问题补充:
Can you think of some cases drivers obviously knew the traffic rules but did not obey them.
A. which
B. as
C. where
D. that
答案:
A. which
B. as
(答案→)C. where
D. that
解析: 考查定语从句的关系词。先行词是some cases,后面从句drivers obviously knew the traffic rules but did not obey them缺少状语,当case,situation,position,condition等这类抽象名词作先行词,且后面定从缺少状语时,定从通常用where引导。所以选C。