Exercise 1. Complete Susie’s reply to Rachel’s letter. Use the adjectives from the box. Big difficult exciting fun happy healthy tired Dear Rachel, Thank you for your letter. I also enjoy sports. I like playing basketball and swimming, but my favourite sport is football. I like football, because it is an __________ game, and it is a good way to stay __________ . I started playing football when I was 9. In the summer, I often go to a football summer camp. The summer camp is in the countryside, about two hours from my city, Los Angeles. It is near a ___________ forest. We do football training in the mornings and play matches in the evenings. In the afternoons, we do other sports like swimming, walking and cycling. We work hard, but we have a lot of __________ too. I also play for a football team. I joined the school team when I was 12. We do football training twice a week, and we usually play a match on Saturdays with other school teams. I always feel _________ after matches, so I go to bed early! Sometimes we play on the football field at our school, and sometimes we travel to other schools by bus and play there. Every year, our school enters a football competition with schools all over California. Last year, our team won the competition, so we were all really ____________ , and we had a special dinner at a restaurant to celebrate. Next year, I want to join another girl’s football team in Los Angeles. It is a strong team with lots of good players, so it’s _______________ to get onto the team. I need to do a lot of training this summer! Hope to hear from you soon! Best wishes, Susie

Cho tam giác ABC có AB = c, AC = b, đường phân giác AD, đường trung tuyến AM. Đường thẳng đối xứng với AM qua AD cắt BC ở N. Tính tỉ số BN : NC

Tam giác đều ABC có cạnh 60cm. Trên cạnh BC lấy điểm D sao cho BD = 20cm. Đường trung trực của AD cắt các cạnh AB, AC theo thứ tự ở E, F. Tính độ dài các cạnh của tam giác DEF

Tam giác ABC có góc A= 60 độ AB= 28cm, AC= 35cm . Tính độ dài BC

Chứng minh: `cos2\alpha=cos^2\alpha-sin^2\alpha`

Exercise 5 Read an article about a teenager’s hobby. Then complete the exercise. Adam Jones has an unusual hobby for a 15-year-old boy. Most of his friends like to spend their time playing sports like football and basketball or playing computer games, but Adam prefers to cook. Adam first became interested in food from watching cookery programmes on television, but he learned how to cook from his father who was a chef in a local Italian restaurant. His father says that Adam is now the best cook in the family. In the past, Adam’s father did all the cooking for the family, but now Adam cooks most of the family meals. His parents love Adam’s cooking, and even his younger sister Sarah eats most of the food he cooks. Adam likes cooking food from all over the world, but especially Italian, Indian and Thai food. Last year, he went on holiday to India and Thailand with his family, and he enjoyed trying all of the different dishes. Next year, he is going to travel to China and learn how to cook Chinese food. Adam also likes computers and has his own website called ‘Cook with Adam’. He first made the website as part of a school project, but now he uses it to tell people about his cooking and to teach young people how to cook. It has easy food recipes, photos of his food and videos to show people how to cook his favourite meals. The website is very popular with young people, and Adam hopes that it will make them more interested in learning to cook. His father now has his own restaurant, and Adam has a part-time job as a chef there. When people go to the restaurant, they are often surprised that the chef is so young. Adam’s father is happy for him to work there, but only at the weekends because he doesn’t want him to be too tired for school. Adam recently won the first prize in a cooking competition for young people in the UK. He made a chicken curry with rice and vegetables and a chocolate and raspberry dessert. He was very surprised to be in the final part of the competition, and he couldn’t believe it when he won first prize. He won £500 and a cooking lesson with a famous TV chef. Adam’s whole family were very happy that he won the competition, especially his father. After the competition, he appeared on a television news show and a cookery show. In the future, Adam wants to move to London and work as a chef at a top restaurant. He would also like to have his own cookery show on TV and to travel around the world and learn how to cook food from many different countries. Choose the correct answer, True or False. Read the article on the first screen again to help you. 1. Adam likes cooking more than playing football. o True o False 2. Adam learned how to cook from watching programmes on television. o True o False 3. Adam now cooks most of his family’s meals. o True o False 4. Adam only likes cooking Italian, Indian or Thai food. o True o False 5. Adam went to China with his family last year. o True o False 6. Adam made his website for a school project. o True o False 7. Adam’s father allows him to work at the restaurant on any night of the week. o True o False 8. Adam now has his own cookery show on television. o True o False

1 What _______ you _______ (buy) at the supermarket yesterday? 2 The teacher ________ (not be) very happy with my homework last week. 3 Where _______ your brother _______ (work) at the moment? 4 _______ you ever _______ (see) a James Bond film? 5 The weather was lovely yesterday so we _______ (walk) to work. 6 Hi! I _______ (wait) for the bus. It’s very late. 7 He always _______ (take) the train to work. 8 My friend has _______ (travel) all over the world. 9 _______ you _______ (be) to a music concert before? 10 A What are your plans for the holiday? B I _______ (fly) to Malta with my boyfriend. 11 Kate _______ (wear) her new dress to Dave’s party last Friday. 12 They _______ (not have) a holiday next year because Simon has lost his job. 13 They _______ (have) a holiday with their children next Christmas. 14 I _______ (speak) a lot of English in England last summer. 15 She _______ (not finish) all her work yesterday.

Đặc điểm cấu tạo ngoài của chim bồ câu thích nghi với đời sống bay lượn như thế nào? Giúp mik đi , sắp thi rùi.

Chứng minh bất đẳng thức sau đây : ( Xin cm chi tiết )

. Did you learn something ___________school? 2. Don't put all your eggs_____________ one basket. 3. Eric is studying____________the university. 4. I live _______________12 Columbus Street. 5. Is John still______________bed? 6. I've read it____________a book. 7. James met us___________the door. 8. Janet is _____________home right now. 9. I was stuck_________that traffic jam for hours! 10. She fell asleep __________the armchair. 11. Let's take the bus____________ Columbus Street. 12. Look,____________ the water! 13. There were no clouds ____________the sky. 14. Matthew was______________ work when I called. 15. Megan will be_____________the office from nine to four. 16. Mirror, mirror ___________the wall, ... 17. Rachel is ___________her desk. 18. There will be many new people ______________the party. 19. Kelly took us for a ride _______________her new car. 20. She looked _____________herself in the mirror. 21. She stood ___________the center of the stage. 22. There is always lots of action ___________Times Square. 23. The books were _______________the shelf. 24. The diagram is ____________page 12. 25. The dinner will be _______________Mark's. 26. The eggs are ________________the box. 27. The food is ____________the table. 28. The keys were not ____________his pocket. 29. The taxi will be waiting _____________the hotel. 30. There is a beautiful garden _________the back of the house. 31. She was standing all by herself________ the bus stop. 32. He was sitting_________the top of the stairs. 33. There is such a mess ___________the kitchen! 34. There were many beautiful flowers_________ the garden. 35. We had dinner ____________a very nice restaurant. 36. They are dancing _____________the street! 37. We used to live ___________the third floor. 38. They live ___________France. 39. Toni will meet us ____________the corner of the street. 40. Times Square is ___________New York. 41. We agreed to meet ____________the airport. 42. There is a lot to see ______________Texas. 43. We met _____________a wedding. 44. Where is he? He's ___________prison. 45. She put my shirts___________ the closet.