3Nunan D. The questions teachers ask [ J ]. JALT, 1990, 12:2.
4White J & Lightbown P M. Asking and answering in ESL classes [ J ]. Canadian Modern Language Review,1984, 40.
5Tsui B M A. Analyzing input and interaction in second language classroom[J]. RELC, 1993, 16:1.
6Richard J & Lockhart C. Reflective Teaching in Second Language Classroom.~ [ M ]. Cambridge : Cambridge University Press, 1996.
7Nunan D. Language Teaching Methodology[M]. New York: Prentice Hall, 1991.
8Long M H & Sato C J. Classroom foreigner talk discourse: Forms and functions of teachers' questions[A]. H W Seliger & M H Long. Classroom Oriented Research in Second Language Acquisition[C]. Newbttry House, 1983.
9Brock C. The effects of referential question on ESL classroom discourse [ J ]. TESOL Quarterly, 1986, 20 : 1.
10Lynch T. Question roles in the classroom[J]. ELT, 1991, 41/2.
