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Across
  1. 3. useful advice
  2. 4. insignificant
  3. 8. support eachother
  4. 9. children presume suppose
Down
  1. 1. obvious
  2. 2. acrobatic exercise
  3. 3. sociable
  4. 5. get involved
  5. 6. deep knowledge
  6. 7. brother or sister