Read the text carefully, then do the tasks. SOLAR ENERGY Sunlight carries huge amounts of energy. You can feel the Sun’s energy when sunlight warms your skin on a summer day. To capture the Sun’s energy, scientists have developed solar cells, called photovoltaic cells. These cells convert sunlight into electricity. When sunlight hits a solar cell, some of the light energy is absorbed. This light energy causes the particles in the solar cell to move faster, and the movement of these particles creates electricity. In some places, large panels of solar cells harvest sunshine to make electricity for homes and businesses. Solar cells have been placed on cars and appliances, too. Since the Sun sends abundant free energy streaming toward Earth 24 hours a day, people in many parts of the world, not just the sunniest places, have fixed solar cells and solar panels on the roofs of their houses or businesses to lower their energy costs. Experts say that the huge installation of solar panels in sunny regions could generate enough electricity to supply an entire country. Capturing this energy can help overcome our diminishing energy supply. New ways to capture this energy are being developed an the time to maximize efficiency. 38. What is the source of solar energy? a. sunlight b. photovoltaic cells c. solar panels d. electricity 39. Solar cells are used a. to collect energy from the sun b. to provide sunlight to houses c. to convert sunlight into electricity d. both a and c are correct 40. As used in line 7, ‘abundant’ most nearly means . a. unlimited b. dangerous c. plentiful d. clean 41. Where have people fixed solar panels? a. In the sunniest places b. Anywhere outside their houses c. Inside their houses d. On the roofs of their houses Choose the underlined word or phrase (A, B, C or D) that needs correcting. 42. Life in the city is more stress than life in the country. A B C D 43. A new factory will be build in my neighbourhood. A B C D 44. Your uncle worked in Ha Noi for one year then moved to Da Nang, doesn’t he? A B C D 45. He will clean his house at 9 am tomorrow. A B C D

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Lớp 6A có 52 học sinh.Biết rằng số học sinh giỏi chiếm 1/4 cả lớp và bằng 1/2 số học sinh tiên tiến,còn lại học sinh trung bình a)Tính số học sinh mỗi loại b)Số học sinh tiến tiến chiếm bao nhieu phần trăm số học sinh cả lớp

ba dien tro R1 , R2, R3 mac noi tiep nhau vao hai dau dien mach co hieu dien the K . Biet R1=R2=3R3. Cuong do dong dien trong mach la 2A. tinh gia tri cac dien tro

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Choose the word or phrase (A, B, C or D) that fits the blank in each sentence. 9. ____________ is not very far from here to the harbour. A. There B. It C. This D.That 10. Linda used to ________ morning exercise when she got up early. A. did B. does C. doing D. do 11.They ___________ a test tomorrow; we don’t want to disturb them. A. will be having B. will have C. have D. had 12. ____________ being frightened by the images, Lan still liked the film so much. A. In spite B. Despite C. Although D. Nevertheless 13. The sun and the wind are other ____________sources of energy. A. alternative B. renewable C. non-renewable D. nuclear 14. ________ the film was gripping, Tom slept from beginning to end. A. Therefore B. Despite C. However D. Although 15.At 7.00 tomorrow, you ___________ to school. A .cycle B. will cycle C. will be cycling D. will be cycled 16.Solar energy ___________ by many countries in the world in the future. A. use B. will use C. will be using D. will be used 17. Tom has to go to the bus stop if he wants to go bus. A. at B. on C. in D. by 18. Coal is a __________ energy. A. nuclear B. solar C. biogas D. natural 19. We should __________ low energy light bulbs. A. use B. using C. used D. to use 20. The wind turns __________ to make electricity. A. fans B. leaves C. turbines D. kites 21. We ________ an English test tomorrow. A. will have B. have C. has D. had 22. Solar energy will ________ to solve the problem of energy shortage. A. use B. be used C. used D. using 23.You should turn ________ the lights when leaving the rooms. A. on B. off C. right D. left 24. _____________home is located downtown, so it’s close to my work. A. Mine B. Ours C. Our D. We 25. John doesn’t drink much coffee. He drinks ________ coffee than his friends do. A. more B. less C. fewer D. most 26. I avoid ..................... the car whenever possible, especially in a big city A. took B. taking C. is taken D. take 27. Crime will affect everyone in different ways, ________? A. doesn’t it B. will it C. won’t it D. will they 28. Mumbai has a population of around 21 million people, ________? A. hasn’t they B. has it C. doesn’t it D. don’t it 29. Day of the Dead is celebrated_______ November 1st in Mexico. A. on B. in C. at D. during 30. ________do people celebrate Diwali? - They celebrate it with music, lights, fireworks and traditional sweets. A. How B. What C. Why D. Where 31. If we reduce the energy we use, we……………….money. A. are saving B. will save C. will be saved D. will be saving 32. Your travel plans sound just as exciting as________________! A. I B. me C. my D. mine

tìm tất cả các giá trị thực của tham số m để hàm số y = m $x^{4}$ +(m-1)x² +1-2m có 1 điểm cực trị __________________ đồ thị của hàm số y = -x³ -3x² -9x+1 có 2 điểm cực trị A và B tính diện tích tam giác OAB vs O là gốc tọa độ

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