精英家教網 > 高中英語 > 題目詳情
Unless ___ to speak, you should remain silent at the conference.
A．invitedB．invitingC．being invitedD．having invited
A

試題分析：原句意思是，除非你被邀請發(fā)言，否則你應該在會議上保持安靜。連詞后可以直接加現在或過去分詞，由主動被動決定．由于＂你＂是被邀請的，所以應該用過去分詞，故選A。
點評：連詞后可以直接加現在或過去分詞，由主動被動決定．由于＂你＂是被邀請的，所以應該用過去分詞。
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