Young detectives(1,2)

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Across
  1. 2. ___________ is difficult to understand.
  2. 4. A_______ is something that helps solve a problem or a mystery.
  3. 6. not allow to come near
  4. 8. A_______ is a kind of clue. You can find it on the soft ground.
  5. 9. A_________ is someone who works to gather information and solves a certain mystery.
Down
  1. 1. A________explains something that is a secret, not clear, or difficult to understand.
  2. 3. to be careful
  3. 5. to try to find
  4. 7. to discover