Question

【题目】Please don’t stand up in class until you ______.

A. were told to B. are told

C. are told to D. were told

Answer 1

【答案】C

【解析】

考查省略句。句意：直到有人叫你站起来，你才可以在课堂上站起来。在一定的上下文中，为了避免重复，动词不定式在句中可以被省略掉，但是要保留动词不定式的符号to。分析句子可知，本句为一般现在时。故C选项正确。