. Because drivers don’t stop when the lights turn green 11 Mark the letter A, B, C, D on your answer sheet to indicate a meaningful sentence from the words and phrases given parents / I went / Thailand / take part / the Songkran Festival / last April. A. My parents and I go to Thailand to take part in the Songkran Festival last April. B. My parents and I went to Thailand and take part in the Songkran Festival last April. C. My parents and I went to Thailand to take part with the Songkran Festival last April. D. My parents and I went to Thailand to take part in the Songkran Festival last April. 12 Mark the letter A, B, C, D on your answer sheet to indicate a meaningful sentence from the words and phrases given Save / energy / one / best / way / conserve / natural / resources // A. Saving energy is one of the best ways to conserve natural resources. B. Save energy is one of the best ways conserve natural resources. C. Saving energy is one of the best ways conserve natural resources. D. Save energy is one of the best ways to conserve natural resources. 13 Choose the sentence which has the same meaning with the given one. Despite the fact that it was snowing, I didn’t feel cold. A. Although I didn’t feel cold, it was snowing B. In spite of the snow, I felt quite cold. C. In spite of feeling warm, it was snowing. D. Although it was snowing, I didn’t feel cold. 14 Read the following passage, then choose the correct answer to questions: Yesterday, on the way home from school, I saw an accident. A boy was run over by a taxi when he was riding his bicycle. The boy"s leg was broken and it was bleeding badly. Someone there tried to stop the bleeding. They put pressure on it and held it tight. A man used his mobile phone to call the emergency service. Some minutes later, an ambulance arrived and sent the boy to the hospital. Two policemen came to the scene immediately. Some people told the police that the taxi driver was driving at a very high speed when the accident happened. Some others began talking about the traffic accidents these days and blamed the increasing number of accidents on the roads for careless driving and drunk drivers. What part of his body was hurt? - His _________. A. shoulder B. head C. leg D. arm 15 Mark the letter A, B, C, D on your answer sheet to indicate a meaningful sentence from the words and phrases given people / love / festivals / because / advantages / they / bring about. A. People love festivals because with the advantages they bring about. B. People love festivals because the advantages they bring about. C. People love festivals because of there are advantages they bring about. D. People love festivals because of the advantages they bring about. 16 Read the following passage, then choose the correct answer to questions: The world’s first film was shown in 1895 by two French brothers, Louis and Auguste Lumiere. Although it only consisted of short and simple scenes, people loved it and films have been popular ever since. The first films were silent, with the title on the screen to explain the story. Soon the public had their favourite actors and actresses and the first film stars consequently appeared. In 1927, the first “talkie”, a film with sounds, was shown and since then the public would only accept this kind of films. Further improvements continued, particularly in America, where 90 percent of all films were produced. With the arrival of television in the 1950s, fewer people went to see films. However, in recent years, the number of audiences has increased again. More countries have started to produce films, film-making has been influenced. In particular, there are currently many national film industries. 1.What is NOT true about Louis and Auguste Lumiere? A. They made the world’s first film. B. Their film consisted of short, simple scenes. C. They were French brothers. D. They were very first film stars.

Viết đoạn văn (khoảng 7 – 10 dòng) tả những nết tốt của người bạn mà em thân nhất.

Viết đoạn văn ngắn nêu cảm nhận của em về nhân vật Vũ Nương(từ 5-7 câu) (Ko chép mạng) Mn giúp mk vs nha

Ổ cứng có phải là bộ nhớ không mọi người ?

1 a)729x - x^3=0 CỐ GẮNG NHA MÌNH VOTE 5*

Nhanh nkaaa mọi người>< NL : Box họa có ai vô đây khumm:)))

19. He said, “I will never speak to her again.” ………………………………………………………………………………………. 20. I said to the clerk clearly, “I must pay that bill. 21. “we didn’t see everything.” She said she said ………………………………………………………………………. 22.” “I don’t want anything else to eat”. He said He said................................................................................................................ 23. Sam said “I’m hungry because I didn’t have anything for lunch today.” Sam said............................................................................................................. 24. “ I can’t speak English well”. Minh said 25. Minh said...................................................................................................... 26. Mother: “Does anyone want some more potatoes?” Mother asked ………………………………………………………………………. 27. Father: “Pass me the wine, Beth.” ……………………………………………………………………………………………… 28. Beth: “The chicken is very nice.” ……………………………………………………………………………………………… 29. Grandfather: “I’m going to start my diet tomorrow.” ……………………………………………………………………………………………… 30. Grandmother: “Did you stay up late last week?, Sam!” ……………………………………………………………………………………………… 31. Tim: “This is the best dinner I’ve had!” ……………………………………………………………………………………………… 32. Jean: “Is there any more salad, Mum?” ……………………………………………………………………………………………… 33. Sam: “How long has your sister worked here.” ……………………………………………………………………………………………… 34. Helen: “What are we having for dessert, Mum?” ……………………………………………………………………………………………… 35. Bob: “When did you learn English?’’ …………………………………………………………………………. 36. “Why do you want the job?” She asked him ………………………………………………………………………….. 37. “How did you hear about it?” She asked him ………………………………………………………………………….. 38. “Are you fit?” She asked him ………………………………………………………………………….. 39. “Can you work on Saturdays?” She asked him ………………………………………………………………………….. ………………………………………………… C) Wh- questions: 1. He asked, “How long does it take you to have lunch?” ………………………………………………………………………. 2. He asked me, “What are you doing at the weekend?” ………………………………………………………………………. 3. She asked, “Why are you late, Tom?” ………………………………………………………………………. 4. My mother asked me, “Where is your umbrella?” ………………………………………………………………………. 5. The secretary asked the man, “Who do you want to see, sir?” ………………………………………………………………………. 6. The students asked, “What time does the bell ring?” ………………………………………………………………………. 7. He asked Tom, “What kind of films do you like watching?” ………………………………………………………………………. 8. The teacher asked the girl, “When do you have to be home?” ………………………………………………………………………. 9. They always asked, “Why don’t you let my cat in?” ………………………………………………………………………. 10. The passengers asked, “When did the last train leave?” ………………………………………………………………………. 11. He asked, “What will you do tomorrow, Jane?” ………………………………………………………………………. D) Yes / No questions: 1. She asked, “Do you live with your family, Helen?” ………………………………………………………………………….. 2. He asked, “Can I borrow your pen, Linda?” ………………………………………………………………………….. 3. He asked me, “Does your uncle live in England?” ………………………………………………………………………….. 4. Mary asked Lucy, “Will you come to my party tomorrow?” ………………………………………………………………………….. 5. Mark asked, “Did you phone me last night, John?” ………………………………………………………………………….. 6. He asked, “Is this yours or mine, David?” ………………………………………………………………………….. 7. She always asked me, “Must you always ask me what I’m doing?” ………………………………………………………………………….. 8. The teacher asked, “Are you listening to me?” ………………………………………………………………………….. 9. Mary asked, “Do you want me to help you, Larry?” ………………………………………………………………………….. 10. The officer asked, “Are you a foreigner? Can you spell your name?”