In order to help the police the witness described what he had seen very carefully not to

问题补充：

In order to help the police ，the witness described what he had seen very carefully not to any detail.

A. act out

B. leave out

C. pick out

D. put out

答案：

A. act out

(答案→)B. leave out

C. pick out

D. put out

解析：考查词组，act out 付诸行动 leave out 遗漏，省去 pick out 挑选出 put out扑灭

句意为，为了帮助警察，目击者非常详细地描述了他所看到的，为了不遗漏任何细节。