Singular Vs Plural (Nouns)

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Across
  1. 2. A BALLOON
  2. 3. A FAMILY
  3. 4. AN APPLE
  4. 7. A TREE
  5. 8. A PARTY
  6. 9. A CAT
Down
  1. 1. A BOX
  2. 2. A BEACH
  3. 5. AN EGG
  4. 6. A FRIEND