Answer:
7. The light will be turned on and the curtain will be closed by Sarah.
8. The ball has been hit right over the fence by my cousin Diana.
9. The game was ended by a sudden rainstorm.
10. The popcorn was spilled on the person in front of him by him.
11. Home was being walked by Fred alone.
12. All of my library books are going to be returned by me in March.
13. In line, at least one hundred people were waiting.
14. A new romantic novel is being written by him.
15. The air has been polluted by smoke and car exhaust.
16. On the grill, hot dogs and hamburgers are being sizzled.
17. The campers were scared by the thunder and lightning and kept awake.
18. The dishes will be washed and put away by me.
19. His favorite jacket has been lost by Scott's cousin.
20. A settlement was built on Kodiak Island by Russians in 1784.
21. Tom was being followed by two men.