Ключевые слова: adolescence, adolescent, answer, asian, back, blackboard, boys, chengdu, chess, child, china, chinese, class, classmates, classroom, closeup, concept, course, crowd, desk, diligence, education, exam, female, girls, group, high, highschool, indoors, knowledge, learning, lesson, male, middleschool, pupil, question, rear, rearview, school, sitting, studying, teacher, teenage, teenagers, teens, together, trainee, training, young, youth,