Asitiseasilyshapedandmelted,p

发布时间：2020-07-27 19:38:01

As it is easily shaped and melted, plastics ________ the place of many other materials.A.has been takenB.have been takenC.have takenD.has taken

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D解析导解：plastics物质名词作主语，谓语用单数．
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