______,waterchangedintosteam.A.Heate

发布时间:2020-07-25 16:52:40

______, water changed into steam.A.HeatedB.HeatingC.Being heatingD.to heat

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A解析考查非谓语动词,句中逻辑主语与heat之间的关系为被动关系,故用过去分词,选A。
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