问题补充：
Life is like a long race we compete with others to go beyond ourselves．
A. which
B. what
C. that
D. where
答案：
A. which
B. what
C. that
(答案→)D. where
解析：考查定语从句。先行词是a long race“一次长跑”，定语从句不能用what引导，排除B；which和that都能指物，作主语或宾语；定语从句不缺少成分，故不用which或that。a long race指地点，故用where引导。故选D。
