◎ 题干
In order to finish the experiment successfully, the professor always _________, for every day the light in his room didn’t go out until 4 a.m.
A.mixed upB.cleaned upC.turned upD.stayed up
◎ 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“In order to finish the experiment successfully, the professor always _________, for every day the light in his room didn’t go out until 4 a.m.A.mixed upB.clea…”主要考查了你对  【动词短语】【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。