Ключевые слова: academic, academy, adult, background, blackboard, business, caucasian, class, classroom, college, communication, confident, copy, course, department, education, educational, explain, explaining, female, giving, happy, intelligence, knowledge, learn, learning, lecture, lesson, occupation, pens, person, portrait, profession, professional, school, smart, smiling, space, standing, study, teach, teacher, text, training, tutor, university, woman, work, young,