I still remember that terrible accident a few days ago, more than 20 pupils were killed.
A. where
B. that
C. on which
D. which
网友回答
(答案→)A. where
B. that
C. on which
D. which
解析：考察从句连词选择。该句为定语从句，先行词为accident，在从句中充当状语，where=in which
句意为我仍然记得几天前发生的事故，在事故中有二十多个学生死亡。