1. "How long have you lived here?"
  2. "Why hasn't she replied to the email?"
  3. "What have they done to fix the problem?"
  4. "Where have you traveled this year?"
  5. "Who has taken my charger?"
  6. "Why have we not heard about this before?"
  7. "How many times have you seen this movie?"
  8. "What hasn't he completed his part of the project?"
  9. "Who have you spoken to about the issue?"
  10. "Why hasn't it stopped raining?"
  11. "How have you improved your skills?"
  12. "When have they decided to leave?"
  13. "Why haven't you called me?"
  14. "What have you learned from this experience?"
  15. "Where haven't you visited in the city yet?"
  16. "Who has inspired you the most?"
  17. "Why have they postponed the meeting?"
  18. "How long have you been waiting for a response?"
  19. "What haven't you tried at the new restaurant?"
  20. "Who hasn't given their feedback on the presentation?"