How to keep the homeless with food and clothing is still under discussion．
A. supplying
B. supplied
C. being supplied
D. to be supplied
网友回答
A. supplying
(答案→)B. supplied
C. being supplied
D. to be supplied
解析：句意：怎样给无家可归的人提供食物和衣服这个问题正在被讨论。“无家可归的人”和“提供”之间是被动关系，故用过去分词，选B。