Verified answer

1 have explained

2 were explained

3 will be explained

4 is explaining

5 will believe

6 happened

7 ended

8 offrered

9 was offered

10 was put

11 wil be put

12 opened

13 was.... developed

14 is repainted

15 repainted

16 was repainted

17 will be repainted

18 be repainted

19 will repaint / are going to repaint

20 were used