Detective Lesson 1: solve these riddles!

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Across
  1. 1. What goes up and down but cannot walk?
  2. 4. What follows you all the time and copies you, but you can't catch it?
  3. 5. What has a head and a tail but no body?
  4. 6. What fruit needs to be cheered up?
Down
  1. 2. What gets wet while drying?
  2. 3. What has four legs but cannot walk?
  3. 7. What has to be broken before you can use it?
  4. 8. What has a foot but no legs?