the first three hypotheses described in the section 3.3 are mostly demonstrated by the results of this qualitative research. Proficient students meet each of the following conditions: they have (1) high motivation, (2) clear study goals, and (3) career goals. However, the fourth hypothesis that is proficient students try to improve all of their English skills does not seem to be proved in this study. The subjects of this study are likely to prefer auditory or visual-based English input activities in contrast to more production based activities such as writing and speaking. Additionally, some of them had not made sufficient effort to build their vocabulary. A couple of them just relied solely on reference books.