We’ll talk about some cases drivers obviously knew the traffic rules but didn’t obey them.

问题补充：

We’ll talk about some cases drivers obviously knew the traffic rules but didn’t obey them.

A. where

B. whose

C. which

D. that

答案：

(答案→)A. where

B. whose

C. which

D. that

解析：考查定语从句。本题定语从句的先行词是case，定语从句很完整，故使用关系副词，排除BCD，它们都是关系代词。故A正确。