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minhlu2602
2 năm trước
Trên quãng đường nhất định , một chất điểm chuyển động nhanh dần đều ko vận tốc đầu với gia tốc a mất thời gian T . Tính thời gian hất điểm chuyển động trên quãng đường này nếu chuyển động của chất điểm là luân phiên giẵ chuyển động với gia tốc a trong thời gian T1=T/10 và chuyển động đều theo thời gian T2=T/20
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11. Drinking this water is not safe. à It’s not ________________________________________________________________________ . 12. Swimming across this river is dangerous. à It is___________________________________________________________________________ . 13. To do this exercise is not easy. à It’s ___________________________________________________________________________ . 14. It is difficult to open the window. à To open____________________________________________________________________ à The window _______________________________________________ 15. They are going to see a movie. à They will__________________________________ à They intend___________________________________ 16. I ought to go and visit Grandma after work. à I have______________________________________________ à I must_____________________________________________

IV. Rewrite: 1. He wasn’t very experienced . He couldn’t do the job . à He wasn’t_________________________________ . 2. The worker is very clever . He can make fine things from wood. à The worker ________________________________________ . 3. You are not old . You can’t have a front – door key. à You ___________________________________________ 4. Hoang was very foolish . He told lies to the police . à Hoang was_____________________________________. 5. She is very tall . She can play basketball. à She_______________________________________________________ . 6. He can’t play volleyball because he isn’t tall. à He_______________________________________________________ . 7. I couldn’t drive a car because I was young. à I wasn’t______________________________________________ . 8. Peter couldn’t touch the ceiling because he was very short. à Peter was not ___________________________________________ . 9. They intend to ski this Sunday. à They are________________________________________________________ 10. To see from here is difficult. à It’s_____________________________________

31. My mother often spends her free time ____volunteer work at a local orphanage. (to do /work/doing/to work) 32. It’s easy to find my school . It’s _____ the Central Bank. (opposite, under, next, beneath) 33. They put the _____ on the floor, between the armchair and the couch. ( picture , shelf, cushion, rug) 34. Tuan is only seven, but he can eat two _______of rice every meal. (sinks, steamers, saucepans, bowls) 35. You use a ________to cook rice. (sauce pan, rice cooker, frying pan , steamer) 36. You can find the ___________on the couch. ((cushion, bookshelf, sink, TV) 37. There are some______________in the kitchen. 9(bookshelves, cupboards, couches, armchairs) 38. Young children don’t understand that some_________objects are dangerous. (home, house, household, homework) 39. Let’s paint the house __________ .It will be cheaper.(herself – himself – ourselves – themselves) 40. He finally came up ________ the decision to go abroad. (with, for , to, in )

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