He went from door to door,waste papers and magazines.A.gathering Bgathered 选哪个?为什么?
问题描述：
He went from door to door,waste papers and magazines.A.gathering Bgathered 选哪个?为什么?
答
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）