◎ 题干
Food supplies in the flood-stricken area          . We must act immediately before there’s left.
A.have run outB.are running outC.have been run outD.are being run out
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Food supplies in the flood-stricken area. We must act immediately before there’s left.A.have run outB.are running outC.have been run outD.are being run out…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。