The police were seeking more information to find out the rich merchant.
A. who was it that killed
B. who it was that killed
C. it was who killed
D. who was it killed
网友回答
A. who was it that killed
(答案→)B. who it was that killed
C. it was who killed
D. who was it killed
解析：可联系答.案.网客服索取。