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Ritawang
2 năm trước
1 cano chuyển động với vận tốc 54km/h , nước chảy với vận tốc 5m/s. Tính vận tốc của thuyền so với nước khi a thuyền và nước chuyển động cùng chiều b thuyền và nước chuyển động ngược chiều
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Các câu hỏi liên quan

31. Some animals (not eat) _________ during the winter. 32. I (not play) _________ football since I (break) _________ my leg. 33. It was 11 o’clock and we (just go) _________ to bed when the telephone (ring) _________. 34. I (think) _________ your father’s heath (improve) _________so much sinse I (see) _________ him last. 35. There (be) _________no guests at all since I left. 36. We hope that you (enjoy) _________ the concert last night. 37. Look! That little girl (run) _________ to catch the bus . 38. By the time I got to Mai’s house , She already (leave) _________ for work. 39. Do you think it (rain) _________ tomorrow? 40. I hope they (repair) _________ this road by the time we (return) _________ next summer. 41. Anna and Susan (make) _________ dinner when Martin (arrive) _________ home. 42. My grandmother (visit) _________ us next Sunday. Would you like (meet) _________them? 43. Paul (be) _________ born in France, but now he (live) _________in America with his uncle. 44. I hope my sister (send) _________ me a letter soon. 45. Trung’s father (teach) _________him how (ride)_________. 46. We (go) _________ to Ha Long Bay this weekend. 47. Did you use to play so much when you (live) _________ in the country? 48. Yesterday Hoang (spend) _________ two hours (repair) _________ his computer. 49. They (work) _________ very much when they (be) _________ young. 50. They (leave) _________ Hanoi for HCM city yesterday.

1. I (listen)_______ to the radio when you ( ring ) _______ the bell last night. 2. She asked me if I (can) _______lend her some money. 3. Your report should (write) _______in English. 4. This is the third time I (visit) _______ Nha Trang. 5. How long you (be) _______ here? 6. The sewing machine which you (use) _______ at present (invent) _______ in 1830 by a French 7. I (not see) _______ your uncle recently. 8. My uncle (just open) _____________ a new internet house on Hang luoc street. 9. Uyen (take) _______ a bus to school every day. 10. Linh’s brother (lose) _______his job last month and since then he (be) _______ out of work. 11. You (see) _______ Mrs Chi recently? - Yes, I (see) _________ her in the school gate 3 days ago. 12. Nam (not buy) _______ a new computer since he (sell) _______ the old one last month. 13. I (not have) _______ a good sleep for a long time. I now feel very tired. 14. I can’t go out because I (not finish) _________ my homework. 15*. I (not use) _________the car this evening, so you can have it. 16. Trang isn’t in her room at the moment, he (cook) _________ in the kitchen. 17*. She broke the vase when it (move) _________ to the other room. 18. What do you think our children (do) _________ when we get home? 19. I hope the cat (feed) _________ well. 20*. She (see) _________ to go out twice a day. 21. They (be) _________ the 9th form pupils next school year? 22. When I see my sister again, she (finish) _________ all her exams. 23. He (do) _________ nothing before he (see) _________ me. 24. Farmers often (harvest) _________ their crops in August. 25. Be careful! A car (come) _________ . 26. There (be) _________ no rain here for the last month. 27. There (be) _________ no visitors here for the last month. 28. When I came to see them they (play) _________ chess. 29. She (be) _________ here in five minutes. 30. He said he (go) _________ on a trip to London some days.

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