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txtrinhnguyen
2 năm trước
Trung bình cộng của 3 số là 12,9 tìm số thứ nhất bết rằng số thứ nhất bằng trung bình cộng của 2 số còn lại Giúp e vs làm theo cách của cấp 2 ạ!
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Exercise 1: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions 1. During his ​the family lived in Cornwall. A. child​B. childlike​C. childish​D. childhood 2. How many ​were there in all? A. compete​B. competitions​C. competitive​D.competitors 3. We won't buy the car until the ​arises. A. necessary​B. necessity​C. necessarily​D. unnecessary 4. ​waste is one of the causes of air pollution. A. Industrious​B. Industrial​C. industry​D.industrialization 5. Mount Vesurius is an ​volcano. A. act​B. active​C. action​D. activity 6. He is confident enough to express his opinion ​ A. comfortable​B. comfort​C. comfortably​D.uncomfortable 7. She is so busy with ​activities that she has no time forentertainment. A. society​B. social​C. sociable​D. socialization 8. One day, young Faraday attended a lecture given by a ​scientist, Sir Humphry Davy. A. famous​B. fame​C. famously​D. infamous 9. He has been very interested in doing research on ​since he was at high school. A. Biology​B. biological​C. biologist​D. biologically 10. You are old enough to take ​for what you have done. A. responsible​B. responsibility​C. responsibly​D.irresponsible

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