Ключевые слова: advertisement, background, banner, book, business, class, closeup, communication, computer, concept, course, development, draw, educate, education, german, germany, home, internet, knowledge, language, learn, learning, lesson, lessons, office, online, read, school, sign, speak, student, study, studying, success, symbol, teach, teaching, text, tourism, training, translate, understand, university, webinar, website, word, working, workplace, writing,