1Candlin, C. N. Towards Tasked-based Language Learning [C]//C. N. Candlin and D. Mruphy. Language Learning Task. Englewood cliffs, NJ :Prentice Hall, 1987.
2Ellis, R. Learning a Second Language Through Interaction [M]. Amsterdam: John Benjarmins, 1999.
3Howatt, A. P. R. A History of English Language Teaching [ M]. Oxford: Oxford University Press, 1984.
4Long, M. H. Input, Interaction and Second Language Ac- quisition [ C ]/! H. Winitis. Native Language and Foreign Language. New York : Acquisition Annals of the New York Academy of Science, 1981.
5Nunan, D. Design Tasks for the Communicative Classroom [ M ]. Oxford : Oxford University Press, 1989.
6Prabbu, N. S. Second Language Pedagogy[ M ]. Oxford : Oxford University Press, 1987.
7Skehan, P. A Cognitive Approach to Language Learning [ M]. Oxford: Oxford University Press, 1998.
8Willis, J. A Framework for Task-based Learning[ M]. Hatlow: Longman, 1996.
