Terka, B. 2021. The way of testing the level of mastery of the polish verb aspect in the state certificate examinations in polish as a foreign language at the B1 level in the light of new research on perfectiveness/imperfectiveness of verbs . Acta Universitatis Lodziensis. Kształcenie Polonistyczne Cudzoziemców. 28, (Dec. 2021), 47–58. DOI:https://doi.org/10.18778/0860-6587.28.03.