12. Had I worked hard at school, I would have gotten a good job when I left
13. Had it not been used, they wouldn't have spotted the shop-lifter
14. If he had been wearing a shirt, they wouldn't have asked him to leave the dinning room
15. Had the streets been clearly marked, we wouldn'y have spent a long time to find his house
16. My friend said if I sold it
17. If I had much time, I would read a lot
18. The roooms look rather darck because they don't clean the windows
19. If he polished his shoes, he would look smart
20. His staff isn't paid properly so they don't work well