Ourknowledgeofcomputers__________growingallthetime.A.beB.isC.areD.were

发布时间:2020-08-14 13:46:10

Our knowledge of puters__________growing all the time.A.beB.isC.areD.were

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B解析knowledge是不可数名词,作主语,谓语动词用单数。
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