Calles-Jiménez, R. F.; Paredes-Peralta, D. C.; Aguirre-Alarcón, C. A.; Camacho-Oleas, M. E. Communicative Activities in the Development of Oral Competence in Ecuadorian Students Compared to the Cambridge Key Exam. REV CIENC SOC-VENEZ 2024, 30, 19-34.