Hai vòi nước cùng chảy vào một bể cạn. Biết rằng để chảy được nửa bể, một mình vòi A phải mấy 2h30p, còn một mình vòi B chỉ mất 1h40p. Hỏi trong 1h, vòi nào chảy được nhiều nước hơn và nhiều hơn bao nhiêu?

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các bạn làm hết hộ nha thêm nha: 1. She ………………. to the radio in the morning. A. listen B. watches C. listens D. sees 2. My friend ………………. English on Monday and Friday. A. not have B. isn’t have C. don’t have D. doesn’t have 3. I am ……….., so I don’t want to eat any more. A. hungry B. thirsty C. full D. small 4. ………………. do you work? - I work at a school. A. What B. Where C. When D. How 5. I’m going to the ……………….. now. I want to buy some bread. A. post office B. drugstore C. bakery D. toy store 6. Is this her …………………? A. erasers B. books C. an eraser D. eraser 7. The opposite of “weak” is ……………………………… A. thin B. small C. strong D. heavy 8. She doesn’t have ……………….. friends at school. A. a B. some C. many D. much 9. ………………… long or short? A. Does Mai have hair B. Is Mai’s hair C. Does Mai’s hair have D. Is hair of Mai 10. What does Lien do when ……….. warm? A. it B. it’s C. its D. they’re 11. ………………. you like a drink? A. What B. Would C. Want D. How 12. I need a large ………….. of toothpaste. A. bar B. can C. tube D. box 13. What about …………….. to Hue on Sunday? A. to go B. go C. going D. goes 14. Mr & Mrs Brown & their father have ……………… legs. A. four B. six C. eight D. ten 15. I usually go swimming in hot ………………….. A. winter B. autumn C. day D. summer 16. There are …………………. fingers in one hand. A. two B. five C. ten D. one 17. My school …… three floors and my classroom is on the first floor. A. have B. has C. are D. is 18. His mother is a doctor. She works in a ………………… . A. hospital B. post office C. restaurant D. cinema 19. Vietnam has two main ……………… each year. A. seasons B. months C. weeks D. summers 20. It is twenty – five past ……………………. A. fifty B. a quarter C. four o’clock D. eleven