题目内容
Please don’t talk in class until you .
A. were told to B. are told to C. were told D. are told
B 【解析】句意:直到你被要求讲,你才能在课堂上讲话。Not …until…意为:直到…才…。这里是在描述一条规则,用一般现在时即可,故排除AC;此句中要表示“你被要求..”,要用被动语态,这里是tell sb to do的被动形式,即sb be told to do;这里的to后省略了动词talk;但是这里的to不能省略,故选B。
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