8Bardovi-Harlig, K. & Bofman, T. Attinment of Sntactic and Morphological Accuracy by Advanced Langauge Learners. Studies in Second Language Acquisition, 1989. 11(1): 17-34.
9Belenky, M. F. Women's Ways of Knowing: The Development of Self ,Voice, and Mind(10th anniversary ed.)[M]. New York: Basic Books,1997.
10Cohen, A. Strategies in Learning and Using a Second Language[M].London: Longman, 1998.
