This passage is mainly about____．

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

A．they followed their own greeting customs
B．they were not used to the strange atmosphere
C．they couldn’t speak each other’ S language
D．they had never met each other before