题目内容：
根据下列材料请回答题：PassiveSmoking Is Workplace Killer
Pressure mounted on Britain on Monday to takeaction on_______(51)smoking with new research showing second—hand smoke_______(52)about one worker each week in the hospitality industry(服务行业).
ProfessorKnorad Jamrozik，of Imperial(帝国的)College in London，told a conference onenvironmental tobacco that second—hand_______ (53)kills 49 employees inpubs，bars，restaurants and hotels each year and contributes to 700 deaths fromlung cancer，heart_______ (54)and stroke across the total national workforce.
“Exposure in the hospitality_______ (55)at work outweighs(超过)theconsequences of exposure of living_______ (56)a smoker for those staff,”jamrozik said in an interview.
Other_______ (57)have measured the levels ofexposure to passive smoking but Jamrozik calculated how it would translate intoavoidable deaths.
His findings are_______ (58)on the number of peopleworking in the hospitality industry in Britain，their exposure to second handsmoke and their_______ (59)of dying from it.
Jamrozik said the findingswould apply to_______ (60)countries in Europe because，to a greater or_______(61)extent，levels of smoking in the community are similar.
Professor CarolBlack，president of the Royal College of Physicians，which sponsored themeeting.said the research is proof of the need for a ban on smoking In_______(62)places.
“Environmental tobacco smoke in pubs，bars，restaurants and otherpublic places is _______ (63)damaging to the health of employees as well as thegeneral public，”she said in a statement。
“ Making these places smoke—freenot only protects vulnerable(易受伤害的)staff and the public，it will_______(64)helpover 300，000 people in Britain to stop smoking completely，”sheadded.
Ireland recently became the first country to introduce a nationalban on smoking in public_______ (65).New York and parts of Australia have takensimilar measures. A．natural
B．passive
C．extensive
D．whole
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