Choose the correct answer

Here are the correct answers for each question based on the provided choices:

1. C. who
2. D. whose
3. D. whose
4. B. which
5. C. whom
6. B. which
7. A. who
8. B. which
9. A. whose
10. A. which
11. A. whose
12. C. which
13. C. who
14. A. who
15. D. whose
16. A. who
17. B. which
18. C. which
19. D. whom
20. D. whose

For the combine sentences section:

1. This is the worker who was destroyed in the flood.
2. These girls are pretty, who follow them everywhere.
3. How can I forget the day when you told me you would leave me alone on that day.

Make sure to adjust those last sentences for grammatical accuracy as needed!