4Krashen. S. 1987. Principles and Practice in Second Language Acquisition [M]. Hertfford-shire: Prentice Hall International (UK) Ltd, 21-25.
5Olson, D. R. 1998. Mind and media: The epistemic function of literacy [J]. Journal of Communications, (38): 27-35.
6Parry, K. (Ed). 1988. Culture, Literacy, and Learning English: Voices from the Chinese Classroom [C]. Portsmouth, NH: Hoinemann.
7Pennycock, A. 1996. Borrowing other's words: Text, ownership, memory, and plagiarism [J]. TESOL Quarterly, (30): 201-230.
8Sinclair, J. M. 1991. Corpus, Concordance, Collocation [M]. Oxford: Oxford University Press.
9Swain, M. 1985. Communicative competence: Some roles of comprehensible input and comprehensible output in its development [A]. In C. Madden (ed.) Input in Second Language Acquisition [C]. Rowley: New- bury House, 235-253.