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
