I. Multiple choice: Choose the correct word/ phrase to fill in the blank 1. I will look for another job ………………………………… my salary is increased. a. if b. when c. as d. unless 2. Why were you so ………………………………… when I saw you yesterday? a. friendless b. unfriendly c. friendly d. friendship 3. Cars and trucks are ………………………………… from driving in the city center. a. prohibited b. preserved c. leaked d. treasured 4. Bob doesn’t go to work today. He ……………………………… ill . a. may be b. maybe c. ought to be d. will be 5. They put garbage bins around the schoolyard to prevent lazy students ……… littering. a. with b. from c. for d. by 6. It rained ………………………………… for three days. a. continue b. continues c. continuing d. continuously 7. Don’t …………………………………. We have to keep our schoolyard clean and tidy. a. litter b. put trash c. waste d. reduce garbage 8. We are all slowly destroying the earth by ………………………………… our environment. a. setting b. minimizing c. polluting d. confining 9. This river is polluted: a lot of fish died and floated on the …………………………………. a. water line b. water front c. water surface d. water surfing 10. They took him for a French man because his French was so ………………………………. a. good b. well c. better d. bad 11. Instead of being excited about the good news, Tom looked ………………………………. a. different b. indifferent c. differently d. indifferently 12. There is no need ………………………………… you to shout. I can hear you. a. with b. to c. of d. for 13. If you aren’t going to live in the house, why ………………………………… you sell it? a. do b. don’t c. wouldn’t d. didn’t 14. I hope they ………………………………… be pleased when they saw the photographs. a. can b. could c. would d. should 15. These bags are made of……………………… You can use them to carry heavy things. a. paper b. silk c. plastic d. glass I1/ Guided Cloze Test Green Peace is an (1)___________________ environmental organization dedicated to preserving the earth’s natural (2)__________________ and its diverse plant and animal life. Green Peace was (3)______________in Vancouver, British Columbia, Canada, (4)____________ 1971 by members of the Don’t Make a Wave Committee, a small group (5)____________ was opposed to nuclear weapons testing by the United States military in Alaska. The group renamed itself Green Peace to reflect the broader goal of creating a green and (6)_________________ world. Green Peace has about 3 million (7)_________________ and more than 40 offices in 30 (8)______________. Its international headquarters are in Amsterdam, Netherlands. 16. a/ nation b/ national c/ international d/ internationally 17. a/ disasters b/ languages c/ dumps d/ resources 18. a/ found b/ founded c/ to found d/ founding 19 a/ on b/ in c/ from d/ since 20. a/ which b/ who c/ whom d/ whose 21. a/ disappointingb/ interesting c/ amazing d/ peaceful 22. a/ workers b/ members c/ conservationists d/ students 23. a/ schools b/ villages c/ countries d/ cities III/ Read the passage. Then write True (T) or False (F) for each sentence below: There is too much carbon dioxide in the air. When oil, gas, and coal burn, they create a large amount of carbon dioxide. We send five million tons of carbon dioxide into the atmosphere every year. This amount will double in fifty years. This carbon dioxide lets sunlight enter the Earth’s atmosphere and heat the Earth. However, it doesn’t let as much heat leave the atmosphere and enter space. It is like a blanket. The heat can pass from the sun through the blanket to warm the Earth. The heat stays there and cannot escape through the blanket again. Scientists call this the greenhouse effect. 24. When we burn oil, gas or coal, they give out carbon dioxide . ……………. 25. Every year about five million tons of carbon dioxide are sent into the atmosphere.……………. 26 This carbon dioxide heats the Earth. ……………. 27. The blanket keeps carbon dioxide inside it. …………….

2. Fill in each numbered blank with one suitable word Christmas is always held (54)________ December the twenty fifth every year. Every family in England decorates a Christmas tree and puts (55)________ in the middle of the living room. And Santa Claus plays an important (56)________ in this festival. There is a poem to relate him. In 1823, The patron Nicholas of children, Saint Nicholas appeared in a poem (57)________ A Visit Saint Nicholas. The character in the poem (58)________ a fat jolly man who wore a (59)________ suit and gave children (60)________ on Christmas Eve. The poem, which was (61)________ by Clement Clarke Moore, an American professor, became popular (62)________ the USA. Santa Claus is based (63)________ the description of Saint Nicholas in this poem.

tính diện tích hình tam giác AMC là 7cm vuông,MC là 3,5 cm , BM là 6 cm . Tính diện tích hình tam giác ABM giúp mk nha ai nhanh nhất cho 5 sao

Câu 1: Có 1 phân tử ADN nguyên phân 4 lần liên tiếp tạo ra số ADN con là A. 10 B. 64 C. 48 D. 16 Câu 2: Một đoạn phân tử ADN có trình tự một mạch như sau: -A-T-G-X-T-X-G- A. - T - A - G - T - X - G - A - B. - T - A - X - G - A - G - X - C. - T - G - A - T - X - X - A - D. - T- G - A - G - X - G - A -

Có 10 đội bóng tham gia một giải bóng đá. Mỗi đội phải đá lượt đi và lượt về với từng đội khác. Mỗi đội phải đá bao nhiêu trận trong suốt giải ?

12. The magazine “ Tour of Sai Gon” is fully……..Are you pleased with another one?. A. booked B. subscribed C. settled D. placed 13. A burglar is someone who…….. A. designs building B. steals from the shop C. buys something from a shop D. breaks into a house to steal things 14. Your EMS mail will be……in the shortest possible time A. provided B. delivered C. taken D. caught 15. The Messenger Call Service helps us to…..the recipient of the time and place to receive the call. A. witness B. require C. notify D. declare 16. The staff in many post offices in our city are very…..to the customers, so I like their service. A. impolite B. courteous C. rude D. outdated 17. I need to _________£1,000 to my daughter's account. A. transfer B. transform C. transmit D. transact 18. The _________service will help to send a document with its original shape. A. express B. transfer C. facsimile D. delivery 19. Dinosaurs became……millions of years ago. A. disappear B. extinct C. lost D. endangered 20. Many animals are……for their fur and other valuable parts of their bodies. A. hunted B. chased C. run after D. followed 21. In every country national……have been established to protect endangered animals. A. forests B. parks C. museums D. fields 22. It is…..that only about 1,000 pandas remain in the world. A. valued B. counted C. estimated D. calculated 23. If people stop destroying animal's natural habitat, more species will survive and produce ____. A. offspring B. ecology C. landscape D. benefit 24. Because of people’s_______with the environment, many kinds of plants and animals are becoming rare A. supply B. survival C. influence D. interference 25. The government _________ the flood victims with food, clothers and money. A. gave B. provided C. offered D. presented VII. Tenses 26. When I last saw him, he _____ in London. A. has lived B. is living C. was living D. has been living 3 27. We _______ Dorothy since last Saturday. A. don’t see B. haven’t seen C. didn’t see D. hadn’t seen 28. The train ______ half an hour ago. A. has been leaving B. left C. has left D. had left 29. My sister ________ for you since yesterday. A. is looking B. was looking C. has been looking D. looked 30. I ______ Texas State University now. A. am attending B. attend C. was attending D. attended 31. Christopher Columbus _______ American more than 500 years ago. A. discovered B. has discovered C. had discovered D. had been discovering VIII. Relative Clause 32. My sister, ___________ you are talking about, has been to Paris several time. A. who B. whom C. that D. whose 33. The baker ________ John quarrelled didn't want to sell him any bread. A. with whom B. who C. with whose D. to whom 34. I met the people, cattle and vehicles ___________ went to market. A. who B. which C. that D. whom 35. Mrs. May, ___________ husband teaches mathematics in this school, is also a teacher of English. A. who B. whose C. which D. whom 36. I will see you near the post office ___________ the other day. A. which met B. which we met C. where met D. where we met 37. The girl ______ is our neighbor. A. talks to the lady over there C. was talking to the lady over there B. is talking to the lady over there D. talking to the lady over there 38. None of the people __________to the party can come. A. invite B. invited C. inviting D. to invite 39. Neil Armstrong was the first person ______ foot on the moon. A. set B. setting C. to set D. who was set IX. Verb Form 40. I notice the lorry ........................ down the hill. A. to come B. came C. coming D. having come 41. Jack admitted ....................... the money. A. steal B. to steal C. stealing D. stolen 42. Your house needs _________ . 4 A. redecorate B. redecorating C. redecorated D. to redecorate 43. I really regret _________ your feeling when I asked you such a silly question. A. hurt B. hurting C. being hurt D. to hurt X. Choose the answer with the CLOSEST MEANING with the underlined words. 44. Many people left early because the film was uninteresting. A. exciting B. informative C. attractive D. boring 45. Reaching 35 and obviously aging, Jane has to make up her mind on her future very soon. A. give a thought about B. pay attention to C. prepare a plan for D. make a decision on XI. Choose the answer with the OPPOSITE MEANING with the underlined words. 46. Today students are under a lot of pressure due to the high expectation from their parents and teachers. A. nervousness B. emotion C. stress D. relaxation 47. Don’t tell Jane anything about the surprise party for Jack. She has got a big mouth. A. can’t eat a lot B. hates parties C. talks too much D. can keep secrets XII. Error Identification 48. Mary and (A) her friends is (B) going to (C) a party tonight(D). 49. I think it’s importance(A) for (B) us to find (C) solutions to our problem(D). 50. After she had bought (A) herself(B) a new motorcycle, she had sold (C) her bicycle(D).

- Ai giải giùm mình bài 27 vớiiii

Tìm cặp số nguyên (x, y) thỏa mãn: 1! + 2! + 3! + ... + x! = y²

Tính tổng của số nguyên âm nhỏ nhất có ba chữ số với số nguyên dương lớn nhất có một chữ số là bao nhiêu. Giúp mình với, đang cần gấp !!!

giúp mk nhé!!!!!!!! Một ôtô chuyển động đều với lực kéo 5000N đi hết quãng đường 1440m trong thời gian 40s. Tính công thực hiện và công suất của động cơ xe.