Câu 1. Có thể dùng dung dịch HCl để nhận biết các dung dịch không màu nào sau đây?  A. NaOH, Na2CO3, AgNO3  B. Na2CO3, Na2SO4, KNO3  C. KOH, AgNO3, NaCl  D. NaOH, Na2CO3, NaCl giải thích nha

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III. ADJECTIVE CLAUSES Combine the following sentences using suitable relative pronouns ( who, whom, which, that, whose, where, when, why) 15. The bed was comfortable . I slept in it last night. ………………………………………………………………………………………………………… 16. Marie Curie was a French Physicist. Her discovery of radium is famous throughout the world. ………………………………………………………………………………………………………… 17. I don’t remember the day. I left school on that day. => . 18. She is the most intelligent woman. I’ve ever met this woman. …………………………………………………………………………………………………… 19. My brother came to see us. He is in the army. ………………………………………………………………………………………………………… 20. The strike at that factory is over now. It lasted three days ago. ………………………………………………………………………………………………………… 21.Professor Johnson is to visit the university next week. I have long admired him …………………………………………………………………………………..……… 22. Can you understand the question? He asked you the question last time. …………………………………………………………………………………..……… 23. Is that the girl? We saw her on T.V last night. …………………………………………………………………………………..……… 24. The farm produces milk. We visited it last Sunday. …………………………………………………………………………………..……… 25. At last he married the girl. He loved her. …………………………………………………………………………………..……… 26. The man is an engineer. We play with his daughter everyday. …………………………………………………………………………………..……… 27. He didn’t receive the letter. I sent him the letter last January. …………………………………………………………………………………..……… 28. He often tells me something about his village. He was born there. …………………………………………………………………………………..……… 29. The children like the funny stories. Their grandmother tells them those stories every evening. …………………………………………………………………………………..………