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Nhận biết các lọ chứa riêng mất nhãn sau NaCl FeCl3 MgBr2 K2SO4 CuCl2 (bằng 1 kim loại) AgNO3 KI BaF2 KBr HCl (không dùng quỳ tím)
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môn các thầy các cô các bạn các mod giúp em giải với Exercise 2: Complete each of the sentences with a suitable relative pronoun. 1. The man ................. I had come to see was sitting at the desk. 2. He introduced me to his students, most of ..................... were from abroad. 3. Most of the goods .......................... are made in this factory are exported. 4. The car crashed in to a group of students, four of ...................... were injured. 5. Paul, ................... tires were nearly new, wanted to take the mountain road. 6. I met Mary, ..................... asked me to give you this. 7. I always remember the day ............................ I first met him. 8. The roads were crowded with refugees, many of ........................ were wounded. 9. I missed the train ...................... I usually catch. 10. I saw several houses, most of ....................... were quite unsuitable. 11. I have a book ......................... I must read. 12. The club needed a room ...................... could hold meetings. 13. That was the trip during ........................ Sam fell off the bicycle. 14. We often visit our friend in Bristol ............................ is only 30 miles. 15. They liked the band concert ............................... reminded them of their childhood. 16. The girl ............................ picture you are looking at is my sister. 17. There is the man .......................... name we were wondering about. 18. He lives in a new park.....................there is a new swimming pool. 19. He expected me to pay $4 for 12 eggs, 4 of ......................... were broken. 20. The man ......................... lives next door is a doctor.

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