Ключевые слова: academy, adult, audience, beautiful, blackboard, board, brunette, chart, class, classroom, college, diagram, drawing, educating, education, educator, explaining, handsome, happy, indoors, inside, intellectual, international, knowledge, learning, lecture, lecturer, lesson, male, material, occupation, person, presentation, professor, pupils, school, smiling, speech, standing, student, students, studying, task, teach, teacher, teaching, university, work, working, young,