ZEBUA, B. A.; LUMBAN RAJA, V.; GINTING, F. Y. A. THE ABILITY OF THE SECOND YEAR STUDENTS OF SMP KATOLIK TRISAKTI 1 MEDAN IN USING VERB BE. Kairos English Language Teaching Journal, [S. l.], v. 1, n. 3, p. 86–102, 2020. DOI: 10.54367/kairos.v1i3.715. Disponível em: https://ejournal.ust.ac.id/index.php/KAIROS/article/view/715. Acesso em: 22 jul. 2024.