Ключевые слова: 20s, 5 year old, 6 year old, assignment, blackboard, book, boy, child, children, chinese, class, classroom, desk, education, elementary, female, girl, group, happy, homework, hong kong, learning, male, people, primary, pupil, reading, school, sitting, smiling, standing, student, studying, teacher, teaching, twenties, uniform, vertical, woman, women, working,