Aboriginal （土著居民）is a term to describe the people living in a place from the earliest ti

问题补充：

Aboriginal （土著居民）is a term to describe the people living in a place from the earliest times or before European arrived .

A. used ; knowing

B. used ; known

C. using ; known

D. using ; knowing

答案：

A. used ; knowing

B. used ; known

(答案→)C. using ; known

D. using ; knowing

解析：考查分词做定语，第一空用be used to do被用来做…,term和use是被动关系，用过去分词，第二空known修饰time，因为know和time也是被动关系，句意是：土著居民是一个名词，被用来描述从最早的人们知道的时间或在欧洲人来之前就住在一个地方的人们。选C。