Hard crossword Holiday

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Across
  1. 3. A green, white and red fruit.
  2. 5. Swim in the sea.
  3. 7. You put it on so as not to burn yourself.
Down
  1. 1. It starts when the holidays end.
  2. 2. When you don't work where are you?
  3. 4. They are balloons filled with water.
  4. 6. Naval transport.