Ключевые слова: adult, answer, asking, caucasian, class, classroom, college, desk, education, female, friends, girl, group, hand, happy, high, horizontal, indoors, knowledge, learn, learning, lecture, lecturer, lesson, male, man, men, people, person, question, raising, school, sitting, smiling, student, students, study, studying, teacher, teaching, team, teamwork, teenage, teenager, together, university, woman, women, working, young,