A good friend of mine from when I was born at my home right before I left for Beijing．
A. showing up
B. showed up
C. to show up
D. shows up
网友回答
A. showing up
(答案→)B. showed up
C. to show up
D. shows up
解析：考查谓语动词：from when I was born是定语修饰A good friend of mine，show up是谓语动词，用过去分词，句意：我的一个发小就在我去北京前来到我家。选B。