word puzzle

12345678
Across
  1. 2. An underground railway system in a city.
  2. 6. You can see robots there.
  3. 7. At a red light.
  4. 8. You can see a film there.
Down
  1. 1. You can buy different things in it
  2. 3. You can buy books there.
  3. 4. You can look up new words with it.
  4. 5. You can send letters or postcards there.