◎ 题干
—Excuse me, Mum. When can we have dinner?
—Not until it   in half an hour.
A.is preparedB.has been prepared
C.will be preparedD.was prepared
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Excuse me, Mum. When can we have dinner? —Not until itin half an hour.A.is preparedB.has been preparedC.will be preparedD.was prepared…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。