1All things are difficult before they are easy.凡事必先难后易。1. dress up2. in my opinion3. I dont think it is necessary to 4. make a decision5. hear about 6. seven-day festival7. be able to 8. get together9. in common10. give thanks for211. used to honour their ancestors12. a way to celebrate history13. believe in /believe14. on the last day of Kwanzaa15. dont have to =neednt16. the living; the dead17. look into the eyes18. remind sb of sth19. play tricks on20. take in 21. have no choice but to 3do