第29题: [单项选择]Advertising has its origin in ______. A. shop window displays and the wrapping of goods B. face to face contact between sellers and buyers C. the communicative capabilities of a trained salesperson D. articles in newspapers and magazines 参考答案:B 答案解析:由第二段最后一句话可知,广告来源于市场上买卖双方面对面的接触。