for several weeks the city needed food.A. As having floodedB. Being floodedC. Having been

问题补充：

for several weeks，the city needed food.

A. As having flooded

B. Being flooded

C. Having been flooded

D. To flood

答案：

A. As having flooded

B. Being flooded

(答案→)C. Having been flooded

D. To flood

解析：the city与flood间为被动关系。flood的动作发生在need之前，因此本空用现在分词被动语态的完成式，而不可以是过去分词。