4Willis.J.A flexible framework for task-based leaming.in Willis, J.& Willis,D.Challenge and Change in language teaching[M]. Macmllian Publishers Limited:UK,1996.
5Ellis,lK.Task-based Language Learning and Teaching [M]. Oxford University Press:Oxford,2003.
6Hu,G.W.Contextual influences on instructional practices:a Chinese case for an ecological approach to ELT[J].TESOL Quarterly,2005,(39):635-660.
7Carless,D.The suitability of task-based approach for secondary schools :perspectives from Hong Kong[J].System,2007a,(35): 595-608.
8Klapper,J.Taking communication to task.A critical review of recent trends in language teaching[J].Language Learning Journal,2003,(27):33-42.
9Carless,D.Student use of the mother tongue in the task- based classroom[J].ELT Journal Volume,2007b,(4).
10CREES,R.TBLT or not TBLT that is the question.19th Annual EA Education Confererence,2006.