Cho 0,1 lít dd hỗn hợp gồm H2SO4 0,05 M và HCl 0,1M trung hòa vừa đủ với V lít dd hỗn gồm NaOH 0,2M và Ba(OH)2 0,1M. a) Viết PTHH. b) Tính V (. Có cách nào k dùng định luật bảo toàn nguyen tố không ạ )

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17. You shouldn’t tell her the news. It might kill her. A. She shouldn’t be told by the news. She might be killed. B. The news shouldn’t be told her. She might be killed. C. She shouldn’t be told the news. She might be killed. D. She shouldn’t been told the news. It might be killed. 18. It wasn't obligatory to submit my assignment today. A. My assignment must have been submitted today. B. I needn't have submitted my assignment today. C. My assignment was required to submit by today. D. I mustn't submit my assignment today. 19. It's time we left for the disco. A. We may leave for the disco now. B. We needn't leave for the disco now. C. We should leave for the disco now. D. We must have left for the disco now. 20. It was a mistake of you to lose your passport. A. You shouldn't have lost your passport. B. There must be a mistake in your passport. C. You needn't have brought your passport. D. Your passport must be lost. 21. My car keys are possibly in the kitchen. A. My car keys should be put in the kitchen. B. My car keys cannot be in the kitchen. C. I don’t know whether my car keys are in the kitchen. D. My car keys might be in the kitchen. 22. Is it possible for me to come to your house at about 7pm? A. Must I come over to your house at about 7pm? B. Could I be coming to your house at about 7pm? C. Can I come to your house at about 7pm? D. Will I come to your house at about 7pm? 23. You must never take off your helmet while you are riding a motorcycle. A. If you are riding a motorcycle, you needn’t wear a helmet. B. When you are riding a motorcycle, wearing a helmet is not a must. C. You needn’t wear a helmet whenever you are riding a motorcycle D. Helmets must be worn at all times when you are riding a motorcycle 24. I have done this math problem at least twenty times, but my answer is wrong according to the answer key. A. The answer in the book should be wrong! B. The book needn't have a wrong answer. C. There is a wrong answer in the book. D. The answer in the book must be wrong! 25. Can you tell me directions for the station near here? A. Would you tell me where to get to the station near here? B. Could you tell me how to get to the station near here? C. Could you tell me what to get to the station near here? D. Must you tell me the way to get to the station near here? 26. A: John passed his exam with a distinction. B: _______. A. He was too lazy to succeed B. He can't have studied very hard C. He must have studied very hard D. He needs studying harder

Supply the correct form of the verbs in brackets 39. I wish it (not rain) ___________ heavily last Sunday. 40. You are driving too dangerously. I wish you (drive) ___________ slowly. 41. I wish the traffic (not make) ___________ so much noise everyday. 42. I haven’t written to Tom for so long. I wish I (know) ___________ his address. 43. I don’t have enough money to buy that book. I wish I (not, be) ___________ poor. 44. She wishes she (be) ___________ the most beautiful girl in Vietnam. 45. I wish I (not, spend) ___________ so much money. Rewrite the following sentences, beginning with the given words. 46. I’d love to be in a secluded beach in Mexico.  I wish ………………………………………………….. 47. Please don’t say things like that.  I wish ………………………………………………….. 48. I’m really sorry I didn’t invite her to the party.  I really wish ………………………………………………….. 49. I’m sorry I can’t help you do your homework.  I wish ………………………………………………….. 50. She doesn’t like to work with him.  She wishes ……………………………………………. 5. MODAL VERBS 1. Nancy was refused to be given a scholarship to study abroad two days ago. She could have been A B C very sad. D 2. There is no parking sign here so you would better take your car out of here now. A B C D 3. If you are free today, you will join our party at the club. A B C D 4. The company is going to held a party to celebrate the establishment . A B C D 5. The manager would dismiss his secretary if the secretary makes such stupid mistakes in the reports.

26. Susan regretted not buying that villa. A. Susan wished she had bought that villa. B. Susan wished she bought that villa. C. Susan wished she could buy that villa. D. Susan wished she hadn’t bought that villa. 27. It’s a pity that you didn’t tell us about this. A. I wish you told us about this. B. I wish you would tell us about this. C. I wish you had told us about this. D. I wish you have told us about this. 28. I’m afraid he won’t get over his illness. A. I wish he will get over his illness. B. I wish he would get over his illness. C. I wish he got over his illness. D. I wish he had got over his illness. 29. Peter regretted buying the secondhand computer. A. Peter didn’t want to buy the secondhand computer. B. Peter wished he didn’t buy the secondhand computer. C. Peter wished he hadn’t bought the secondhand computer. D. Peter was glad to buy the secondhand computer. 30. I regret that you didn’t give me a chance to tell you the truth. A. I wish you didn’t give me a chance to tell you the truth. B. I wish you gave me a chance to tell you the truth. C. I wish you had given me a chance to tell you the truth. D. I wish you hadn’t given me a chance to tell you the truth. Mark the letter A, B, C or D to show the underlined part that needs correction. 31. I sometimes wish that I will have another car. A B C D 32. I wishes you had been at the meeting yesterday. A B C D 33. I wish I didn’t say that to him yesterday. A B C D 34. She wishes that we didn’t send her the candy yesterday because she’s on a diet. A B C D 35. She wishes she could speak English as fluent as her sister. A B C D 36. I really wish we can make a trip around the world. A B C D 37. He got bad marks. He wishes he reviewed his lesson carefully. A B C D 38. I wish I didn’t speak to him so severely yesterday. A B C D