【高中英语,求分析】1.Unless______ to speak,you should remain silent at the conference.A,invited B.inviting C.being invited D.having invited 我想选A,但好像C也没什么不对直接用非谓语不行吗

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【高中英语,求分析】1.Unless______ to speak,you should remain silent at the conference.A,invited B.inviting C.being invited D.having invited 我想选A,但好像C也没什么不对直接用非谓语不行吗
【高中英语,求分析】1.Unless______ to speak,you should remain silent at the conference.
A,invited B.inviting C.being invited D.having invited
我想选A,但好像C也没什么不对
直接用非谓语不行吗

【高中英语,求分析】1.Unless______ to speak,you should remain silent at the conference.A,invited B.inviting C.being invited D.having invited 我想选A,但好像C也没什么不对直接用非谓语不行吗
A,invited
这是个条件句.
除非你被邀请发言,否则你应该在会议中保持沉默.
强调的是一个是否的结果.
而不是being这个动作.
问题补充:
直接用非谓语不行吗
如果直接用非谓语,就不是条件句了,要用Being not invited.

答案是c,被动语态
除非你被邀请发言,否则你应该在会议中保持沉默
不行

C
主语是你
表被动 不能直接用动词的非谓语,而只能用动词的被动语态的非谓语形式
所以选C

额。。。C选项是表正在被做