The paper is made ____ wood and the bike is made ___ steel
问题描述：
The paper is made ____ wood and the bike is made ___ steel
A of from
B of of
C from from
D from of
理由是什么?
答
be made of 由.构成（能看出原材料）
be made from 由.构成 看不出原材料
答案,D