问题补充:
The man in a shop was sent to the police station.
A. who caught stealing
B. to be caught stealing
C. caught to steal
D. caught stealing
答案:
A. who caught stealing
B. to be caught stealing
C. caught to steal
(答案→)D. caught stealing
解析:这是过去分词当定语,这个分词短语可转化为who had been caught stealing,即动词catch的宾补要用现在分词而不是不定式。