—What would you wish to do if you were a college student again?
—That's 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
网友回答
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。