单项选择题

A．they don’t have to inhale foul air.
B．they don’t have to serve smokers.
C．they will get more tip from non smokers.
D．there will be a rise on their salaries.
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单项选择题
A．Greatly restrict public smoking.B．Ban smoking in all public places.C．Supervise smoking in some bars.D．Ban public smoking in England.
A．Greatly restrict public smoking.
B．Ban smoking in all public places.
C．Supervise smoking in some bars.
D．Ban public smoking in England.
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