Many students believe that the choice of their universities and courses should their own

问题补充：

Many students believe that the choice of their universities and courses should their own interest.

A. base in

B. base on

C. be based in

D. be based on

答案：

A. base in

B. base on

C. be based in

(答案→)D. be based on

解析：考查固定短语。be based on基于… base…on…使…基于…。故答案为D。