5Kemp Jet al. Designing Effective Instruction [M]. New York: Prentice Hall Regents, 1998.
6Nunan D. Second Language Teaching and Learning [ M]. Beijing: Foreign Language Teaching and Research Press, 2001.
7Riehards J C et al. Longman Dictionary of Language Teaching and Applied Linguistics ( New Ed. ) [Z]. Beijing: Foreign Language Teaehing and Researeh Press, 2003.