Ключевые слова: blank, blank screen, book, bookcase, bookshelf, bookstore, caucasian, choice, choosing, close, college, concept, copy, digital, education, generic, grab, green screen, hand, holding, human, indoor, information, internet, knowledge, learn, library, modern, person, picking, pupil, school, select, shelf, stack, student, study, studying, swipe, tablet, take, technology, textbook, touch, university, user, variation, working,