All the following cases are on-the-job smoking except that______. Passive smoking means______.

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问题 All the following cases are on-the-job smoking except that______.
Passive smoking means______.

选项 A、never-smokers take up the habit of smoking unwillingly
B、never-smokers have to put up with the active smokers
C、never-smokers take in smoke released by a lit cigarette
D、never-smokers share an enclosed area with smokers

答案C

解析 本题是词汇题。定位到文章的第二段"Now many health experts warn…in enclosed areas".这两句话。比较四个选项,只有D项最符合被动吸烟的含义。
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