3Chalhoub-Deville, M. Issues in Computer-adap- tive Testing of Reading Proficiency [M].Cambridge: Cam- bridge University Press, 1999.
4Fulcher, G. Interface design in computer-based language testing[J].Language Testing,2005(4): 384-408.
5Rover, C. Web-based language testing Language [J].Learning & Technology,2001 (2): 84 - 94.
6Sawaki,Y.,Stricker,L.,& Oranje,A. Factor structure of the TOEFL Internet-based Test (iBT): Exploration in a field trial sample [R]. Educational Testing Service. TOEFL Research Report: 08-09. Revised November 2, 2008, from Http: //www.ets.org/Media Research/pdf/RR-08- 09.pdf.