◎ 题干
—__________ do I have to change the robot’s batteries? —Every two months.
A.How long B.How soon C.How often D.How many
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—__________ do I have to change the robot’s batteries? —Every two months.A.How longB.How soonC.How oftenD.How many…”主要考查了你对  【句子成分,句子结构】  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。