The aim of this study is to shed light on the learnability regarding usages of three English articles ("a," "the" and zero) among Chinese EFL learners. To this end, three tasks were administered in a pool of 107 participants to examine the extent to which learners can accurately use articles across different semantic contexts as well as the effects of varying proficiency level and discourse mode on learners' article decisions. The results showed that both groups (Group Low and Medium) in this study were likely to commit few errors with respect to article usages that target definiteness and specificity than those in zero-licensing contexts. In addition, inconsistent findings were observed regarding the effect of proficiency level on the variability in learners' article choices. Though significant differences were observed between two discourse modes (exposition and argumentation), it is claimed that NP-licensing contexts rather than shift of discourse mode play a major role in explaining the variances in the accurate use of articles. Furthermore, the findings in the present study will also inspire pedagogical implications.