5[5]Paul Garland.Assessment in GNVQs:Learning the hard way [J].Research in Post-compulsory Educa tion.Vol.3,No.3,1988.329-344.
6[6]Yvonne Hillier.Higher.Level National Vocational Qualifications:the candidates'experience [J].JournalofVocational Education and Training.Vol.51,No.2,1999.199-224.
2Krashen.S.D.The Input Hypothesis. Issues and Implications [M]. London:Longman,1985.
3Swain M,Three Functions of output in second language lcanting [A]. In C Cook & B Seidhhofer (eds),Principles and Practice in Applied Linguistics:Studies in Honour of H G Widdowson[C].Oxford:Oxford University Press,1995.125-144.
