Super Memo Crossword

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Across
  1. 3. Need no driver
  2. 6. Old, from a very long time ago
  3. 8. Not harmful to the environment, or trying to help the environment
  4. 10. Extreme surprise
  5. 11. High-speed transportation system
  6. 12. The appearance of the sky in the evening before the sun goes down
  7. 14. Hanoi is the ... city of Viet Nam
  8. 15. Where the royalty lives or to protect someone important
Down
  1. 1. A black and white bird that cannot fly but uses its small wings to help it swim
  2. 2. A large area of land, especially in relation to its appearance
  3. 4. Another word for "sun"
  4. 5. Can be used and easily replaced
  5. 7. The shape of the land next to the sea
  6. 9. The place something comes from or starts at
  7. 13. Having or producing a comfortably high temperature, although not hot