M = x^2 – 2xy + y^2; N = y^2 + 2xy + x^2 + 1. Làm bẵng latex nhé

a)√(7+√2)=3+√5 b) √(x^2-6x+9)= √(4+2√3) tìm cả điều kiện

Câu 2 (1,5 điểm): Hòa tan Bao vào nước thu được dung dịch làm phenolphtalein chuyển thành màu hồng. Giải | thích và viết phương trình hóa học. Câu 3 (2,5 điểm): Chọn hóa chất thích hợp và viết phương trình hóa học để loại các khí SO2 và CO2 ra khỏi hỗn hợp với khí có.

Mong được mọi người giúp đỡ Exercise 4. Combine each pair of sentences into one sentence using Gerund 1. Alice made a mistake in her homework. She remembered it.  Alice remembered……………………………………………………………………………………… 2. Tom asked me to remind him to buy a new shirt. I forgot it.  I forgot ………………………………………………….……………………………………………… 3. Mr Pike taught John several years ago. He doesn’t remember it.  Mr Pike doesn’t remember……………………………………………………………………………… 4. This work must be done before we go home. We mustn’t forget.  We mustn’t forget……………………………………………………………………………………… 5. Peter lived in this city when he was a boy. He doesn’t remember it.  Peter doesn’t remember………………………………………………………………………………………… Exercise 5. Rewrite the following sentences using Gerund: 1. A good way of keeping fit is to swim everyday.  Swimming………………………………………………………………………………………… 2. It takes a long time to learn a foreign language.  We spend………………………………………………………………………………………… 3. It is not easy to change money here on a Sunday.  Changing………………………………………………………………………………………… 4. It is impossible to park your car during office hours.  Parking…………………………………………………………………………………………………… Correct mistakes 1. My parents made me to promise to write them once a week. ...................................... 2. I don’t mind to have a roommate. ...................................... 3. Most students want return home as soon as possible...................................... 4. When I went to shopping last Saturday, I saw a man to drive his car onto the sidewalk. ............... 5. I asked my roommate to let me to use his shoe polish. ...................................... 6. To learn about another country it is very interesting. ...................................... 7. I don’t enjoy to play card games. ...................................... 8. I had my friend to lend me his car. ...................................... 9. I tried very hard to don’t make any mistakes. ...................................... 10. Some people prefer to save their money to spend it. ...................................... 11. The task of find a person who could help us wasn’t difficult. ...................................... 12. All of us needed to went to the cashier’s window. ...................................... 13. I am looking forward to go to swim in the ocean. ...................................... 14. Please promise not telling anybody about my secret. ...................................... 15. Lillian deserves to be tell the truth about what happened last night. ...................................... 16. Barbara makes me laughing. She has a great sense of humor................................... Exercise 6. Rewrite the following sentences using the words in the blanket. 1. the police forced everyone to leave the building. The police made …………………………………………………………………………… 2. The driver allowed the old man to travel on the bus without a ticket. The driver let 3. Jack forced his younger brother to wash the dishes. Jack made 4. I don’t allow people to smoke in my house or in my car. I don’t let 5. A car ran down hill. Tom saw 6. Your sister wore your hat. I saw 7. Did Tam do something suspicious? Did you notice 8. Tom’s sister died of AIDS. I heard 9. Your sister shouted “Fire!” I heard her. I heard 10. Tom prepared the sandwiches. Diana watched him. Diana watch 11. Brian left early. Did you see him? Did you 12. A car came around the corner. Tom saw it. Tom saw 13. Something crawled up to my arm. I felt it. I felt 14. john painted the window. I watched him. I watched Exercise 7. Choose the best answer A, B, C or D: 1. The new students hope ……………in many of the school’s social activities. a. including b. being included c. to include d. to be included 2. Paul didn’t mind ……………….by his fortieth birthday party held by his friends. a. surprising b. being surprising c. to surprise d. to be surprised 3. I finally finished……………..at 7.00 p.m and served dinner. a. to cook b. to be cooked c. cooking d. being cooked 4. Although younger than the other children, she demanded………….….in the game. a. to include b. to be included c. including d. being including 5. The driver was so tired of ………... the same route every day that he asked for a transfer. a. to drive b. being driven c. driving d. drive 6. Ms Brown expects ………………..about any revisions to her story before it is printed. a. consulting b. being consulted c. to consult d. to be consulted

Các bn ơi làm hộ mik đề Văn vs đoạn văn ngắn về bài cảnh khuya

III. Write one word in each gap. 48. It was Lia’s first job as a model and she was quite anxious ……………………… it. 49. Bill seems ……………………… have had his hair done differently. 50. I couldn’t help staring ……………………… the man in the restaurant who was wearing a kilt. 51. Before starting my design, I referred ……………………… some books of past designs to give me inspiration. 52. Plenty ……………………… fashion designers have been successful in spite of not having any formal training in fashion. 53. I asked the shop assistant to advise me ……………………… my choice of shoe. 54. Many fashion journalists criticized the actress ……………………… arriving at the Oscars in a second-hand dress. 55. The supermodel insisted ……………………… having a star on her dressing room door. 56. These days, most designers use a computer ……………………… visualize their designs before they make any clothes. 57. Visiting fashion shows can be quite useful ……………………… picking up new ideas. IV. Write one word in each gap. DOES WHAT WE WEAR MATTER? In spite of there (58) ……………………..…….. some truth in the expression “Never judge a book by its cover”, which reminds us that appearances can be deceptive, there (59) ……………………..…….. to be far more truth in the expression “You never get a second chance to make a first impression”. There are plenty (60) ……………………..…….. examples of people who have insisted (61) ……………………..…….. expressing their individuality through their clothing and have suffered for it. If you are going to wear outrageous clothes, you’ve got to be prepared (62) ……………………..…….. the reaction of others. That reaction may not be positive. You may be stared (63) ……………………..…….., criticized (64) ……………………..…….. wearing something unusual, or even insulted. On the other hand, you may be complimented (65) ……………………..…….. your style. Location and situation are very important. At a job interview, for (66) ……………………..…….. you should probably be more anxious (67) ……………………..…….. please your potential employers than interested in showing off the latest fashions.

Exercise 1:Choose the word or phrase that complete the sentence (A, B, C, or D) 1. He ____ for London one year ago. A. left B. has left C. leaves D. had left 2. I ____ never ____ this game before. A. ’ve/played B. I played C. was/ playing D. play 3. What ____ you ____, Nam? – I’m thinking of my mother. A. do/think B. are/thinking C. have/thought D. were/thinking 4. I usually ____ to school by bus. A. went B. am going C. go D. have gone 5. Yesterday morning I ____ up at 6.30. A. got B. get C. was getting D. had got 6. ____ an email before? A. Have you ever sent C. Did you ever send B. Have you been sending D. Do you send 7. Please don’t make so much noise. I ____. A. studying B. study C. am studying D. studied 8. It’s the first time ____ our flat, isn’t it? A. you’ve visit B. you visited C. you visit D. you’ve visited 9. This house ____ 35,000 pounds in 1980. A. costs B. cost C. had cost D. was cost 10. Mike is playing chess. How long ____ he ____? A. did/play B. is/playing C. has/play D. has/been playing 11. While they ____ chess, we ____ the shopping. A. playing/doing B. were playing/doing C. played/did D. were playing/were doing 12. They ____ football when the lights in the stadium ____ out. A. were playing/went B. played/was going C. were playing/ was going D. playing/went 13. Today is Thursday and she ____ late twice this week. She ____ late yesterday and on Monday. A. has been/had been B. has been/is C. has been/was D. is/was 14. ____ here since 2005? A. Did you live B. Have you live C. Have you lived D. Do you live 15. We ____ him since he ____ married. A. didn’t see/got B. haven’t seen/got C. don’t/get D. hadn’t seen/got 16. I ____ how to dance when I ____ six years old. A. don’t know / was B. didn’t know / am C. didn’t know / was D. haven’t known/was 17. Last month my brother ____ me his photos. He ____ me his photos every year. A. sends/sent B. sent/sends C. sent/sent D. sends/sends 18. Nam is a careful driver but yesterday he ____ carelessly. A. drove B. had driven C. drives D. was driving 19. Do you like swimming, Ba? – I ____ when I was a child but not now. A. do B. did C. have done D. had done 20. They____ the baby a name yet. A. haven’t given B. hasn’t given C. gave D. have been giving 21. The child________ before the doctor arrived. a. died b. had died c. has died d. was dying 22. We cleaned up the room as soon as the guests________ a. had left b. has left c. left d. were leaving 23. The secretary________ the report by 10:00 yesterday. a. hasn't finished b. hasn't finished c. didn't finish d. would finish 24. Jane's eyes are red. She________ a. cried b. has cried c. has been crying d. had cried 25. This room is dirty. Someone________ in here. a. smoked b. has smoked c. had been smoking d. has been smoking 26. Arsenal________ next Monday. a. wins b. will win c. would win d. is winning 27. it________ rain tomorrow. a. rains b. will rain c. is going to rain d. is raining 28. I'll come and see you before I ________ for America. a. leave b. will leave c. have left d. shall leave 29. The little girl asked what________ to her friend. a. has happened b. happened c. had happened d. would have been happened 30. John________ a book when I saw him. a. is reading b. read c. was reading d. reading 31. He said he________ return later. a. will b. would c. can d. would be' 32. Jack________ he door. a. has just opened b. open c. will have opened d. opening 33. I have been waiting for you________ a. since early morning b. since 9 a.m c. for two hours d. all are correct 34. My sister________ for you since yesterday. a. is looking b. was looking c. has been looking d. looked 35. Jack________ the door. a. has just painted b. paint c. will have painted d. painting 36. The train________ half an hour ago. a. has been leaving b. left c. has left d. had left 37. We________ Doris since last Sunday. a. don't see b. haven't seen c. didn't see d. hadn't seen 38. When I last saw him, he________ in London. a. has lived b. is living c. was living d. has been living 39. She is tired now. She________ for a long time. a. has been learning b. has learned c. learns d. learned 40. They will have gone home before you________ to meet them. a. came b. come c. will come d. are coming

Ex 5: Complete the following sentences using “to V”, “V”, “V-ing” 6. I have a lot of homework ( do) ................... tonight, so I cannot go out with you. 7. We were hungry, so I suggested …………………………(have) dinner early. 8. I’m not in a hurry. I don’t mind ………………………..(wait). 9. It is really interesting ( read) ................... these books. 10. I saw the plane (crash) ................... into the hill and (burst) ................... into flames. 11. She is busy with …………………..(take) care of her baby. 12. They’re looking forward to……………………(see) their old classmates again. 13. They decided ( not/ go) ................... to the park as it was raining hard 14. I want you ( tell) ................... me the whole truth. 15. I don’t enjoy …………………….(drive) very much. 16. I felt the house (shake) ................... with the explosion, 17. I expect……………………..(pass) all exams with good marks. 18. I was too tired ( do) ................... any more work. Exercise 6:Identify one mistake in each sentence and correct it. 1. He found it hard repair the computer. 2. How can you let such a silly incident wrecking your friendship? 3. I couldn’t help being laughed when he told me that story. 4. She has tried to wear three dresses and the blue one was the best. 5. It cost me a lot but I don’t regret spend money on it. 6. Her teacher suggested them taking a trip to Huong pagoda. 7. Remember check your answer before handing in your exam paper. 8. He doesn’t like being pick up at school by his mother. 9. They prevented the customers from leave the shop. 10. It’s no use to persuade him. He has made up his mind. E11 GERUND, PERFECT GERUND, PASSIVE, PASSIVE INFINITIVE, PASSIVE GERUND 1. I don’t enjoy (laugh) ................. at by other people. 2. I want ( see) ...................... the house where our president was born 3. You must tell me the truth. I insist on ( tell) ................ the truth. 4. I can’t stand ( work) .................... with such a rude man. 5. It is easy ( fool) .................... by his lies. 6. Don’t all of us want (love) ............... and (need) ................ by other people? 7. Susan considers ( look) .................... for another job. 8. Sometimes adolescents complains about not (understand) .................... by their parents. 9. Your compositions are supposed ( write) .............. in ink. 10.Tracy promised ( help) .................... Owen with his packing. 11. Ms. Thompson is always willing to help if there is a problem in the office, but she doesn’t want ( call) ................. at home unless there is an emergency. 12. Jack Wells has a good chance of (elect) ................... I know I am going to vote for him. 13. What a mess! This room needs ( clean) ................... up. We need ( clean) ....................... it up before the company arrives. 14. Alice didn’t expect ( ask) ......................... to Bill party. 15. If you eahr any news, I want (tell) ................. immediately. 16. I don’t like ( force) .................... to leave the room to study when my roommates feel like having a party. 17. My children enjoy ( allow) ................... to stay up late when there’s something special on TV. 18. Jane is looking forward to ( see) ....................... her boyfriend again 19. John admitted (surprise) ................ by the unexpected birthday party last night. 20. The witness to the murder asked not ( identify) ..................... in the newspaper. 21. Will you help me ( cut) .................. the grass today? 22. . Martha doesn’t like t have her picture taken. She avoids ( photograph) ......................... 23. This letter needs ( send) ........................ immediately. 24. The company seems ( make) ..................... good progress this year Exercise 2: Rewrite each sentences using passive gerund or passive infinitive 1. I don’t like people shouting at me. ............................................................ ....................................... 2. I hate people staring at me. .................................................................................................. 3. We need to redecorate the living room. .................................................................................................. 4. Someone may recognize her. She is wearing glasses to avoid that.......................................................... 5. People criticize him, but he doesn’t mind that. ........................................................................................... 6. People ask her about her past, she hates that. ............................................................................................. Mọi người giúp mik vs

Giá niêm yết của tivi loại A và máy giặt M có tổng tiền là 25,4 triệu đồng, nhưng trong đợt này tivi loại A giảm 40% và máy giặt M giảm 25% nên bác Hoàng đã mua một chiếc tivi và một chiếc máy giặt vs tổng số tiền 16,77 triệu. Tính giá niêm yết của tivi loại A

I. Complete the sentences by changing the form of the word in capitals when this is necessary 29. There’s a ……………………………… (SIMILAR) between the fashions of the 1980s and the 1960s. 30. I think you should lower your …………………………… (EXPECT) a little; it’s not easy to become a supermodel, you know. 31. Fashion critics have greeted the new clothing line with …………………………………. (ENTHUSE). 32. The factory has increased …………………………………. (PRODUCE) of its shoes in an attempt to keep up with demand. 33. All our clothes are designed for men and women …………………………………. (LIKE). 34. This designer’s clothes are really quite …………………………………. (LIKE) anything I’ve ever seen before. 35. His clothes are very …………………….. (DESIRE) and they sell for thousands of dollars. 36. I couldn’t decide which hat to get, but then again I’ve always been quite …………………….. (DECIDE) 37. I’m afraid I’m completely …………………………………. (USE) when it comes to making my own clothes. 38. I don’t …………………………………. (LIKE) this season’s fashion - I just don’t think it suits me personally, that’s all. 39. These dresses are …………………………………. (BEAUTY) made - just feel the quality! 40. I’m still …………………………………. (DECIDE) about whether to go to the fashion show next week or not. Choose the correct answer 41. Could you wipe the table with a damp ……………, please? A. clothe B. clothing C. cloth D. clothes 42. I’ve decided to……………my hair green for the party! A. dye B. paint C. sketch D. draw 43. That top doesn’t…………… me; it’s just not my style. A. fit B. suit C. match D. go with 44. That’s the most incredible …………… of art I’ve ever seen! A. job B. creation C. brand D. work 45. Jeans and T-shirts will never go out of …………… A. trend B. image C. fashion D. tendency 46. I need a funny …………… for the fancy-dress party. Any ideas? A. dress B. uniform C. suit D. costume 47. Tim forgot to use clothes …………… and all his clean clothes fell off the line into the mud! A. pegs B. clips C. hooks D. pins