问题
选择题
________ for several weeks，the city needed food.
A．As having flooded
B．Being flooded
C．Having been flooded
D．To flood
答案
答案：C
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。
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