Singular and plural nouns

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Across
  1. 1. plural of car
  2. 3. plural of cat
  3. 6. plural of paper
  4. 8. singular of desks
  5. 9. singular of pencils
Down
  1. 1. plural of chair
  2. 2. plural of paper
  3. 4. singular of books
  4. 5. singular of apples
  5. 7. plural of table