Singular to Plural Crossword

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Across
  1. 2. Knives
  2. 3. Deer
  3. 5. Rivers
  4. 6. Spies
  5. 9. People
  6. 13. Tomatoes
  7. 14. Wishes
  8. 16. Classes
  9. 17. Houses
Down
  1. 1. Wives
  2. 3. Doors
  3. 4. Daisies
  4. 7. Parks
  5. 8. Teeth
  6. 10. Loaves
  7. 11. Feet
  8. 12. Fish
  9. 15. Sheep