5Brown, H.D. Principles of Language Learning and Teaching[M]. Longman Inc.,2000.
6Canale, M. and M. Swain. Theorectical basis of communicative approaches to second language teachig and testing [ J]. Applied Linguistics, 1980 (1) : 1-47.
7Ellis, R. Understanding Second Language Acquisition[M]. Oxford University Press, 1985.
8Harmer, J. The Practice of English Language Teaching [M].New York:Longman Inc.,1983.
9Howatt, A. P. R. A History of English Language Teaching[M].Oxford University Press, 1984.
10Stern, H.H. Perspectives on Second Language Teaching[M].Toronto: Ontario Institute for Studies in Education, 1970.
