1H. Douglas Brown. Teaching by Principles:An Interactive ApproachtoLanguagePedagogy[M].北京:外语教学与研究出版社,2001:68.
2Van Ek ,J. A. , Alexander, L. G. Threshold Level English [ M ]. Per- gamon Press 1975.
3Higgs, Theodore, and Clifford, Ray. "The Push Toward Communica- tion" In Higgs, Theodore ( Ed ) , Curriculum, Competence, and the Foreign Language Teacher [ M ], Lincolnwood, IL : National Text- book Company: 1982.
4David Nunan, Communicative tasks and the language curriculum [ J ]. TESOL Quarterly 1991 a,25 ( 02 ) .