With our knowledge practice we can make contributions to our society.A. to base onB. bas

问题补充：

With our knowledge practice, we can make contributions to our society.

A. to base on

B. basing on

C. based on

D. base on

答案：

A. to base on

B. basing on

(答案→)C. based on

D. base on

解析：考查非谓语动词作后置定语。our knowledge和base on之间是动宾关系，base sth on sth，要用过去分词based on。选C。