This purse is made of a leather 语病在哪

题目

This purse is made of a leather 语病在哪

答案

This purse is made of leather.
be made of :由...组成（可以看出原材料）
be made from:由...组成（不可以看出原材料）
Leather 是不可数名词,所以前面不用a.