Question

________ (warn) of danger in the street at night, she had to go home, with a friend ________(accompany) her.

Answer 1

Having been warned;

accompanying　句意：因为被警告夜里上街有危险，所以她不得不在一个朋友陪伴下回家。第一个空强调“被警告”的动作发生于“回家”之前，故用现在分词完成时态的被动语态；第二个空accompany和a friend构成主动关系，故用现在分词形式作宾语补足语。