1BEEBE, L. M. Input: Choosing the right stuff [A]. In S. M. Gass& C. G. Madden (Eds.), Input in Second Lan guage Acquisition [C]. Rowley, MA: Newbury House. 1985: 404--414.
2MITCHELL, R. , MYLES, F. Second Language Learning Theories [M]. London: Arnold, 1998.
3YOUNG, R. Sociolinguistic approaches to SLA[J]. Annual. Review of Applied Linguistics, 1999,19 (1) : 105-- 132.
4LANTOLF, J.P. Sociocultural theory and second language learning [J]. Modern Language Journal, 1994, 7(3) : 418-- 420.
5VYGOTSKY, L. S. Denken und Sprechen [Thinking and speaking] [M], Berlin: Akademie-Verlag. West German li cerise edition: Stuttgart: S. Fischer, 1964.
6LEONT'EV, A. N. The problem of activity in psychology [A]. In J. V. Wertsch (Ed.), The Coneeptof Activity in Soviet Psychology[C]. Armonk, NY: M. E. Sharpe, 1981: 37--71.
7LANTOLF, J. P. , APPEL, G. Theoretical framework: An introduction to Vygotskyan perspectives on second language research[A]. In J. P. Lantolf & G. Appel (Eds.), Vygotskyan Approaches to Second Language Research [C]. Norwood, NJ: Ablex, 1994:1--32.
8OCHS, E. Linguistic resources for socializing humanity[A]. InJ. J. Gum-perz & S. L. Levineon (Eds.),Rethin- king Linguistic Relativity[C]. New York: Cambridge University Press, 1996:407--437.
9KASPER, G. Classroom research on interlanguage pragmatics[A]. In K. R. Rose & G. Kasper (Eds.), Pragni- aties in Language Teaching[C]. New York: Cambridge University Press, 2001:33 60.
10BLUM-KULKA, S. Dinner Talk[M]. Mahwah, NJ: Erlbaum, 1997.
