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LAMLAM12
2 năm trước
cho phương trình mx^2-2(m-3)x+m+1=0 biết phương trình luôn có 2 nghiệm. tìm hệ thức liên hệ giữa 2 nghiệm mà không phụ thuộc vào m LÀM GIÚP MÌNH VỚI. MÌNH CẢM ƠN
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II. Find a suitable word for the sentences below. One example has been for you. 0. A. Boil plenty of salty water, and add the spaghetti. B. I'll boil the kettle and make some tea. C. She put some potatoes on to boil. 1. A. Leaving a room with turning off the lights is a waste of........ B. The........is off tomorrow. C. She always pays her........bills on time. 2. A..........energy is electricity or power that is produced using the energy from the sun, wind, water, etc. B. Is it an.........method of doing that? C. Do you have an.........solution? 3. A. Large amounts of fossil fuels are......by the electricity industry consumed B. Before he died he had..........a large quantity of alcohol. C. The hotel was quickly...........by fire. 4. A. The meat was declared unfit for human........ B. He was advised to reduce his alcohol........ C........rather than saving has become the central feature of contemporary societies. 5. A. The company is being actively considered as a........partner. B. They are........customers of our company; they will sign big contracts with us. C. First we need to identify actual and........problems. 6. A. All children should be encouraged to realise their full........ B. She has great........as an artist. C. The house has a lot of........ 7. A. He refused to........her arm. B. 10,000 balloons were........(-ed) at the ceremony. C. Intense heat is........(-ed) in the reaction. 8. A. This book is on the exploitation of minerals and other natural........ B. We do not have the........to update our computer software because we are having a financial problem. C. We must make the most efficient use of the available financial........ 9. A.......cell is a device that converts light and heat energy from the sun into electricity. B. The......radiation is sometimes very harmful to your eyes and skin. C. The......system consists of the sun and all the planets that move around it. 10. A. He has earned out extensive........into renewable energy sources. B. Recent........on deaf children have produced some interesting findings about their speech. C. Whathave their........shown?

Write the sentences, using the words given 1. Although / Phong / sleepy / stay up / watch / end / game / TV //. ………………………………………………………………………………………………………………….…………………… 2. Where / new / remote control / that / I / buy / last week //? …………………………………………………………………………………………………………………………..………………. 3. I / turn up / TV / because / want / hear / music / clear //. ……………………………………………………………………………………………………………………………………………. 4. What / kind / TV programme / you / like / watch / most / when / small //? ………………………………………………………………………………………………………………………………….………. 5. Hoa / like / eat / noodles / but / mother / always / cook / rice / her //. ………………………………………………………………………………………………………………………………………

1. A. cover B. go C. flow D. so 2. A. flow B. love C. stone D. November 3. A. books B. plans C. tables D. chairs 4. A. loses B. chooses C. magazines D. houses II. Choose the word or phrase (A, B, C, or D) that best completes each sentence (2.5ps). 5. She is ________hard for her A levels. A. having B. playing C. studying D. doing 6. I always ________a cooked breakfast. A. have B. do C. play D. study 7. She ________to be an architect. A. study B. studies C. studying D. is studying 8. I ________a one-hour lunch break. A. play B. have C. do D. study 9. I’m ________physics, biology and chemistry. A. playing B. having C. doing D. going 10. Do you want to ________cards with me? A. play B. come C. have D. learn 11. There are two lights ____the ceiling. A. at B. in C. on D. between 12. There is a family photo _____the wall. A. on B. at C. in D. next 13. There ______four chairs and a table _____ the middle of the room. A. is - on B. is - in C. are - at D. are - in 14. We need some chairs ______the kitchen. A. with B. for C. at D. on III. I 15. What time does Mai has English class? A B C D 16. There are a cupboard, a dishwasher and a table in the kitchen. A B C D IV. Choose the word which best fits each gap.(1.5pts) My dream school is a quiet school (17) ___________ we have just two or three hours a day, in the morning. Then, in the afternoon, we can do many (18) ___________ like singing, dancing, playing soccer, basketball, rugby. We won’t have tests and mark either. The teachers will not (19) ___________ homework, so we can do whatever we want after school. In my dream school, we can also choose the (20) ___________ we want: for example, you’re not going to learn mathematics or physics if you hate (21)___________. So it’s a free school where you can learn with calm and serenity and you can make (22) ___________ friends during afternoon activities! 17. A. what B. where C. when D. how 18. A. subjects B. actions C. activities D. acts 19. A. give B. take C. do D. get 20. A. class B. classrooms C. classmates D. classes 21. A. it B. them C. her D. him 22. A. much B. few C. any D. lots of V. Read the text and decide whether the statements are True (T) or False (F): (1pt) My dream house is a cottage not far from the sea. On the ground-floor, there are four rooms. The first room is my living room, which has a white sofa, a black armchair and a coffee table. There are lots of paintings and trinkets as well. There is also a lamp, French windows with a view of the garden, television set and a phone in the living room. My dream house has a fully-equipped kitchen, including a fridge and a door to the garden. There is a bathroom with a shower and toilet. There is also a study room where I keep my desk and computer. On the first floor, There are three bedrooms and a bathroom. 23. ________ There are 4 rooms in author’s house. 24 ________ There are grey armchair and a coffee table in the living room. 25. ________ There are French windows with a view of the sea. 26. ________ The kitchen in the house is fully equipped. VI. Finish each of the following sentences so that its meaning stays the same. (2ps) 27. My brother often drives to work.  My brother often goes_________________________________________________ 28. My sister goes to the market every day on foot.  My sister ___________________________________________________________ 29. There isn’t a telephone in the living room. → We 30. The house is behind the trees. → There are trees VII. Write sentences about your living room, your kitchen and your bedroom. (1.5pts) 31. In the living room, there's a sofa, there are two 32. In the 33. In the

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