◎ 题干
John couldn’t take part in the activity held at the cultural center yesterday for _____ reasons.
A.series ofB.all kindsC.the number ofD.a variety of
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“John couldn’t take part in the activity held at the cultural center yesterday for _____ reasons.A.series ofB.all kindsC.the number ofD.a variety of…”主要考查了你对  【序数词】【小数】【分数】【量词】  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。