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Don't leave for there until__________ to do so


  1. A.
    you'll be told
  2. B.
    told
  3. C.
    telling
  4. D.
    you are told
BD
试题分析:首先,该句考察的是状语从句的时态问题,我们常讲“主将从现”,故从句应用一般现在时或现在完成时,另意为:不要去那除非有人叫你去,故选 D ,另外when, while, if, as if, although / though, as, until, once, whether, unless, where等引导的从句中,如果其谓语为be,而主语与主句的主语相同时,则从句的主语和be可省略。主句为祈使句,主语为you,而从句主语为you,谓语动词为be,故而选B。
考点:考察状语从句及其省略
点评:状语从句是我们十分熟悉的从句,考试中常考查它的时态问题及由此而产生的诸如省略一系列问题,平时学习时要给予足够的重视。
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