6H.G.Widdowson.Teaching language as Communication[M].Oxford University Press,1996.
7Jane Amold.Affect in Language Teaching[M].Cambridge University Press,1999
8Peter Skehan.A Cognitive Approach to Language Learning[M].Oxford:Oxford University Press,1998.
9Spada,N.Relationships between Types of Content and Type of Instruction:Some Effects on the L2 Proficiency of Adult Learners[J].Studies in Second Language Acquisition,1987(8).
