4Allwright, D. and K. Bailey. Focus on the Language Classroom: An Introduction to Classroom Researchfor Language Teachers [M]. Cambridge: CUP, 1991: 121.
5Allwright, D. and K. Bailey. Focus on the Language Classroom:An Introduction to Classroom Research for Language Teachers [ M ]. Cambridge:CUP, 1991 : 121.
6Bachman, L. F. Fundamental considerations in language testing [ M ] . Oxford, UK:Oxford University Press. 1990.
7Weir, C. J. Communicative Language Testing [M] . UK: Prentice Hall International. 1990.