5[5]Doughty,C.1991.Second language instruction does make a difference:Evidence for an empirical study of SL relativization[J].SSLA 13:431-496.
6[6]Ellis Rod,1994,The study of Second Language Acquisition[M].Shanghai:Shanghai Foreign Language Education Press.
7[7]Harley,B.,& Swain,M.1984.The interlanguage of immersion students and its implications for second language teaching[A].In A.Davies,C.Criper,& A.Howatt (Eds.),Interlanguage.Edinburgh:Edinburgh University Press.
8[8]Long,M.1983.'Does second language instruction make a difference? A review of research'[J].TESOL Quarterly 17 (3):359-82.
9[9]Long,M.1988.Instructed interlanguage development[A].In Beebe,L (ed.) Issues in second language acquisition:multiple perspectives,pp.115-41.Newbury House,Cambridge,Mass.
10[10]Nunan David.2001.Second Language Learning and Teaching[M].Beijing:Foreign Language Teaching and Research Press.