Youngpeopletendtogetupverylateun

发布时间：2020-07-25 20:13:11

Young people tend to get up very late unless ________ to rise earlyA.requiredB.requiringC.they were requiredD.to require

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A解析考查非谓语动词。当unless引导的状语从句与主句主语一样时，可以省略，用they are required，故选A。
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