We need refrigerator so we are going to buy from the department store this afternoon.A.

问题补充：

We need refrigerator, so we are going to buy from the department store this afternoon.

A. a; it

B. the; one

C. a; one

D. the; the one

答案：

A. a; it

B. the; one

(答案→)C. a; one

D. the; the one

解析：考察代词和冠词用法。第一空用a表示泛指一台冰箱。One指代可数名词单数，表示泛指；the one 表示特指。句意：我们需要一台冰箱。所以我们今天下午我们要去商场买一台回来。故C正确。