Write the plural for each word and solve the crossword puzzle.

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Across
  1. 3. boat
  2. 6. bus
  3. 8. tooth
  4. 9. pen
Down
  1. 1. glass
  2. 2. fish
  3. 3. box
  4. 4. baby
  5. 5. cat
  6. 7. cup