1. seeing (past tense)
2. to blow up
3.seeing (past)
4.working
5.leave
6.singing
7.to discover
8.asking
9.to be
10.waiting
11.sitting or to sit
12. to drink
13. interrupting
14.to buy
15.to waste
16. entering
17.spendings
18. to accept
19. to repair
20.writing