Question

【题目】The police trying to who the murderer is.

A. is; find B. are; look for

C. is; check D. are; find out

Answer 1

【答案】D

【解析】句意：警方正在设法查明凶手是谁。考查系词和动词短语辨析题。the police是集合名词，系词不可用is，可排除AC选项。look for寻找，强调过程；find out找到，强调结果。根据句意和语境，可知选D。