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

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：

A. Being separated

B. Having separated

(答案→)C. Having been separated

D. To be separated

解析：考查非谓语动词做状语。题中分词的动作发生在谓语动词之前，且与主语之间是被动关系，所以用现在分词完成式的被动式。所以选C 。