He went from door to door,waste papers and magazines.A.gathering Bgathered 选哪个?为什么?

He went from door to door,waste papers and magazines.A.gathering Bgathered 选哪个?为什么?

gathering.现在分词做伴随状语.分词和主语是主谓关系就有现在分词,被动关系就用过去分词.
例如
the girl came in,smiling
女孩进来了,面带微笑
the girl came in,smiled at (by people)
女孩进来了,大家冲她微笑（被冲着微笑）