Building found within a community

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Across
  1. 3. sell gas and oil
  2. 4. sell food and drinks
  3. 7. students
  4. 8. mail delivery
  5. 9. books
Down
  1. 1. money
  2. 2. a fire fighter
  3. 4. sell cloth and shoes
  4. 5. a police officer
  5. 6. hekping the residents