Ключевые слова: academic, academy, background, black, board, business, campus, chair, chalk, class, classroom, colleauge, college, conference, curtain, desk, education, empty, exam, examination, furniture, grade, hall, indoor, inhabited, inside, institute, interior, knowledge, learn, lecture, lesson, meeting, multimedia, nobody, presentation, quiz, room, school, seat, seminar, study, table, test, training, university, whiteboard, window, wood, work,