I found a boy in the corner of the street on my way to the supermarket.A. cryB. cryingC.

问题补充：

I found a boy in the corner of the street on my way to the supermarket.

A. cry

B. crying

C. is crying

D. to cry

答案：

A. cry

(答案→)B. crying

C. is crying

D. to cry

解析：考查非谓语动词。句意：在我去超市的路上，我发现一个男孩正在街角里面哭。现在分词作状语表示正在进行的伴随性动作，和被修饰词是逻辑上的主谓关系。故选B。