2Barnes D.Language in the secondary classroom[].Language the Learner and the School.1969
3Long M H,Sato C J.Classroom Foreigner Talk Discourse: Forms and Functions of Teachers’ Questions[].Classroom Oriented Research in Second Language Acquisition.1983
4Barnes,D. From communication to curriculum . 1976
6Barnes D. Language in the Second Classroom[M].Harmondsworth:Penguin,1969.
7Long,M.H,Sato,C.J. Classroom Foreigner Talk Discourse:Forms and Functions of Teachers''''Questions[A].Rowley Mass:Newbury House,1983.
8Ur Penny. A Couse in Language Teaching--Practice and Theory[M].Cambridge:Cambridge University Press,1999.
9Liu G. Interaction and Second Language Acquisition:A Longitudinal Study of a Child''''s Acquisition of English as a Second Language[M].Beijing:Beijing Language Culture University Press,2000.
10Brown,H.D. Teaching by Principles[M].Pearson Education,Inc,1994.164-169.
