Unless ________ to speak, you should remain silent at the conference.A．invitedB． - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

Unless ________ to speak, you should remain silent at the conference.

A．invited

B．inviting

C．being invited

D．having invited

答案

解析

考查非谓语动词作状语。You和invite构成被动关系，所以使用过去分词。句意：如果你没有被邀请发言，在会议上你应该保持沉默。

核心考点

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