4Brandon L & Brandon K. Sentences,Paragraphs, and Beyond with Integrated Readings (7th ed. ) [ M]. Wad-sworth :Cengage Learning, 2014.
5de Beaugrande R & Dressier W. Introduction to Text Linguistics[ M] . London: Longman, 1981.
6Fellag R L. From Reading to Writing[ M] . Longman, 2010.
7Krashen S D. Principles and Practice in Second Language Acquisition[ M]. Oxford: Pergamon, 1982.
8Krashen S D. The Input Hypothesis: Issues and Implications[ M]. New York: Longman, 1985.
9McCarthy M & Carter R. Language as Discourse : Perspectives for Language Teaching[ M] . Routledge, 1994.
10Swain M & Lapkin S. Problems in output and the cognitive processes they generate: A step towards second lan-guage leaming[ J]. Applied Linguistics, 1995,16: 371-391.