Of course workers who don't join the strike may risk ________ when they leave the factory．

A.attacking

B.to attack

C.being attacked

D.to be attacked

答案及解析： C

解析：

动词risk的用法是risk doing sth意思是：冒险做某事。根据句子的意思“工人是冒着被攻击的危险”。所以在这句句子中应该用被动语态being attack。