Cho 4,8g CuO tác dụng với khí H2 khi đun nóng. Thể tích khí H2 (đktc) cần dùng cho phản ứng là A. 1,344 lít B. 5,6 lít C. 11,2 lít D. 14,22 lít

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III. Choose the best answer (A, B, C or D) to complete each sentence. 1. The news _________bad. She fainted after hearing that bad news. A. was B. were C. is D. are 2. He ate some dirty vegetables last night, so he had a ________. A. headache B. stomachache C. toothache D. bad cold 3. Would you like to have _________water? A. some B. any C. a few D. many 4. _________interesting stories are! They are worth reading. A. What B. Why C. How D. Which 5. I need some butter. I’m going to the ________. A. stationer’s B. butcher’s C. baker’s D. grocer’s 6. I promise I _________ and visit you. A. am coming B. will come C. have come D. am going to come 7. She is never late for school and _________is her sister. A. either B. so C. neither D. too 8. The doctor says you should spend ________time playing video games. A. lots of B. all your C. most of your D. a little 9. Nga decided ________how to use a sewing machine. A. to learn B. learn C. learning D. learnt 10. You’ve made a lot of mistakes in your work. You should never do it _________. A. hurry B. hurried C. in a hurry D. such hurry 11. Our school year usually starts in late August. It _________ for almost 9 months. A. wastes B. lasts C. lengthens D. takes 12. Neighbors don’t spend _________ time together as they used to do in the past. A. more B. less C. most D. as much 13. It’s a very busy airport. There are planes _________ and landing every 5 minutes. A. going up B. taking off C. getting up D. driving off 14. "Would you like to go to the movie downtown?"- "Thanks, but I _______ that film already." A. had seen B. was seeing C. have seen D. would see 15. “What about going to the movies?” – “_________” A. That’s a good idea. B. thanks C. Yes, I’d love to. D. We are going to the movie