4Berne, J. E. 2004. Listening comprehension strategies: A review of the literature [J]. Foreign Language Annals, 37 (4): 521-531.
5Brindley, G. & Slatyer, H. 2002. Exploring task difficulty in ESL listening assessment [J]. Language Testing, 19 (4): 369-394.
6Buck, G. 2001. Assessing Listening [M]. Cambridge: Cambridge University Press.
7Carrier, K. A. 2003. Improving high school English language learners' second language listening through strategy instruction [J]. Bilingual Research Journal, 27 (3): 383-408.
8Ellis, R. 2006. Modelling learning difficulty and second language proficiency: The differential contributions of implicit and explicit knowledge [J]. Applied Linguistics, 27 (3): 431-463.
9Ellis, R., et al. 2001. Preemptive focus on form in the ESL classroom [J]. TESOL Quarterly, 35 (3): 407- 432.
10Field, J. 1998. Skills and strategies: Towards a new methodology for listening [J]. ELT Journal, 52 (2): 110-118.
