Gig saw puzzle

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Across
  1. 2. The code to anything
  2. 4. From a cow
  3. 6. preparing for something
  4. 8. Breakfast food
  5. 9. A science
Down
  1. 1. To word on school for a long time
  2. 3. Morning Drink
  3. 5. Mans best friend
  4. 7. some thing a teacher assigns you