—What would you wish to do if you were a college student again? —Thats very hard to say

问题补充：

—What would you wish to do if you were a college student again?

—Thats very hard to say, but I wish I when I was a college student.

A. has not studied biology

B. did study biology

C. had studied biology

D. studied biology

答案：

A. has not studied biology

B. did study biology

(答案→)C. had studied biology

D. studied biology

解析：本题考查wish后接宾词从句的用法。Wish后接宾词从句，从句的谓语动词要用虚拟语气，因为题干提示与过去事实相反，故用had done。