3Little D. Learner Autonomy: Definitions, Issues and Problems [ M ]. Dublin : Authentik, 1991:2.
4Kohonen V. Experiential language learning: Second language learning as cooperative learner education [ M ].// Nunan D. Collaborative Language Learning and Teaching. Cambridge : Cambridge University Press, 1992:37.
5Holec H. Autonomy and Foreign Language Learning [ M]. Oxford: Pergamon Press,1981:3.
6Willis, J. A. Framework for Task - based Learning[ M]. London : Longman, 1996 : 173.
7Nunan D. Task - Based Language Teaching [ M ]. Cambridge : Cambridge University Press ,2004 : 1 - 4.
