◎ 题干
My mother       very busy       weekends.
A. does usually; at               B. is usually; on                                   C. usually is; on
◎ 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“ My mother very busy weekends. A. does usually; at B. is usually; onC. usually is; on…”主要考查了你对  【并列连词】【从属连词】【therebe句型】  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。