Ключевые слова: advertising, answer, ask, asking, background, blue, bubble, challenge, check, children, color, competition, concept, design, education, exam, flat, friends, fun, game, green, help, idea, information, intellectual, joy, lay, lesson, mark, marks, message, nobody, object, paper, play, question, questioning, quiz, researching, school, search, sheet, signs, speech, symbol, teamwork, test, top, view, word,