—Excuse me. I want to buy some stamps. Where can I find a post office?—I know is not far

—Excuse me. I want to buy some stamps. Where can I find a post office?
—I know is not far from here. You can easily find .
A. that; it
B. it; one
C. one; it
D. that; one

A. that; itB. it; one(答案→)C. one; itD. that; one解析：考查情景交际和代词的指代。“打扰下，我想买一些邮票。哪里有邮局啊？”“我知道一个邮局在这附近，你可以很容易就找到它。”表示泛指“一个”，用one；表示特指用it。根据句意可知，第一空是泛指“一个邮局”；第二空是特指“那个邮局”。故选C。

正好我需要