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[2003春季上海] Unless to speak, you should remain silent at the conference. A. invit

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[2003春季上海] Unless to speak, you should remain silent at the conference. A. invit

38.[2003春季上海] Unless ________ to speak, you should remain silent at theconference.

A. invited    B.inviting 

C. being invited    D.having invited

 

试题答案

答案：A

提示：

题目考察动词过去分词的被动意义

 

标签：上海春季speakyoushould

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