Ответ: Здание 12:

1. which

2. which

3. which

4. what

5. what

6. which

7. which

8. which

9. which

10. what

11. which

12. which

13. what

14. what

15. which

Задание 13:

1. who

2. whose

3. whose

4. who

5. whom

6. who

7. whose

8. who

9. whose

10. whom

11. who

12. who

13. whose

14. whose

15. who

Задание 12

1) What

2) Which

3) Which

4)What

5) What

6) Which

7) Which

8) Which

9) Which

10) What

11) Which

12) Which

13) What

14) What

15) which

Задание 13

1) Who.

2) Whose

3) Whose

4) Who

5) Whom

6) who

7) whose

8)Whom

9)Whose

10) Who

11) Who

12)whom

13) Whose

14)Whose

15) Who