题目内容
In the lecture, little Tom kept silent all the time unless _________ to express his opinion.
A. he invited B. he is invited
C. invited D. being invited
C
【解析】
试题分析:考查省略。句意:在整个讲座的过程中,小汤姆一直保持沉默,除了有人邀请他发言。Tom与invite是动宾关系,即Tom被他人邀请。A项不完整,B项时态不正确,D项时态不正确,unless invited的完整形式是unless he was invited to...,故选C。
考点:考查省略
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