◎ 题干

Until recently historians assumed that calendars ________ with the advent of agriculture.
A.came to existenceB.came to existing
C.came to existD.were existential
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Until recently historians assumed that calendars ________ with the advent of agriculture.A.came to existenceB.came to existingC.came to existD.were existential…”主要考查了你对  【动词短语】【动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。