$\frac{a^{2}}{b^{2}}$ + $\frac{b^{2}}{a^{2}}$ + 4 $\geq$ 3( $\frac{a}{b}$ + $\frac{b}{a}$ ) Mình giải thế này được không ạ ? ($\frac{a}{b}$ + $\frac{b}{a})^{2}$ + 2 $\geq$ 3( $\frac{a}{b}$ + $\frac{b}{a}$ ) Do là ta có $\frac{a}{b}$ + $\frac{b}{a}$ $\geq$ 2 Nên ($\frac{a}{b}$ + $\frac{b}{a})^{2}$ + 2 - 3( $\frac{a}{b}$ + $\frac{b}{a}$ ) $\geq$ 0

III. Choose the best words or phrase (A,B,C or D) to complete the sentences (2.5.pts) 1. Hanoi is famous …………….its beauty. A . for B . about C . with D. by 2. Let’s go out and enjoy the sunshine, …………..? – That’s a good idea. A . will you B . don’t you C . won’t we D . shall we 3. He’s used…………… in heavy traffic everyday. A . drive B . to driving C . driving D . to drive 4. If the weather …………fine tomorrow, we’ll have a picnic. A . is B . were C . was D. will be 5. Walking is a good form of exercise for……….. young ………. old. A . neither / or B . either / nor C . both / and D . both / or 6. The New Year is celebrated ………..midnight …….. January 1st . A . in / on B . at / on C. at / in D . in /in 7. Can you …….. up the volume a little? I can’t hear it very clearly. A . play B . sing C . down D .turn 8. He is the man ……….. we wanted to find. A . who B . whose C . whom D . which 9.A “They suggest going to Sapa on the weekend.” B “………………………….” A . That’s a fine day B . That’s a good idea C . That’s a trip D . That’s a reason 10. ………… Mai is very tired, she has to finish her homework before she goes to bed. A. Eventhough B. So C. However D.Therefore IV. Read the following passage, then choose the correct answer (1.5pt) Jeans are very popular with (1)________people all over the world. Some people say that jeans are the “uniform” of youth. But they haven’t always been popular. The story of jeans (2)____almost two hundred years ago. People in Genoa, Italy made pants. The cloth made in genoa was (3)________“jeanos”. The pants were called “jeans”. In 1850, a saleman in California began selling pants made of canvas. His name was Levi Strauss. Because they were so strong, “Levi’s pants” became (4)________with gold miners, farmers and cowboys. Six years later Levis began making his pants with blue cotton cloth called denim. Soon after, factory (5)_______in the US and Europe began wearing jeans. Young people usually didn’t (6)_______ them. 1. A. rich B. old C. young D. poor 2. A. start B. starts C. was starting D. started 3. A. called B. calls C. calling D. call 4. A. famous B. popular C. good D. wonderful 5. A. workers B. drivers C. cowboys D. Farmers 6. A.wearing B. wears C. wear D. wore

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1. Only after she _______ from a severe illness did she realize the importance of goodhealth. A. would recover B. has recovered C. had recovered D. was recovering 2. The children _______ to bed before their parents came home from work. A. were all going B. had all gone C. had all been going D. have all gone 3. Paul noticed a job advertisement while he _______ along the street. A. was walking B. would walk C. walked D. had walked 4. I haven’t met him again since we _______ school ten years ago. A. have left B. leave C. left D. had left 5. Mr Pike _______ for this company for more than thirty years, and he intends to stayhere until he _______. A. worked/retires B. works/is retiring C. has worked/retires D. is working/will retire 6. When he _______ us to go in, we _______ outside the exam room for over half an hour. A. let - are standing B. let - have stood C. let - had been standing D. let - have been standing 7. When I _______ her, I _______ her your regards. A. met/was sending B. meet/will send C. met/had sent D. meet/sent 8. When we enter the room, our boss _______ for us here. A. will wait B. will be waiting C. was waiting D. will be waited 9. When I got home I found that water _______ down the kitchen walls. A. ran B. was running C. has run D. had been running 10. Mike _______ his favorite program on TV when the lights went out. A. was watching B. is watching C. watched D. watches 11. When the first child was born, they _______ for three years. A. have been married B. had been married C. will been married D. will have been married 12. We _______ in silence when he suddenly _______ me to help him. A. walked - was asking B. were walking - asked C. were walking - was asking D. walked - asked 13. By the time the software _______ on sale next month, the company _______ $2 millionon developing it. A. went - had spent B. will go - has spent C. has gone - will spend D. goes - will have spent 14. When Carol _______ last night, I _______ my favorite show on television. A. called / was watching B. had called / watched C. called / have watched D. was calling / watched 15. I'll call you as soon as I _______ in Paris. A. will arrive B. am arriving C. arrive D. will have arrived 16. Many of the people who attended Major Gordon’s funeral _______ him for manyyears. A. didn't see B. wouldn't see C. haven’t seen D. hadn’t seen 17. Jane _______ her homework when her friend asked her to do his as well. A. did B. would do C. was doing D. had done 18. Mr. Pike _______ English at our school for 20 years before he retired last year. A. was teaching B. had been teaching C. is teaching D. has been teaching 19. When I return to my hometown, everything _______ a lot. A. changes B. will be changing C. will have changed D. will change 20. My parents have left for English since I _______ at primary school. A. have been B. was C. had been D. am 21. Iwas angry when you saw me because I _______ with my sister. A. have been arguing B. had been arguing C. argued D. would argue 22. By the time I finish the final term exams, I _______ my first two years' study at university. A. have completed B. will be completed C. will complete D. will have completed 23. Iwanted to say goodbye to Jerry, but he _______ when I arrived. A. was already left B. already left C. had already been leaving D. had already left 24. Isaw a terrible accident while I _______ on the beach. A. am walking B. walked C. was walking D. had walked 25. When we see Mr. Minh tomorrow, I _______ him of that. A. will remind B. remind C. have reminded D. reminded 26. As soon as I _______ a good look at the designs, I _______ them back to you. A. have had/ sent B. have had/ will send C. have/ send D. will have/ send 27. His English has improved a lot since he _______ an English course by Mr. John. A. was taking B. takes C. took D. will take 28. We’ll be able to leave for the airport as soon as the taxi _______. A. arrived B. will arrive C. arrive D. arrives 29. Tom often watches TV after his parents _______ to bed. A. had gone B. have gone C. go D. went 30. When I last saw him, he _______ in London. A. is living B. has been living C. was living D. lived 31. By the time he arrives here tomorrow, they _______ for London.

21. “Could I have a morning paper tomorrow?” _ “ _______________________”. A. I like reading newspapers in the morning too. B. I am not sure if I can b here tomorrow. C. Yes, please. D. Certainly, it will be delivered directly to your room.

Mọi người vẽ tranh về đt VN đi dự đoán tỉ số tối nay lun

Nữa mn, vt lại câu 1. I have never known a dancer as talented as Helena (far) 2. Doubtlessly, Katie is the best violinist in the conservatory (no one) 3. Right after disembarkation from the plane, he was taken into custody (got)

Dùng thì HTĐ hoặc HTTD 1.We (go)........to supermarket to buy some food 2.Who you (wait)......for, Nam ? No, I (wait)..... for Mr. Hai 3.My teacher(tell)......Hoa about Math 4.Today, we (have).... english class 5.Hoa (live).........in Ha Noi ,and Ha (live)....... in HCM City. 6.My teacher (tell).... Hoa about Math 7.How .....your sister (go)..... to school

Write a paragraph about a memorable birthday celebration. Use as many countable / uncountable nouns as possible.

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