a)16 2/3:(-3/5)-28 2/7:(-3/5) b)2 1/2+4/7:(-8/9) c)1:(2/3-3/4)² d)(-1/2)²:1/4-2.(-1/2)³ e)3/7+5/13+4/7-18/13 f)2/5+1/5.(-3/4) g)2/5.(-7/8)-1/5 h)3/4.26 1/5-3/4.44 1/5 i)6-3.(-1/3)³ l)(-2/3-0,6):19+0,5.(1/5):(-0,2)

Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions. Question 31: We eventually caught a train. It was one that stops at every station. A. We eventually caught a train to stop at every station. B. We eventually caught a train stops at every station. C. The train we eventually caught it was one that stops at every station. D. The train we eventually caught was one that stops at every station. Question 32: I noticed that the door was open, I decided to go in. This turned out to be a mistake. A. Noticing the door was open, I decided to go in turning out to be a mistake. B. I noticed that the door was open deciding to go in, which turned out to be a mistake. C. I noticed that the door was open, decided to go in and turned out to be a mistake. D. Noticing the door was open, I decided to go in, which turned out to be a mistake. Question 33: Some people wanted travel scholarships. The end of the week was the deadline. By then everyone had applied. A. At the end of the week that is the deadline, everyone who wanted travel scholarships applied for them. B. By the end of the week, which was the deadline, everyone who wanted travel scholarships had applied for them. C. By the end of the week that was the deadline, everyone who wanted travel scholarships had applied for them. D. At the end of the week, the deadline, everyone wanting travel scholarships applied for them.

Sheffield Football Club was founded one-hundred-and-fifty years ago, and is the oldest in the world. As part of its anniversary celebrations, the club has joined (26) ______ with the world's largest express transportation company, FedEx Express, in a charitable scheme known as Boots for Africa. The aim of the scheme is to send more than two thousand pairs of used football boots to South Africa. The boots will be given to young people living in remote rural areas who are interested in taking up the sport and setting up local teams. Sports organizations in Africa are giving their (27) ______ support to the scheme which will help make the game more accessible to thousands of young people and could have a beneficial effect on the country's performance in future World Cup championships. People in Sheffield are, (28) ____, being asked to donate any football boots, astro boots or football trainers of any size to the scheme. All the boots donated must be in good (29) ____, complete with laces and studs. Local businesses and schools who may be able to donate more than one pair of boots can receive a special 'group donation pack'. This pack contains posters and leaflets, which can be used to publicize the scheme, plus collection bags to encourage people to (30) _____ a donation. The club's website has further information about the scheme. Question 26: A. strengths B. hands C. forces D. powers Question 27: A. popular B. full C. qualified D. limited Question 28: A. although B. however C. therefore D. despite Question 29: A. condition B. fitness C. form D. state Question 30: A. do B. make C. put D. hand

Mark the letter A, B, C, or D to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions. Question 21: The dentist administered laughing gas to her patient in order to ease his discomfort. A. worsen B. alleviate C. generate D. devastate Question 22: Mahayana Buddhism is the main religion in China, Japan, Korea, and much of Vietnam. A. predominant B. subordinate C. subsequent D. commercial Mark the letter A, B C or D to indicate the underlined part that needs correction in each of the following questions. Question 23: He took one pair of shoes, two shirts and two trousers, but he forgot to take socks. A B C D Question 24: Pasteurization is the process of heating milk to destroy disease-caused organisms and bacteria. A B C D Question 25: Astronomers do not have sufficient information to determine what the solar system was created. A B C D

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1: A. cups B. coughs C. jobs D. plates Question 2: A. control B. comment C. proposal D. solution Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. Question 3: A. preservation B. sympathetic C. individual D. television Question 4: A. respectful B. interesting C. forgetful D. successful Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 5: The environmental group hopes _____ the forest to its original condition by the end of the decade. A. to be restored B. to restore C. having restored D. to have been restored Question 6: No one knows where Sam is living now. The last time that I ______ on him was about four years ago. A. chanced B. ran C. came D. encountered Question 7: I can’t believe that you _____ three pizzas already! I ______ them in fifteen minutes ago! A. have eaten – only brought B. have eaten – have only brought C. ate – only brought D. have been eating – only brought Question 8: There are several habits that man takes from his childhood and continues to use even after he reaches and _____ maturity. A. accomplishes B. attains C. obtains D. comes Question 9: When are you going to get rid of these _______ trousers? A. short nylon dreadful French B. short dreadful French nylon C. dreadful French nylon short D. dreadful short French nylon Question 10: She said that if I ______ back the following day, she ______ able to help me. A. had come – would have been B. came – would be C. would be – were D. would have come – had been Question 11: What are you thinking about? A ______ for your thoughts. A. penny B. shilling C. pound D. dollar Question 12: As an adult, I’m independent ______ my parents financially. A. on B. with C. of D. from Question 13: He was especially interested in such ______ work, and had recently helped to organize the first Brazilian school for deaf-mutes at Rio de Janeiro. A. humanistic B. humanity C. human D. humanitarian Question 14: Necessity is the _______ of invention. A. father B. ancestor C. mother D. antecedents Question 15: It was last night _______ Sue borrowed my bike. A. when B. that C. at which D. which Question 16: Nuclear engines operate without air and consume ______ fuel than do other engines. A. much less B. much fewer C. a lot higher D. far more Mark the letter A, B, C, or D to indicate the most suitable response to complete each of the following exchanges. Question 17: Tom: - “Bill says that he’s going to start going to the gym”. Anna: -“_______.” A. That will be the day B. I’m keeping my fingers crossed C. I can’t agree more D. Sure thing Question 18: Peter: - “Help me with this!” Mary: - “_______.” A. I come at once. B. Just a minute! C. Moment! D. Wait on! Mark the letter A, B, C or D to indicate the word(s) CLOSET in meaning to the underlined word(s) in each of the following questions. Question 19: When the body is stressed or frightened, adrenaline travels throughout all parts of the body in the blood, keeping energy levels high. A. interprets B. originates C. blocks D. circulates Question 20: The reporter’s weekly review on Hollywood stars and gossip was the network’s most popular show. A. expenditure B. impetus C. commentary. D. revenue

(x-3)(y+5)+y(3-x)-7x rút gọn rồi tính biểu thức tại x =1/2, y= 1001 xin các bạn giúp mik

Rewrite 1. You should try to stop smoking ( better) -> You 2. Leo didn't intend to miss his favorite TV program (intention) -> Leo had 3. You don't have to pay the fees in advance (necessary) -> It 4. I haven't gone swimming for six month -> It's 5. He accused me of cheating them in the exam. -> I 6. You should apply for a university next year -> If I 7. Tuan goes to school with Peter, he is really good at math. -> Alice, 8. The exam was too difficult for me to pass. -> It was 9. it's nearly 20 years since my father saw his brother -> My father 10. Tom went to England last Sunday and is still there -> Tom has

điều gì sẽ xảy ra nếu người trưởng thành vẫn tiết nhiều hoocmon GH ?

tàu của thuyền trưởng jack và đoàn thủy thủ,lúc cách bến 150km thì bị thủng, cứ 6 phút thì có 2 tấn nước tràn vào tàu.nếu có 90 tấn nước tràn vào thì tàu sẽ bị chìm.trên tàu có 1 máy bơm,mỗi giờ máy bơm ra được 5 tấn nước.hỏi tàu phải chạy với vận tốc chậm nhất là bao nhiêu để khi cập bến vẫn chưa chìm?

FREE PASCAL Viết chương trình tính tổng các số nguyên tố Yêu cầu: Viết chương trình nhập vào 2 số tự nhiên a,b (a>=2, a<b) và hãy tính tổng của tất cả các số nguyên tố từ a đến b. Dữ liệu vào: Hai số tự nhiên a,b được nhập từ bàn phím, có kiểm tra giá trị nhập . Kết quả ghi ra file văn bản tongnto.out là tổng của các số nguyên tố từ a đến b. Để có file tongnto.inp thì viết câu lệnh sau: assign(f1,'Tongnto.inp');reset(f1); ' ' tongnto.out thì viết câu lệnh sau: assign(f2,'tongnto.out');rewrite(f2);