1. they
2.it
3.This book is mine
4.that books are ours
5.Dancing is of her sister fnd.
6. Bussiness and Electronics college s one of the best colleges in Orenburg
7. 1. who 2. yourself
8. 1. which 2.myself
9.b
10. c
11. 3. was 4. is not 5. have 6. is 8. is 10. passed 12. have 15. haven`t
12. b
13. a
14. 1,
15. 1.2.4.
16. b
17. c
18. b
19. b
20.a
21. c
22. a
23. ac
bd
cb
da
24. b