1Widdowson, H.G. Teaching Language as Communication. [ M ].Oxford: Oxford University Press. 1978:67- 69.
2Canale, M. & Swain, M. "Theoretical bases of communicative approaches to second language teaching and testing". [J]. Applied Linguistics, 1980 (1): 1 - 47.
3Faerch, C. & G. Kasper. Strategies in Interlanguage Communication[M]. London: Longman, 1983:15- 19.
4Paribakht, T. "Strategic competence and language proficiency".[J]. Applied Linguistics, 1985 (6): 132- 146.