◎ 题干
—Did any signs come up before the earthquake?
—Yes. Unusual things             all those days. For example, a number of animals got out their homes.
A.happeningB.were happeningC.has happened D.had happened
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ —Did any signs come up before the earthquake? —Yes. Unusual things all those days. For example, a number of animals got out their homes.A.happeningB.were ha…”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。