Ключевые слова: adults, back, background, blackboard, board, chair, chairs, chalkboard, class, classroom, coaching, college, conference, design, desk, desks, education, elementary, empty, exam, furniture, green, hall, high, indoors, inside, interior, knowledge, learn, lecture, lesson, modern, nobody, primary, room, school, seat, seminar, student, study, table, teacher, teaching, test, training, tutor, university, wall, wood, wooden,