◎ 题干
Please don't stand up in class until you _______.

A. were told to
B. are told to
C. were told
D. are told
◎ 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“Please don't stand up in class until you _______. [ ]A. were told to B. are told to C. were told D. are told …”主要考查了你对  【一般现在时】【介词】  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。