Singular and plural nouns

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Across
  1. 2. plural of fairy
  2. 4. singular of books
  3. 10. plural of spy
  4. 11. plural of country
  5. 14. singular of boxes
  6. 15. singular of sweets
  7. 16. plural of house
  8. 17. singular of flies
Down
  1. 1. plural of kangaroo
  2. 3. singular of apples
  3. 4. plural of batch
  4. 5. plural of dish
  5. 6. singular of wishes
  6. 7. plural of light
  7. 8. plural of bus
  8. 9. singular of strawberries
  9. 12. singular of stories
  10. 13. singular of foxes