Ключевые слова: academic, background, check, class, college, course, day, different, education, exam, examination, final, flat, grade, graduate, green, group, institute, keyboard, knowledge, lay, learn, learning, lesson, many, message, note, numbers, object, paper, passing, pen, phrase, preparation, question, ready, red, school, sharpener, stationery, sticky, stress, student, studying, success, test, text, top, university, view,