19. A That's a good idea.
20. C That's a pity
21. C developed
22. B more sencond -> second most
23. D announcing -> announced
24. D saving-energy -> energy-saving
25. B frightenning -> frightened
IV
26. was watching
27. haven't lived
28. receiving
29. write
V
30. instruction
31. scientists
32. unsucessfull
33. urbanized