[문 10 ～ 문 12] ※ 다음 글의 빈 칸에 들어갈 말로 가장 적절한 것을 고르시오. [문 10 ～ 문 12] Many years of trying to help people with every kind of trouble have left me with one sure conviction: The difficulty could have been overcome or might never have arisen if the people involved had just treated one another with common courtesy. "It's not so much what my husband says," a tearful wife tells me, "as the way he says it. Why does he have to yell at me?" A grim-faced office worker mutters, "I hate my boss. He never shows appreciation for anything." Human beings c o ur tesy. Courtesy, politeness, good manners － call it what you will － the supply never seems to equal the demand.