Zebua, B. A., Lumban Raja, V., & Ginting, F. Y. A. (2020). THE ABILITY OF THE SECOND YEAR STUDENTS OF SMP KATOLIK TRISAKTI 1 MEDAN IN USING VERB BE. Kairos English Language Teaching Journal, 1(3), 86–102. https://doi.org/10.54367/kairos.v1i3.715