题目内容：

Yesterday I saw a thief was caught ( )arm by a policeman in the street
A in his
B by his
C on the
D by the
why?

优质解答

D by the
这是固定搭配,表示抓住HOLD/SIEZE/CATCH某一部位时用BY THE ..(不用所有格).例如HE LED ME ACROSS THE STREET BY THE HAND.