The police asked him to what he had seen.A. set aboutB. set downC. set upD. set out

问题补充：

The police asked him to what he had seen.

A. set about

B. set down

C. set up

D. set out

答案：

A. set about

(答案→)B. set down

C. set up

D. set out

解析：词义辨析题。警察让他写下他所见到的事情。A. set about 开始 B. set down 写下 C. set up设立 D. set out 开始根据语境选B