Dr Dolittle crossword

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Across
  1. 4. A large area of tree similar to a forest
  2. 5. Someone who helps sick people
  3. 6. A large boat
  4. 8. An animal that swings between trees
Down
  1. 1. A small house or building
  2. 2. A cure to anyone or anything sick
  3. 3. A continent that has wild giraffes
  4. 7. A long time of travelling in sea