◎ 题干
(2014·山东实验中学一模)With his attention________on his mobile phone,he didn’t notice his headteacher’s appearance.
A.fixed  B.having fixed
C.fixing D.to fix
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“(2014·山东实验中学一模)With his attention________on his mobile phone,he didn’t notice his headteacher’s appearance.A.fixedB.having fixedC.fixingD.to fix…”主要考查了你对  【独立主格结构】  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。