◎ 题干
David helps his mother with the housework every Saturday for abou_________t.
A.one and half hoursB.a half and an hour
C.an hour and halfD.one and a half hours
◎ 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“David helps his mother with the housework every Saturday for abou_________t.A.one and half hoursB.a half and an hourC.an hour and halfD.one and a half hours…”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。