单选题 Giorgio, now fifteen, and Lucia, also in her teens, were reaching the ______ of their adolescence.(2005年中国科学院考博试题)
【正确答案】 A
【答案解析】解析：本题空格处是说“到了他们的青春转折期”。crisis“决定性时刻，危机”符台题意。其他三项“criterion(批评判断的)标准，准则，规范；causality因果关系；credibility可信性”都不正确。