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Children in school are____into different levels of grades,according to how much they know.
A.combinedB.classifiedC.listedD.clarified
B
句意:根据孩子们知道的多少,他们在学校被分为不同层次的年级。classify意思为“将……分类,分班”;其他几个词没有这层意思,不合题意。combine结合;list列举,列出;clarify澄清,阐明。
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