1Braidi,S..Re-examining the role of recasts in native- speaker/nnative-speaker interactions. Language Learning, 2002,52( 1 ), 1-42.
2Ellis,R.,Bastrukmen,H.,& Loewen,S..Learner uptake in communicative classroom. Language Learning, 2001,51: 281-318.
3Ellis,R.,Loewen,S.,& Erlam,R..Implicit and explicit corrective feedback and the acquisition of L2 grammar.Studies in Second Language Acquisition, 2006,28,339-365.
4Long,M..The role of the linguistic environment in sec- ond language acquisition.New York: Academic Press, 1996.
5Lyster,R.,& Ranta,L..Corrective feedback and learner uptake: Negotiation of form in communicative classroom.Stud- ies in Second Language Acquisition, 1997,20:37-66.