Crossword whit superlative form

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Across
  1. 4. what is the highest mountain in south América?
  2. 5. what is the largest planet in the solar system?
  3. 7. what is the hardest lenguage in the world?
  4. 8. what is the smallest City in Brazil?
  5. 9. What is the oldest tree in the world?
Down
  1. 1. what is the largest organ in the human body?
  2. 2. What is the most dangerous disease in the world?
  3. 3. What is the smallest country in the world?
  4. 6. what is the largest land animal in the world?
  5. 10. What is the most consumed food in the world?