все предложения
Там надо вставить for или since

3 since
4 for
5 since
6 since
7 for
8 for
9 for
10 since
11 for
12 since
13 since
14 for
15 for

ответ:3. since

4. for

5. since

6. since

7. for

8. for

9. for

10. since

11. for

12. since          

13. since

14. for

15. for