—Yesterday I lost my pen. I couldn’t find. —Oh it’s a pity. You’d better buy this aftern

问题补充：

—Yesterday I lost my pen. I couldn’t find.

—Oh, it’s a pity. You’d better buy this afternoon.

A. it; it

B. it; one

C. one; it

D. one; one

答案：

A. it; it

(答案→)B. it; one

C. one; it

D. one; one

解析：句意：昨天我丢了我的钢笔。我找不到它。哦，真遗憾。你最好今天下午买一支。前一空指代丢失的那支钢笔，可用it代替。而后一空泛指一支钢笔，该用不定代词one。因此选B。