【题目】Smoking does great harm to our health. ________ is smoking allowed in public places.
A.At no time
B.In no time
C.At all times
D.All the time

【答案】A
【解析】A. At no time决不；B. In no time立刻；C. At all times总是；D. All the time一直；句子结构分析，第二部分是倒装句，应选择具有否定意义的短语；句意：吸烟有害健康。所以在公共场合决不允许吸烟。根据句意，故选A。