单项选择题
A．convenience B．practical necessity C．fancy of a pop star D．cold weather
A．happening in a regularly repeated order B．happening according to the latest fashion C．fixed D．changeable
A．We could ignore appearance in informal situations. B．We should always follow the latest fashion. C．We should care about appearance in formal situations. D．Present-day society is much freer and easier because it emphasizes uniformity.