He showed me all the letters ___ the matter.He showed me all the letters ___ the matter.

问题描述:

He showed me all the letters ___ the matter.He showed me all the letters ___ the matter.
A relating B related with C relating to D relate to

C.relate to 意为:“涉及”’“关系到”.现在分词作定语,修饰letters.此短语表示这种意思时不用被动,故选C.