21. You have to ______(答应) me you won’t do that again.

20. Many great ____ (工程) are being built for the 29^th Olympic in Beijing.

19. It is __________(传统) for Chinese to make jiaozi on New Year’s Eve.

18. Are you familiar with the ____ (公司) run by the foreigner?

17. The country’s _______ (自然) resources includes forests, cool and oil.

16. My parents hope this success will _______(激励)me to greater efforts.

15. It is the guide’s duty to _____(陪伴) visitors around the landscape.

14. If people want to live long, they need healthy food, as wellas clean and ______(新鲜) air.

13. The professor was always careful and _____(严谨) in his work.

12. There are many different festivals to _____(庆祝).