I know a little bit about the city as I there for one year in my youth.A. am studyingB. h

问题补充：

I know a little bit about the city as I there for one year in my youth.

A. am studying

B. had studied

C. studied

D. have studied

答案：

A. am studying

B. had studied

(答案→)C. studied

D. have studied

解析：考查时态。句意：在我年轻的时候我在那学过一年所以对这个城市我知道一点。根据语境学习的动作在过去，所以用一般过去式，选C。