It's said to be a case of murder ________ the children were used by adults.

A．when B．where

C．which D．that

 

B

【解析】B 考察定語從句。句義：據(jù)說這是一起謀殺案，在案件中孩子們被成年人利用了。先行詞是case，定語從句中缺少地點狀語。故B正確。

 

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