What is it made of?
问题描述：
What is it made of?
答
这是什么材料生产的？what是特殊疑问词，be made of由……制造，it是代词
答
它是由什么做的？
答
它是有什么制成的？
答
What is it made of?
它是用什么制造的?。
区别 made from 由…做成（看不出原材料）；由…制造
答
这是什么做的?/ 这是什么组成的?
例子：A:Good morning.what can i do for you?
B:Yes,i'd like a blue hat.
A:Ok,here it is.
B:It is made of cotton?
A:No .it isn;t
B:Oh.What is it made of?
A:It's made of wool
B:I see.thank you
答
什么用~制成？