O2 Themed Crossword

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Across
  1. 4. Sophisticated timepiece
  2. 5. To resupply
  3. 8. Large cats
  4. 9. Most important
  5. 12. A roundish fruit
  6. 13. A bionic person
  7. 14. Portable sound receivers
  8. 16. More than necessary(plural)
  9. 17. Place of business
  10. 18. To use again for a new purpose
  11. 19. Master/Mentor
Down
  1. 1. Medical pill
  2. 2. To be backed personally or financially
  3. 3. The grounds of a college
  4. 6. To make better
  5. 7. Portable telecommunications device
  6. 10. Your oxygen
  7. 11. A system of stars
  8. 15. Narrator