We want to make clear the material____the machine is made.A.which B.that C.of which D.

题目

We want to make clear the material____the machine is made.A.which B.that C.of which D.
We want to make clear the material____the machine is made.
A.which B.that C.of which D.from which
选D,为什么?求详解

答案

定语从句,要填的词做引导词,使用还原原则,还原之后得到的是The machine is made from the material.容易误选的是C项,be made of 和 be made from的区别是be made of是指从合成物可以看出原材料的情况而be made from...