Ключевые слова: alarm, back, background, bell, blank, book, bookshelf, brick, business, clock, collection, concepts, copy, cover, deadline, document, education, exam, expertise, group, heap, homework, ideas, image, information, intelligence, learning, library, literature, metal, minute, nobody, objects, page, paper, pencil, pile, reading, red, research, row, school, space, stack, studying, textbook, time, timer, watch, wisdom,