Ключевые слова: acting, adult, advice, audience, back, board, business, businessman, center, chair, classroom, communications, conferance, conference, congress, convention, crowd, education, group, hall, instructor, internation, learning, lecture, listening, male, man, meeting, office, orator, people, person, presentation, rear view, room, seat, seminar, sit, speaker, students, studying, table, teaching, training, work,