I believe this is it: 1. us 2. who 3. us 4. who 5. we 6. us 7. who 8. we 9. us 10. who 11. us 12. who 13. we 14. us 15. we 16. who 17. we 18. whom 19. who 20. us
Important tip: We vs. Us We is a subject, Us is not. Whom vs. Who Use whom if it can be replaced with him/her. Use who if it can be replaced with he/she. I hope this helped!
Romeo's tragic flaw is his impetuosity, his rashness of action before thinking thoroughly. You would want to look for examples of this behavior. I hope my answer has come to your help. God bless and have a nice day ahead!