After the flooding people were suffering in that area urgently needed clean water medicine

问题补充：

After the flooding，people were suffering in that area，urgently needed clean water，medicine and shelter to survive. (·江苏，22)

A. which

B. who

C. where

D. what

答案：

A. which

B. who

C. where

D. what

解析：B

解析指人的先行词people在非限制性定语从句中充当主语，所以用关系代词who引导。故选B项。