Cho 180 g dung dịch CH3COOH 15% tác dụng vừa đủ với 120 g dung dịch KHCO3 a tính nồng độ % của dung dịch KHCO3 đã dùng b tính nồng độ % của muối thu được c dẫn toàn bộ khí qua dung dịch Ca(OH)2 dư . Tính khối lượng kết tủa thu được

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Ex1: 1.Mary last saw Peter two years ago. -Mary hasn't....................................... 2. They moved to New York in 2004. (since) -They have lived................................ 3. I couldn't phone you because I didn't have number. -I didn't................................................ 4. Is this the most interesting book you have ever read? -Have you ever..................................... 5. Does Phong's house have twenty rooms? -Are there twenty.................................................? 6. He drives very carefully. -He is......................................... 7. It is possible that it will rain during our picnic tomorrow. -It................................................... 8. Why don't we go to Ha Long Bay? -Let's................................................ 9. London has many modern buildings. -There are......................................... 10. Did David start to live in Sydney two years ago? -Has David.........................................? 11. No cities in VietNam are more beautiful than Ho Chi Minh City. -Ho Chi Minh City is the ................................................ 12. What sport do you like best? -What is your..............................................? 13. Shall we play badminton this weekend? -How about ............................? 14. Beckham played football very well. -Beckham was................................. 15. I prefer walking to riding a bicycle -I like walking..................................... 16. She likes table tennis most. -Her favourite.............................. 17. ha isn't a bad swimmer. -Ha doesn't................................... 18. Your sister is always forgetting her homework. -Don't............................................... 19. I prefer going out to staying at home -I like ...................................................... CÁC BẠN GIÚP MIK VỚI CÂU TLHN LUÔN 5 SAO LUÔN