◎ 题干

We have been excavating layers of ash almost six metres thick, which suggests that they________the fire burning all winter.
A.should keepB.might have keptC.should have keptD.might keep
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“We have been excavating layers of ash almost six metres thick, which suggests that they________the fire burning all winter.A.should keepB.might have keptC.shoul…”主要考查了你对  【虚拟语气】【情态动词】  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。