Plastics___many other materials.A.has taken the place of B.have taken place of

问题描述:

Plastics___many other materials.A.has taken the place of B.have taken place of

B 复数

A
此处塑料指的是塑料这一大类材料,是整体,故动词用单数.其中包括许多塑料种类(所以用复数)