Ключевые слова: alarm, back, background, ball, blackboard, board, book, books, calculator, chalk, chalkboard, class, classroom, clock, college, concept, design, desk, educate, education, elementary, homework, knowledge, learn, library, literature, magnifier, nobody, notebook, old, pen, protractor, ruler, school, study, studying, table, textbook, texture, time, university, wood,