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quynhnhu27306
2 năm trước
Cho tam giác ABC cân tại A, có đường cao AH, Kẻ HE vuông góc AB, HF vuông góc AC. 1) chứng minh : HB^2/ HC^2 = EB/FC 2) Tính HE, AH. Biết AE=16cn và BE = 9 cm
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BÀI TẬP ÁP DỤNG Mark the letter A, B, C, or D on your answer sheet to indicate the option that best completes each of the fol¬lowing exchanges 11. Husha and Honish are talking about Trishie after watching her music performance. - Husha: “Trishie’s the best singer in our school.” - Honish: “………………………….” A. Yes, please. B. I couldn’t agree with you more. C. That’s OK! D. Yes, tell me about it. 12. Luca is at Noi Bai Airport. She wants to exchange some money, she is talking to Paula - a clerk at a currency exchange kiosk. - Luca: “I'd like to change some money.” Paula: “ ………………………………” A. Five tens, please B. Which currency? Loại tiền gì C. You haven't signed it. D. What's your account number? 13. Yuki and Hana are having a free afternoon. Yuki is inviting Hana to see a new movie with him. - Yuki: "Do you feel like going to the cinema this afternoon?" - Hana: “ ……………………………...” A. I don't agree. I'm afraid B. I feel very bored C. You're welcome D. That would be great 14. David is talking to Lucy about her painting. - David: “What a beautiful painting!” - Lucy: “____________” A. No problem B. It’s on the wall C. I’m glad you like it D. You’re welcome. 15. Peter and Dane are talking about environmental protection. - Peter: “We should limit the use of plastic bags.” - Dane: “____________. We can use paper bags instead.” A. I completely agree. B. It’s not true. C. I don’t quite agree D. You’re wrong. 16. David is apologising to his teacher for being late. - David: “Sorry I’m late! The traffic is so heavy.” - Teacher: “____________. Come in and sit down.” A. You’re so kind B. It’s alright C. Me neither D. Thank you 17. Peter and Mary are talking about social networks. - Peter: “Using social networks may have negative effects on students.” - Mary: “____________. It distracts them from their studies.” A. I’m not sure about that B. I don’t quite agree C. You’re wrong D. That’s quite true 18. Linda and Peter are talking about safe driving. - Linda: “I think drink-driving should be severely punished.” - Peter: “____________. It may cause accidents or even deaths.” A. You must be kidding B. I don’t think so C. I don’t understand what you mean D. I absolutely agree with you 19. A porter is talking to Mary in the hotel lobby. - Porter: “May I help you with your suitcase?” - Mary: “____________” A. What a shame B. Me too C. You’re welcome D. Yes, please 20. John is having dinner at Linda’s house. - John: “This roast beef is so delicious.” - Linda:”____________” A. sure. I’d love to B. I’m glad you like it. C. No, don’t worry. D. I don’t either.

ai giúp mình bài này với ak Multiple choice: 1. If I __________the same problem you had as a child, I might not have succeeded in life as well as you have. A. have B. would have C. had had D. should have 2. I __________you sooner had someone told me you were in the hospital. A. would have visited B. visited C. had visited D. visit 3. __________more help, I would call my neighbor. A. needed B. should I need C. I have needed D. I should need 4. __________then what I know yesterday, I would have saved myself a lot of time and trouble over the years. A. had I known B. did I know C. If I know D. If I would know 5. Do you think there would be less conflict in the world if all people __________the same language? A. spoke B. speak C. had spoken D. will speak 6. If you can give me one good reason for your acting like this, __________this incident again. A. I will never mention B. I never mention C. will I never mention D. I don't mention 7. If I had known you were asleep, I __________so much noise when I came in. A. didn't make B. wouldn't have made C. won't make D. don't make 8. Unless you __________all of my questions, I can't do anything to help you. A. answered B. answer C. would answer D. are answering 9. Had you told me that this was going to happen, I __________it. A. would have never believed B. don't believe C. hadn't believed D. can't believe 10. If Jake __________to go on the trip, would you have gone? A. doesn't agree B. didn't agree C. hadn't agreed D. wouldn't agree 11. J: "John went to the hospital alone" K: "If __________, I would have gone with him". A. had he told me B. he had told me C. he has told me D. he would tell me 12. If you __________, I would have brought my friends over to your house yesterday to watch T.V, but I didn't want to bother you. A. had studied B. studied C. hadn't studied D. didn't study 13. Peter: "Did you need help with your Math last night?". Mary: "If I had needed, I __________you". A. would call B. called C. would have called D. will call 14. If someone __________ in to the store, smile and say, "May I help you?" A. comes B. came C. come D. should come 15. "Here's my phone number". "Thanks. I'll give you a call if I __________some help tomorrow" A. will need B. need C. would need D. needed

BÀI TẬP ÁP DỤNG Mark the letter A, B, C, or D on your answer sheet to indicate the option that best completes each of the fol¬lowing exchanges. 36. Mrs Smith and her students are visiting the zoo. - Mike: “Can I feed the gorilla, Mrs Smith?” - Mrs Smith: “____________. The sign says ‘No feeding the animals’.” A. Of course you can B. I don’t think it works C. I’m sure about that D. I’m afraid not 37. Andrew is talking to a waiter in a restaurant. - Andrew: “Can I have the bill, please?” - Waiter: “____________” A. You are very kind B. Just a minute, please C. My pleasure D. You’re exactly right 38. Silas is talking to his roommate, Salah, about the Olympic Games. - Silas: “Do you think our country can host the Olympic Games some day in the future? - Salah:”____________. We can’t afford such a big event.” A. You can say that again B. I can’t agree with you more C. Yes, you’re right D. No, I don’t think so 39. Laura is telling Bob about her exam results. - Laura: “____________” - Bob: “That’s great. Congratulations!” A. I hope I’ll pass the exam tomorrow. B. I’ve passed the exam with an A. C. I’ll get the exam results tomorrow. D. I didn’t do well in the exam. 40. Nancy and James are talking about their school days. - Nancy: “I think school days are the best time of our lives.” - James: “____________. We had sweet memories together then.” A. I’m afraid so B. Absolutely. C. That’s nonsense D. I doubt it 41. John and Mike are talking about Mike’s new car. - John: “____________” - Mike: “Thanks. I’m glad to hear that.” A. Where did you buy your car? B. What a nice car! C. Your car is new, isn’t it? D. My car is very expensive. 42. Two students are talking about the school curriculum. - Ted: “Swimming should be made part of the school curriculum.” - Kate: “____________. It is an essential life skill.” A. Oh, that’s a problem. B. I can’t agree with you more. C. Not at all D. You can make it. 43. Jane is talking to Mike, who has just helped her with her luggage. - Jane: “____________” - Mike: “It’s my pleasure. A. It’s too heavy. B. It’s not my duty. C. Thanks a lot, indeed. D. Welcome back. 44. Adam and Janet are at the school canteen. - Adam: “____________” - Janet: “Yes, please.” A. Do you mind if I sit here? B. Can you pass me the salt, please? C. It’s a bit hot in here, isn’t it? D. Would you like a cup of coffee? 45. Jenny and Jimmy are talking about university education. - Jenny: “I think having a university degree is the only way to succeed in life.” - Jimmy: “____________. There are successful people without a degree.” A. That’s life B. That’s all right C. I don’t quite agree D. I can’t agree more 46. John was in Hanoi and wanted to send a parcel to his parents. He asked a local passer- by the way to the post-office. - John: “Can you show me the way to the nearest post office, please?” - Passer-by: “____________” A. Not way, sorry. B. Just round the corner over there. C. Look it up in a dictionary! D. There’s no traffic near here. 47. Lora has just bought a new skirt that she likes very much. - Jane: “You look great in that red skirt, Lora!” - Lora: “____________” A. No, I don’t think so. B. Oh, you don’t like it, do you? C. Thanks, I bought it at Macy’s. D. Thanks, my mum bought it. 48. John and Mary are talking about what to do after class. - John: “____________- Mary: “Yes, I’d love to.” A. Do you often have time for a drink after class? B. Would you like to have a drink after class? C. Do you often go out for a drink after class? D. Would you like tea or coffee after class? 49. Paul and Daisy are discussing life in the future. - Paul: “I believe space travel will become more affordable for many people in the future.” - Daisy: “____________ .” A. It doesn’t matter at all. B. There’s no doubt about that. C. It is very kind of you to say so. D. I am sorry to hear that. 50. Jack is inviting Mary to his party. - Jack: “Would you like to come to my party this weekend?” - Mary: “____________.” A. Yes, I’d love to B. No, don’t worry C. You’re welcome D. I’m afraid so Question

ai giúp em bài này với ạ Put the verbs in to correct forms: 1. you (read) _________________the instructions carefully, you wouldn't have answered the wrong question. 2. If Mel (ask) _________________ her teacher, he'd have answered her questions. 3. I would repair the roof myself if I (have) _________________a long ladder. 4. Unless they turn that radio off, I (go) _________________mad. 5. If you were made redundant, what you (do) _________________? 6. We'll have a long way to walk if we (run) _________________out of petrol here. 7. If you shake that bottle of port, it (not be) _________________ fit to drink. 8. you (speak) louder, your classmates would understand _________________ you. 9. I'll probably get lost unless he (come) _________________with me. 10. You (not have) _________________ so many accidents if you drove more slowly. 11. you (wear) _________________ a false beard, nobody would have recognized you. 12. If she (leave) _________________ the fish here, the cat will eat it. 13. You (have) _________________ no trouble at school if you had done your homework. 14. Unless you (tell) __________________ the truth, I won't help you. 15. I would rather (help)______________________that old poor woman yesterday. 16. If I had known that you couldn't eat octopus, I (not buy) _________________ it. 17. If they (hang) _________________ that picture lower, people would be able to see it. 18. She (be) _________________able to walk faster if she didn't have such high-heel shoes. 19. I (bring) _________________ you some beer if I had known that you were thirsty. 20. If you had touched that electric cable, you (be) _________________ electrocuted.

BÀI TẬP ÁP DỤNG Mark the letter A, B, C, or D on your answer sheet to indicate the option that best completes each of the fol¬lowing exchanges. 21. Joana and David, two lectures, are talking about library skills. - Joana: “I think we should teach our students how to use the library.” - David:”____________ A. You’re absolutely wrong B. You must be kidding C. I couldn’t agree with you more D. That’s not a good idea 22. A shop assistant is talking to a customer. - Shop assistant: “Do you need anything else?” - Customer:”____________” A. That’s all. Thanks B. Good job! C. With pleasure D. You’re welcome 23. Ann and Peter are talking about housework. - Ann: “ I think children should be paid for doing the housework.” - Peter: “____________. It’s their duty in the family.” A. That’s what I think B. You’re exactly right C. There’s no doubt about it D. I don’t think so 24. Ken and Tom are high-school students. They are discussing where their study group will meet. - Ken: “Where is our study group going to meet next weekend?” - Tom: “____________.” A. Studying in a group is great fun. B. We are too busy on weekdays. C. Why don’t you look at the atlas? D. The library would be best. 25. Mike and Lane are university students. They are talking about Lane’s upcoming high-school reunion. - Mike: “So, you have your fifth high-school reunion coming up?” - Lane: “…………………….” A. Oh, the school reunion was wonderful. B. No. You’re in no mood for the event. C. The food at the reunion was excellent. D. Yeah. I’m really looking forward to it. 26. A waiter in a restaurant is talking to a customer who has just finished his meal there. - Waiter: “Here’s your bill, sir.” - Customer: “____________” A. Don’t mention it. B. Can I pay by credit card? C. What do you have? D. You’re welcome. 27. Two close friends Tom and Kyle are talking about Kyle’s upcoming birthday. - Tom: “Can I bring a friend to your birthday party?” - Kyle: “____________” A. It’s my honour. B. Let’s do it then. C. The more the merrier. D. That’s right. 28. Two friends Diana and Anne are talking about Anne’s new blouse. - Diana: “That blouse suits you perfectly, Anne.” - Anne: “____________’’. A. Never mind. B. Don’t mention it. C. Thank you. D. You’re welcome. 29. Mary is talking to a porter in the hotel lobby. - Porter: “Shall I help you with your suitcase?” - Mary: “____________” A. Not a chance. B. That’s very kind of you. C. I can’t agree more. D. What a pity! 30. Susan accidentally stepped on Denise’s foot. - Susan: “Oops! I’m sorry, Denise.” - Denise: “____________” A. You shouldn’t do that. B. It’s alright. C. You are welcome. D. It’s nonsense. 31. Hana and Jenifer are talking about a book they have just read. - Hana: “The book is really interesting and educational.” - Jenifer: “____________” A. I’d love it. B. That’s nice of you to say so. C. I couldn’t agree more. D. Don’t mention it. 32. Jolie and Tom are meeting at the supermarket. - Jolie: “Hi, Tom. How are you doing?” - Tom: “____________. How about you?” A. I’m waiting for my sister B. I’m shopping for food C. I’m doing nothing D. I’m doing well 33. Maria and Alex are talking about the environment. - Maria: “Our environment is getting more and more polluted. Do you think so?” - Alex: “____________. It’s really worrying.” A. I’ll think about that B. I don’t agree C. I don’t think so D. I can’t agree more 34. Liz is telling Andrew about her first novel. - Liz: “Guess what? My first novel has just been published.” - Andrew: “____________” A. It’s my pleasure. B. Congratulations! C. Better luck next time! D. It’s very kind of you. 35. Linda is thanking Daniel for his birthday present. - Linda: “Thanks for the book. I’ve been looking for it for months.” - Daniel: “____________” A. You can say that again B. Thank you for looking for it C. I like reading books D. I’m glad you like it

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