It's said to be a case of murder the children were used by adults.A. whenB. whereC. which

问题补充：

Its said to be a case of murder the children were used by adults.

A. when

B. where

C. which

D. that

答案：

A. when

(答案→)B. where

C. which

D. that

解析：B 考察定语从句。句义：据说这是一起谋杀案，在案件中孩子们被成年人利用了。先行词是case，定语从句中缺少地点状语。故B正确。