The most___recycled material are those____in large quantities.
问题描述：
The most___recycled material are those____in large quantities.
A.common,used Bcommonly,are used C.commonly,that are used D.common,use
选什么,为什么?
答
A.common,used
后面是名词recycled material 用形容词修饰名词
后面是说大批量的被使用用被动