Unless ___ to speak, you should remain silent at the conference. A．invited B．inviting C．being invit...
2022-12-24 01:09:29 45次 2013届甘肃省高三第二次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Unless ___ to speak, you should
remain silent at the conference.
|
A．invited
|
B．inviting
|
C．being invited
|
D．having invited
|
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