on his past mistakes Ted realized that he had stayed around the wrong people.A. To refle

问题补充：

on his past mistakes, Ted realized that he had stayed around the wrong people.

A. To reflect

B. Reflecting

C. Reflected

D. Being reflected

答案：

A. To reflect

(答案→)B. Reflecting

C. Reflected

D. Being reflected

解析： 考察非谓语动词用法。本句中的动词短语reflect on与句子主语Ted之间构成逻辑上的主动关系，故使用现在分词短语在句中作状语。句意：回忆过去的错误，Ted意识到自己的周围都是一些不好的人。A项中的不定式通常在句中作目的状语。故B正确。