The old man was the only person on the spot（现场） so the policeman asked him to the facts

问题补充：

The old man was the only person on the spot（现场）, so the policeman asked him to the facts as he remembered them.

A. set up

B. dig out

Cset down

D. keep out

答案：

A. set up

B. dig out

(答案→)C. set down

D. keep out

解析：考查短语辨析。A建立，成立；B挖掘；C记录，写下；制定；D扣留；句意：那个老人是在场的唯一一个人，所以警察让他写下他能记得的事实。根据句意说明C正确。