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2 năm trước
Cho 12,1 gam hỗn hợp Fe và Zn tác dụng với 850 ml dung dịch HCl 1M. Hãy chứng minh kim loại tan hoàn toàn
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Làm giúp em ạ 1.mary doesn’t have enough free time to visit her old friends. Mary wishes……………………………..time to visit her old friends. 2. “ Are you writing to your penpal now?” He asked me……………………………….to my penpal then. 3. Tom painted a picture, and it's being shown in an exhibition. The picture………………………………………………shown in an exhibition. 4. Despite their poverty, the children seemed very happy. Although…………………………………………they seemed very happy. 4. They live in a very lovely house. The house………………………………..very lovely. 5. She asked me, “What are you doing now?” She asked me…………………………………then. 7. His parents made him study hard for the exam. He………………………………….hard for the exam. 8.. I only found out the truth because I heard the two of them talking. If I ……………………………………..them talking, I wouldn’t have found out the truth. 9. This food is so good that I’m going to have some more. This is……………………………………I am going to have some more,____________ 10. Could you give me some advice? I………………………………………..give me some advice. 11.The boy feels sick because he eats too many cakes. If the boy…………………………………cakes, he wouldn’t feel sick. 12.What about keeping our environment unpolluted? I suggest ………………………………………. unpolluted. 13.The test we did yesterday was so difficult that we couldn’t finish it in two hours. - Yesterday we did…………………………….that we couldn’t finish it in two hours. 14.“How many students are there in your class ?” - The man asked me how many……………………………….my class. 15.People have said that the police rescued ten people trapped in the collapsed house yesterday. It………………………………………………………………………………..

IV. Read the following passage, and choose the best answer that follow. Thomas Alva Edison was born in Ohio in 1847. As a child, he received less than a year of formal schooling, but was educated at home. His parents allowed him to set up a laboratory in their basement and his mother gave him books about chemistry and electronics. Edison credits his mother as being ‘the making’ of him. In 1878, Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, 1878, Edison filed his first patent application for "Improvement In Electric Lights". In 1879 he created a successful incandescent light bulb. This was his hardest project – from 1877 to 1880, Edison and his assistants tried around 3000 experiments to perfect their light bulb design. By the end of 1880, Edison had produced a bulb that lasted 1500 hours. This discovery marked the beginning of commercially manufactured light bulbs and in 1880, Thomas Edison’s company, Edison Electric Light Company began marketing its new product. 19. When was Edison born? A. in 1878 B. in 1847 C. in 1877 D. in 1500 20. Where was Edison’s laboratory? A. at his school B. in a company C. in the city D. in their basement 21. How many hours did the 1880 bulb last? A. 3000 B. 1500 C. 1880 D. 1878 22. What does the word “its” in the last sentence refer to? A. Thomas Edison’s company B. Thomas Edison’s patent C. Thomas Edison’s invention D. Thomas Edison’s discovery

15. We( be ) ......................tired and we ‘d like (sit) ...............down. 16. My parents ( visit ) …....…Ha Long Bay this summer vacation. 17. Nam usually ( study ) ………....in the school library in the afternoon , but he sometimes ( play )……soccer with his friends. 18. Mr Minh ( not / live ) ......in town. His house is in thecountry. 19. My father ( watch ) ……….television in the living-room . He often ( watch )…… T.V. in the afternoon . 20. Lan and Phuong (be ) …….….in the kitchen . They ( cook ) ………….dinner now . 21. We (eat).................... a delicious dinner at a Mexican restaurant last Wednesday. 22. Yesterday, I (phone)...................my friend in American. 23. Where..............you (go)................last week? I (stay).................at home and (listen)...................to some English songs on radio. 24. What are you doing now? I (do).........................my Math exercises. 25. My father often (watch)...................the morning news while he is having breakfast. 26. She (not visit).........................her grandmother last week. 27. They (not go)..........................to school yesterday. 28. We (have)........................Geography tomorrow. 29. He (not come)............................to see me next weekend. 30. They (not read)......................books now, they (talk).....................about the film.

1. _____________________ 200BC; protects borders; longest man made structure. Capital: Beijing 2. _____________________ world’s tallest twin buildings - 452 meters tall. There is a skybridge between the towers. Capital: Kuala Lumpur. 3. _____________________ largest 4 sided clock. Symbol of the UK. Capital: London 4. _____________________ 300 meters tall - 3 floors; tallest structure until 1930; mostvisited landmark in the world. Capital: Paris 5. _____________________ NYC Skyscraper - 103 floors; from 1931 - 1970 world’stallest building. Capital: Washington, D.C. 6. _____________________ built of white marble; tomb built by emperor in memory of3rd wife. Capital: New Delhi 7. _____________________ 1150 AD completed; pictured on flag; largest religiousmonument in the world. Capital: Phnom Penh 8. _____________________ one of the most loved buildings in the world; performing artscenter; supposed to represent a sail boat. Capital: Canberra

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