— Excuse me. I want to buy some stamps but I can’t find a post office.— I know nearby. C

问题补充：

— Excuse me. I want to buy some stamps, but I can’t find a post office.

— I know nearby. Come on, I’ll show you.

A. that

B. it

C. one

D. any

答案：

A. that

B. it

(答案→)C. one

D. any

解析：考查代词。That特指某一个； it前文提到的同名同物的一个 one同名不同物的任何一个；any任何一个。句意：打扰了，我想买些邮票，但是我找不到邮局。——我知道附近有一家，来吧，我告诉你。可知下文指的是同名不同物的一个，故选C。