1Barnes D.Language in the secondary classroomLanguage the Learner and the School,1969.
2Orstein A C.Strategies for effective teaching,1995.
3Long,M.“Native Speaker/non-native speaker Conversation in the second language classroom”[].On TESOL‘:Pacific Perspectives on Language Learning and Teaching.1983
4Nunan,D.Language Teaching Methodology: A Textbook for Teacher[]..1991
5YinJing.Instructional Strategies in questioning:A study in ESP Course[]..2000