Around the world on the Number 7 train

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Across
  1. 3. A person who legally moves to another country.
  2. 5. A place where planes take off.
  3. 9. People who buy products at supermarkets or anywhere else
  4. 11. Containing too many people or things.
  5. 12. Something that is hard to do.
Down
  1. 1. A place that is long distanced.
  2. 2. Between countries.
  3. 4. A place where people study after they finished school.
  4. 6. A device used to play music.
  5. 7. See or feel somenthing.
  6. 8. A conflict between countries.
  7. 10. An outlying part of a city or town.