7陈佑林.中国高校外语教学中的几个误区[J].Sino-US English Teaching,2003,(2).
8Crystal D. English as a Global Language [ M]. Cambridge University Press, 1997.
9Graddol D. The Future of English -- A Guide to Forecasting the Popularity of the English Language in 21st Century [ M ]. London : The British Council, 1997.
10Graddol D. The decline of the native speaker[J]. AILA Reviews 1999, 13:57 -68.
