You shouldn’t talk until ________ to.A．askingB．having askedC．to askD．asked
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You shouldn’t talk until ________ to.| A．asking | B．having asked | C．to ask | D．asked |
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答案
D |
解析
试题分析：句意：你不应该讲话直到你被问。这里until后是省略句，完整的是until you are asked；省略的条件是从句的主语与主句的主语一致，并且从句的谓语动词用be动词，这里把从句中的主语与be动词都省略，故选D。
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