( ).-- I wonder what this beautiful dress____?--Silk.

题目

( ).-- I wonder what this beautiful dress____?--Silk.
A.made of B.is made of C.made from D.is made from
（求答案及解析）

答案

B is made of
辨析：be made from 由...制成（看不出原材料）
be made of 由.制成（能看出原材料）