I know him a good football player while in college.A. to have beenB. to beC. wasD. had be

问题补充：

I know him a good football player while in college.

A. to have been

B. to be

C. was

D. had been

答案：

(答案→)A. to have been

B. to be

C. was

D. had been

解析：考查时态。句意“我知道她在大学时是一个出色的足球运动员。”know和be有先后关系，故用完成时。故选A。