Ключевые слова: ad, analyzing, audit, background, book, bookmark, bookstore, business, circle, college, diary, discovery, education, empty, glass, group, homework, imagination, inspection, knowledge, lens, library, literature, looking for, magnification, magnifying, office, open, optical, page, paper, paperwork, practice, progress, publication, research, school, science, search, skill, spring, stack, stacking, strategy, studying, subjects, surveying, task, teamwork, text, web, white,