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

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Plastics___manyothermaterials.A.hastakentheplaceofB.havetakenplaceofPlastics___manyothermaterials.A.

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

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

B 复数