My crossword

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Across
  1. 4. synonym of invent, imagine
  2. 5. look for something unknown
  3. 7. synonym to expose, show, exhibit
  4. 8. work done by a person
Down
  1. 1. is in charge of the qualification
  2. 2. trace signs, words or numbers
  3. 3. elements to solve a task
  4. 6. acquire knowledge