Hard crossword Holiday

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