— Why can’t I smoke here?
— At no time in the meeting room.
A. is smoking permitted
B. smoking is permitted
C. does smoking permit
D. smoking does permit
网友回答
(答案→)A. is smoking permitted
B. smoking is permitted
C. does smoking permit
D. smoking does permit
解析：答句中否定介词短语at no time位于句首，表明了句子的主谓结构应采用部分倒装的形式，即将句中的助动词调至主语之前。根据句子意思该句为被动语态，排除选项B、C、D。