3[3]Pica, T. Choosing and using communicative tasks for second language interaction[ A]. Grookes and Grass:Tasks and Language Learning[ C ]. Avon:Multilingual Matters, 1993.
4[4]Skehan, P. A framework for the implementation of task - based instruction [ J]. Applied linguistics, 1996,17:38 - 32.
5[5]Nunan, D. De signing Tasks for the Communicative Classroom [ M ]. Cambridge: CUP, 1989.
6[6]Skehan,P. A Cognitive Approach to Language Learning[ M]. Oxford: OUP, 1998.
7[7]Willis,J.A Framework for Task- based Learning[M] .London:Longman, 1996.
8[2]Pragmatics An Introduction Jacobl[M].Mey Blackwell Publishers Ltd.
9[3]How to Teach English Harmer,J[M].Foreign Language Teaching and Research Press.
10Cunningsworth, A .如何选择教材(Choosing Your Coursebook)[M].上海：上海外语教育出版社，2002．
