单选题 The role of American women______significantly from the time the nation was born, to the modern era of the 1950s and 1960s.
【正确答案】 D
【答案解析】解析:语法知识。考查时态。句中提及美国女人的角色在二十世纪五六十年代已经改变了,表示当时已经完成的动作,故应该用过去完成时表达,再考虑到role与change之间应为被动关系,故答案为D。