Ключевые слова: academic, asleep, blackboard, board, book, books, chalkboard, class, classroom, college, education, exam, examination, exams, exhausted, fatigue, girl, green, hardworking, high, hours, learn, learning, long, many, nap, napping, preparation, preparing, reading, research, revising, revision, school, science, sleep, sleeping, sleepy, smart, stack, student, study, studying, teacher, textbook, textbooks, tired, training, university, woman,