5Anderson, J. Cognitive Psychology and Its Implications [ M ]. 2nd edition. New York, 1985.
6Harmer, J. The Practice of English Language Teaching[ M ]. Pearson Education Limited ,2001:246 - 250,302.
7Long, M. & P. Porter, Group-work, Inter-language Talk, and Second Language Acquisition [ J ]. TESOL Quarterly, 1985 : 19/1.
8Mclaughin, B. The Relationship Between First and Second Languages: Language Proficiency and Language Aptitude, in Birgit Harley et al. ( eds. ) The Development of Second language Proficiency[ C ].Cambridge University Press, 1990:158 - 173.
9Nunan, D. Syllabus Design[ M]. Oxford University Press, 1988:Chapter I.
10Nunan, D. Designing Tasks for the Class-room[M]. Cambridge University Press, 1988:3.
