from other continents for millions of years Australia has many plants and animals not fou

问题补充：

from other continents for millions of years,Australia has many plants and animals not found in any other country in the world.

A Being separated B Having separated C Having been separated D To be separated

答案：

解析： 考查非谓语动词作状语。短语be separated from 与什么分开，Australia与separate之间是被动关系，且分词的动作发生在谓语动词之前，故用现在分词的完成式。所以选C。