=>
III/
16. hold
17. are having
18. to donate
19. invited
20. to donate
21. visited
22. are
23. help
24. to hold
25. are donating
26. isn't
27. made
28. help
29. recycling
30. donating
IV/
1. Ha Noi will be visited by my sister tomorrow.
2. Mr Lan wishes he had a computer.
3. The flowers are watered by my father every day.