1Beaugrande & Dressier. Introduction to Text Linguistics [M]. Longman, 1985
2Hallida, y, M,A.K, &Hasan,R. (2001) Cohesion in English, Beijing. Foreign La, nguage Tea, ching a, nd Research Press. (Original work published in 1976)
3Richards, J. C, Platt, J. &Platt H. Longman Dictionary of language Teaching&Applied Linguistics [ M ]. London: Long- mart/Beijing Foreign Language Teaching and Research Press, 1992/2000.
