◎ 题干
—Allan looks tired out.
—Sure. He      in the gym for two hours.
A.works outB.had worked out
C.has been working outD.was working out
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Allan looks tired out.—Sure. He in the gym for two hours. A.works outB.had worked outC.has been working outD.was working 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。