◎ 题干
Ladies and gentlemen, please fasten your seat belts. The plane ______..
A.take off B.is taking off
C.has taken off D.took off
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“ Ladies and gentlemen, please fasten your seat belts. The plane ______..A.take offB.is taking offC.has taken offD.took off…”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。