◎ 题干
—Where is my pen?
—I _________ it on the desk, but I don’t know who _________ it away.
A.put; has takenB.put; took C.have put; tookD.have put; has taken
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Where is my pen?—I _________ it on the desk, but I don’t know who _________ it away.A.put; has takenB.put; took C.have put; tookD.have put; has taken…”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。