A Glass of Milk

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Across
  1. 1. To find the cause of a problem
  2. 4. The terrible feeling of hunger
  3. 7. Being well thought of
  4. 9. To release
  5. 11. Not to be lucky
  6. 13. Hard work
  7. 14. Expert in a particular field
Down
  1. 2. The shaking of body in small movements
  2. 3. A bundle of paper with lots of information
  3. 5. A feeling of shock
  4. 6. The act of pausing with uncertainty
  5. 8. Very puzzled
  6. 10. Intelligent
  7. 12. Well-known
  8. 15. To feel sick