7Pica,T.,R.et al.Choosing and using communicative tasks for second language instruction.In G.Crookes and S.Gass(eds.),Tasks in a Pedagogical Context: Integrating Theory and Practice.Clevedon: Multilingual Matters.1993. 被引量:1
8Krashen,S.The Input Hypothesis: Issues and Implications. London: Longman.1985. 被引量:1
9Swain,M.Communicative competence:Some roles of comprehensible input and comprehensible output in development. In S.Gass and C.Madden (eds.),Input in Second Language Acquisition.Rowley, Mass.:Newbury House.1985. 被引量:1
10Nunan,David.Designing Tasks for the Communicative Classroom.Cambridge:CUP 1989. 被引量:1