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
网友回答
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。