The police wondered of them is such a traffic accident.
A. whom; blaming to
B. who; to be blamed on
C. who; to be blamed for
D. which; to blame for
网友回答
A. whom; blaming to
B. who; to be blamed on
C. who; to be blamed for
(答案→)D. which; to blame for
解析：句意为：警察想知道，他们哪一个应该为这次交通事故负责。第一个空为宾语从句，他们中的哪一个，故为which, 第二个空be to blame应受责备，应负责任。故答案应为D。