摘要： Unless to speak, you should remain silent at the conference. A. invited B. inviting C. being invited D. having invited
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Unless ____ to speak, you should remain silent at the conference.
A invited B inviting C being invited D having invited
查看习题详情和答案>>Unless ________ to speak, you should remain silent at the conference
A. invited B. inviting C. being invited D. having invited
6.____,the experiment will be successful.
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Unless ________ to speak,you should remain silent at the conference.
[ ]
A. invited
B. inviting
C. being invited
D. having invited
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B. inviting
C. being invited
D. having invited