/BI/ AND /DU/ CROSSWORD

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Across
  1. 3. The 200th anniversary of an important event.
  2. 4. Involving two sides.
  3. 5. The muscles at the front of your upper arms that help you bend your elbows.
  4. 9. A tool with two eyepieces that helps you see things far away.
  5. 10. A piece of music performed by two singers or musicians.
Down
  1. 1. An aeroplane with two sets of wings, one above the other.
  2. 2. An animal or person that walks on two legs.
  3. 4. Able to speak and understand two languages.
  4. 6. A pair of two people who work or perform together.
  5. 7. A vehicle with two wheels that you pedal to move.
  6. 8. A fight or contest between two people.