◎ 题干

He used to visit his parents _____, but he is too busy to call on them now.
A every second weeks        B every two weeks
C every a few weeks         D every two week
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“He used to visit his parents _____, but he is too busy to call on them now.A every second weeks B every two weeksC every a few weeks D every two week…”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。