%0 Conference Paper %B Intelligent Tutoring Systems. %D 2004 %T A learning environment for english for academic purposes based on adaptive tests and task-based systems %A PITON-GONÇALVES, J. %A ALUISIO, S. M. %A MENDONCA, L. H. %A NOVAES, O. O. %B Intelligent Tutoring Systems. %I Springer Berlin Heidelberg %G eng