摘要：27．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
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
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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 |