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tquanghuy945
2 năm trước
Phải thay đổi chiều dài của một con lắc đơn ra sao để chu kì dao động của nó a. Tăng gấp đôi b. Tăng thêm 7/9 chu kì ban đầu? c. Giảm bớt 7/16 chu kì ban đầu?
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III- Choose the best answer from A, B, C or D 1. If you want to keep a pet you must be ready to look............for several years. A. at B. for C. over D. after 2.They have considered all the fifty applications; _______ seems suitable for the position. A. none of them B. none of whom C. none of these D. none of which 3. My cousin's main...........for going abroad was his poor health. A. need B. reason C. cause D. desire 4. You can buy an iron at any............shop. A. electric B. electrifying C. electrician D. electrical 5. Earnest Hemingway is one of my............ American writers. A. best B. favourite C. ideal D. most popular 6. My neighbor made...............noise last night that I couldn't get to sleep. A. so many B. so much C. such D. so 7. ................ the gold medal he'll have to do better than that. A. winning B. in order to win C. to win D. so that he wins 8. Give me a word................ with S. A. beginning B. begins C. began D. begin 9. Can you tell me the................. of these shoes? A. charge B. price C. amount D. expense 10. The cat was afraid when it saw its..........in the mirror. A. reflection B. look C. sight D. picture 11. One way to stop tooth decay is.............less sugar. A. to eat B. for eating C. you eat D. you are eating 12. In recent years, more and more_______ for things with credit card. A. pay B. paid C. are paying D. have been paying 13. Take this road and you will_______ at the hotel in five minutes. A. come B. arrive C. reach D. get 14. By the time Jack arrived to help, we_______ moving everything. A. would finish B. had finished C. finished D. would have finished 15._______ the phone rang later that night did I remember the appointment. A. No sooner B. Not until C. Only D. Just before 16. As soon as I graduate, I_______ to my hometown to work. A. return B. will return C. will have returned D. am going to return 17. “What kind of job would you like?” - “_______” . A. Is there a good chance of promotion? B. I’m good at computing C. Anytime after next week D. Anything to do with computers 18. While politicians argue about nuclear weapons, ordinary people are simply concerned_______ staying alive. A. of B. with C. for D. about 19. If I come and see the film with you on Saturday, I_______ it six times. A. will see B. will be seeing C. have seen D. will have seen 20. Diseased cells must be killed while their neighbors are left_______. A. unharmed B. harmful C. harmless D. harmfully IV- Put the correct form of the words: 1. Joanne wants to become a __________ in the future. (science) 2. Many rural areas in Viet Nam have been __________ in the last few years. (urban) 3. The book was so ________ that we didn’t want to read it. (interest) 4. There are a lot of _______________ in the competition. (contest) 5. Linda’s __________ made the party less exciting. (absent) 6. He didn’t win the championship, so he felt very _____________ . (hope) 7. Because of his _________, they failed the exam. (lazy) 8. Vinamilk company has served customers a lot of _____________ recently. (produce) 9. Tet holiday is one of the most important __________ for Vietnamese people. (celebrate) 10. Laura loves all of Vietnamese dishes, _______________ Nem. (special) V. Read the text and choose the best anwers to the following questions When I injured my back I had to take a break from my running career. I decided to introduce more women to the sport to show them how much fun it can be and to give them confidence to get out and run. I decided to start a running club for women in my area because I was annoyed by the attitude of many organizers. They complain about the lack of women in the sport but also use this as an excuse for not providing separate changing facilities. I put up poster and 40 women , young and old fit or unfit joined. All of these were attracted by the ideas of losing weight but I don't think they had really thought about running before. When or if they did, they had a picture of painful training. They didn't think of chatting and smiling while running in beautiful places, like by a tree. At first they ran for only a minute now they can run for thirty minutes. They've also learned from other runners about diet and keeping fit in general. I wanted to do something for women's running and I've had so much pleasure watching their progress- almost as much as they've had themselves. 1. What is the writer's main aim in writing the text? A. to describe her own running career B. to complain about race organizers C. to talk about women runners D. to describe good running method 2. what would a reader find out from the text? A. The best kinds of places for running B. How runner can avoid injuring themselves. D. The teaching skills of the writer C. the progress made by the women in the club.

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