46. C 主旨大意题。本文主要介绍了巴西、新加坡、阿拉伯联合酋长国、瑞士四国的商务礼仪。故最佳答案是C项。
47. D 细节理解题。根据In Singapore中最后几句"Singaporeans are direct in their... For example... a higher rank"可知答案是D项。
48,B 细节理解题。根据In the United Arab Emirates中"When meetings are one-to-one, if your host offers you coffee, you should refuse."可知,当单独与主人见面的时候,不应该接受主人提供的咖啡,故答案是B项。
49. D 细节理解题。根据In Switzerland中的"The Swiss follow formal table manners. They also keep their hand visible, at the table..."可知答案选D项。