He told me that he would remember the days in Beijing University forever he got much help there from Professor Zhu.
A. where
B. which
C. that
D. when
网友回答
A. where
B. which
C. that
(答案→)D. when
解析：考查定语从句。先行词the days in Beijing University为下文的逻辑时间状语，故引导词用when，选D。