The medical team left the village with great satisfaction, a lot of local villagers.A. tr

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A. treating
(答案→)B. having treated
C. to treat
D. treated
解析：考查非谓语动词作状语，分词的动作发生在谓语动词之前，所以应用现在分词的完成式，句意：给当地的许多村民治疗了之后，这个医疗队非常满意的离开了村庄。这里用having treated 作原因状语。所以选B。