3Cook, G. "Language play, language learning,"[J] Language Teaching Journal, 1997,51 (3) .. 224-- 31.
4Cook, G. Language Play, Language Learning[M]. Oxford University Press, 2000.
5English Oxford Krashen, ~Comprehensible Input and Some Competing Hypot-heses'[C], paper presented at the Conference of Comprehen- sion- based Learning and Teaching of Second Languages, Ot- tawa, May, 1989.
6McLaughlin B. , Rossman, R. and McLeod, B. , ' Second Lan- guage Learning: an Information--processing Perspective' [J]. Language Learning, 19 8 3,3 3 ~ 13 5 -- 5 8.
7Tarone, E. "Getting serious about language play: language play, interlanguage variation and second language acquisition," in B. Swierzbin, F. Morris, M. E. Anderson, C. Klee, and E. Tarone (eds): Social and Cognitive Factors in Second Language Acquisi- tion: Selected Proceedings of the 1999 Second Language Research Forum[-C]. Somerville, MA: Cascadilla Press, 2000:31--54.
8Johnson DW,Johnson RJ,Hulubec,EJ.Circles of Learning:cooperation in the classroom. . 1990
