39．This passage is mainly about____． A．cultural invasion B．the understanding of customs C．business talks D．differences in handshakes

38．Paragraph 4 tells us that when visiting a foreign country,____. A．it is very uncommon for one to encounter embarrassing situations B．it is hard for one to adapt to the material aspects of life there C．people often expect tO meet differences in customs D．people expect the same kind of food and weather