Chinese lesson 2,3

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Across
  1. 2. to help
  2. 4. measure word for long
  3. 6. street
  4. 8. class
  5. 9. optional courses
  6. 10. to ride
  7. 14. high school
  8. 15. difficult
  9. 17. english
  10. 19. another, other
  11. 20. math
  12. 21. martial arts
Down
  1. 1. to choose
  2. 2. required courses
  3. 3. ahead
  4. 5. bicycle
  5. 7. don't worry
  6. 11. to go to school
  7. 12. to take a bus
  8. 13. to have
  9. 16. history
  10. 18. straight