Wealldemandedthenewtypeofmachine

发布时间:2020-07-27 02:36:34

We all demanded the new type of machine _________ put into use as soon as possible.A.refer toB.referred to beC.refer to beD.referring be

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B解析referred to是过去分词短语,作后置定语,与machine是被动关系。由于demanded要求宾语从句的谓语用“should+动词原形”或省略should,所以这里用be。
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