根据魔方格专家分析,试题“By the time I got to the airport, the plane .[ ]A. took offB. has taken offC. had taken off…”主要考查了你对 【过去完成时】 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。
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