29. B cleaned
30. A do
31. D was made
32. D The room is cleaned by somebody everyday.
33. A This road is not used very often.
34. B How are languages learned by people
35. B is being installed by people
36. C must be followed
37. B are built/were built
III
1. B - frightened
2. C - were taken
3. D - announced
4. A - 0
5. C - was
6. C - accompanied
7. A - was given
8. C - worried
9. D - had happened
10. C - serviced
11. C - were
12. B - 0
