Ключевые слова: academic, adolescent, answer, ask, audience, auditorium, blur, campus, casual, cheerful, class, classmate, classroom, clever, college, course, diligent, diverse, education, glad, group, hand raised, happy, horizontal, indoors, intelligent, knowledge, learn, lecture, lesson, multiethnic, multiracial, optimist, question, school, seminar, smart, smile, student, study, teen, teenager, together, university, young,