water flush

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Across
  1. 3. most usual nature?
  2. 4. a bad weather?
  3. 5. how to make chocolate?
Down
  1. 1. has 20% of air in it?
  2. 2. what bear eats bamboo?
  3. 5. where does rain come from?
  4. 6. the most usual brown fured animal?