Our school held a respect-parent activity last month, our students benefited a lot.
A. when
B. where
C. which
D. that
网友回答
A. when
(答案→)B. where
C. which
D. that
解析：考查定语从句的关系词。先行词是a respect-parent activity，代入定语从句应是our students benefited a lot from the respect-parent activity，句子缺少地点状语，所以选B。