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decoutran
2 năm trước
Axit HCl có thể phản ứng với những chất nào trong các chất dưới đây : CuO,S,O2,Ag,AgNO3,Zn,C,Fe3O4,Fe(OH)3. Viết pthh
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II. Underline the correct word or phrase in each sentence. 15. Look at those clouds. I think it can / might / must rain. 16. This is impossible! It can’t be / mustn’t be / may not be the answer. 17. Well done! You may be / must be / might be very pleased! 18. I’ve no idea where Jane is. She could be / must be anywhere! 19. I suppose it’s possible. I might / can / must come to your party. 20. I’m not sure. I must not / may not be able to get there in time. 21. That can’t be / mustn’t be / may not be David. He hasn’t got a bike. 22. Lisa isn’t here yet. She can be / must be on her way. 23. There’s someone at the door. It can be / could be the postman. 24. III. Rewrite each sentence so that it has a similar meaning and contains the word in bold. 25. It would be a good idea for you to see a dentist. ought You 26. It’s not necessary for us to go to school tomorrow. have We 27. I’m sure that isn’t John, because he’s in Paris. be That 28. Perhaps Ann is at home. be Ann 29. You ought to wear a warm coat today. had You 30. It’s possible that I’ll be late. may I 31. I wouldn’t go skiing if I were you. think I don’t 32. It is forbidden to leave your bike here. can’t You Sorry, I can’t come / may not come out tonight. I have to do my homework. IV. Complete each sentence with one suitable modal auxiliary. 1. Soldiers … have … to obey orders. 33. I think you ……………………………….. take your umbrella. 34. Sorry, I ……………………………….. go now. I don’t want to be late. 35. I’m not sure, but I ……………………………….. be able to help you. 36. Francesca isn’t at home, so she ……………………………….. be on her way here. 37. We ……………………………….. better not leave any windows open. 38. It ……………………………….. be a star, it’s too bright. Perhaps it’s an alien spaceship! 39. I don’t ……………………………….. to go to work today. It’s a holiday. 40. Sorry, but I wasn’t ……………………………….. to finish all the work you gave me. 41. I think you ……………………………….. to ask your teacher for some advice.

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