Question

Our school held a respect-parent activity last month, ______ our students benefited a lot

1. A.
   when
2. B.
   where
3. C.
   which
4. D.
   that

Answer 1

B
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。