unit 1 word cell crossword

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Across
  1. 4. to cut into 2 parts
  2. 5. three
  3. 6. 1,000,000,000
  4. 7. 1-wheeled vehicle
  5. 9. 2 languages
  6. 10. 3 sided, 3 angled shape
  7. 12. one side
  8. 14. 1 language
  9. 15. one;single
  10. 16. 2-winged airplane
  11. 17. an animal with 1 horn
  12. 18. 3 legged support
Down
  1. 1. every 200 years
  2. 2. twice a year
  3. 3. two
  4. 4. 2 legged support
  5. 5. 3 languages
  6. 8. 3 sided
  7. 11. lasting 2 years
  8. 13. 1,000,000,000,000
  9. 15. to make one
  10. 17. one legged support