题目内容：
请根据短文的内容，回答题。Passive Smoking Is Workplace Killer
Pressure mounted on Britain on Monday to take action on ___________ (51) smoking with new research showing second-hand smoke ___________(52) about one worker each week in the hospitality industry (服务行业) .
Professor Knorad Jamrozik, of Imperial (帝国的 ) College in London, told a conference on environmental tobacco that second-hand ___________(53) kills 49 employees in pubs, bars,restaurants and hotels each year and contributes to 700 deaths from lung cancer, heart ___________(54)and stroke across the total national work force.
"Exposure in the hospitality ___________ (55) at work outweighs (超过) the consequences of exposure of living ___________(56) a smoker for those staff," Jamrozik said in an interview.
Other ___________(57) have measured the levels of exposure to passive smoking but Jamrozik calculated how it would translate into avoidable deaths.
His findings are ___________(58) on the number of people working in the hospitality industry in Britain, their exposure to second-hand smoke and their ___________(59) of dying from it.
Jamrozik said the findings would apply to ___________ (60) countries in Europe because, to a greater or ___________(61) extent, levels of smoking in the community are similar.
Professor Carol Black, president of the Royal College of Physicians, which sponsored the meeting, said the research is proof of the need for a ban on smoking in ___________ (62) places.
"Environmental tobacco smoke in pubs, bars, restaurants and other public places is ___________(63)damaging to the health of employees as well as the general public," she said in a statement.
"Making these places smoke-free not only protects vulnerable ( 易受伤害的) staff and the public, it will ___________(64) help over 300,000 people in Britain to stop smoking completely," she added.
Ireland recently became the first country to introduce a national ban on smoking in public___________ (65). New York and pubs of Australia have taken similar measures.
_______ A．passive
B．natural
C．positive
D．whole
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