Ключевые слова: book, books, boy, caucasian, cheerful, collage, collection, college, compilation, composite, exam, graduating, happiness, happy, hardworking, holding, homework, isolated, knowledge, learn, learning, lesson, lifestyle, man, many, montage, notes, poses, preparation, preparing, reading, school, science, set, smart, stack, student, study, studying, teen, teenager, textbook, university, variation, various, white, young,