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tramanh25st
2 năm trước
Cho 4,48 lít khí propin (đktc) tác dụng với một lượng dư dung dịch AgNO3 trong NH3. Tính khối lượng kết tủa tạo thành.
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III. Complete the sentences with the correct forms of MUST, HAVE TO or SHOULD 1. They __________ arrive in a few hours. 2. They __________ go home at 12 because my mother wants the motorcycle. 3. They insist that we __________ have a meal before the trip, 4. If there are no trains today, we will __________ go by coach. 5. I think you __________ tell your parents you’re going to be late so that they won’t be worried. 6. Visitors __________ feed the animals in the zoo. 7. The manager suggested that we __________ try to find another hotel. 8. You __________ see the film if you have time. 9. Staff __________ smoke when serving customers. 10. Do you think we __________ ask before we borrow the dictionary? 11. You __________ come to the party if you don’t want. 12. You __________ smoke at your age. 13. I don’t want to __________ wait in a queue for ages. 14. Do you think I __________ tell the teacher what happened? 15. My teacher told me that I __________ be late. 16. You __________ get up early tomorrow if you don’t want to miss the first bus. 17. Although you have a passport, you __________ have a visa to come to the USA. 18. Tom __________ go to the bank because he has no money left. 19. We __________ work late last night. 20. You __________ be carefully in public areas in big cities in order not to be cheated.

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