---Excuse me I want to buy some milkWhere can I find a supermarket?---Oh I know not far

问题补充：

---Excuse me，I want to buy some milk．Where can I find a supermarket?

---Oh，I know not far from my home．

A. it

B. that

C. one

D. its

答案：

A. it

B. that

(答案→)C. one

D. its

解析：考查one和it的用法，it代替前面同一个东西，One代替前面同类的东西，句子意思“我知道离我家不远有个超市”，所以选C