I often think of the days I took part in the military training with the soldiers has a

问题补充：

I often think of the days I took part in the military training with the soldiers, has a great effect on my studies.

A. which; that

B. that; which

C. when; who

D. when; which

答案：

A. which; that

B. that; which

C. when; who

(答案→)D. when; which

解析：考查定语从句。先行词是the days，定语从句不缺少成分，指时间用when引导定语从句；排除A、B；第二空是非限制性定语从句，指整个句子用which。故选D。