题目

根据父系血缘关系的亲疏确定政治等级、巩固国家统治的制度是 A.禅让制          B.分封制            C.宗法制                     D.郡县制 答案：C—Be careful not to drop the Tang Dynasty vase .      —Yes , we can’t be            .        A．too careful      B．very careful     C．too careless     D．careless enough