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    A. comprehensive

    B. spread

    C. impact

    D. incredible

    E. observed

    F. compared

    G. success

    H. firmly

    I. combination

    J. heavily

    K. motivate

    A new report by the World Health Organization (WHO) reveals that around one in a hundred deaths worldwide is due to passive smoking, which kills an estimated 600,000 people a year.

    In the first study to assess the global (41) ___________ of second-hand smoke, WHO experts find that children are more (42) ________ exposed to second-hand smoke than any other age-group, and around 165,000 of them a year die because of it.

    Children’s exposure to second-hand smoke is most likely to happen at home, and the double blow of infectious diseases and tobacco seems to be a deadly (43) __________ for children in these regions. Commenting on the findings, Heather Wipfli and Jonathan Samet from the University of Southern California, said policymakers try to (44) _________ families to stop smoking in the home.

    While deaths due to passive smoking in children were skewed(曲解) toward poor and middle-income countries, deaths in adults were (45) _________ across countries at all income levels.

    In Europe’s high-income countries, only 71 child deaths occurred, while 35,388 deaths were in adults. Yet in the countries like Africa, an estimated 43,375 deaths due to passive smoking were in children (46) ___________ with 9,514 in adults.

    Only 7.4 percent of the world population currently lives in places with (47) __________ smoke-free laws, and those laws are not always (48) __________ enforced(施行). In places where smoke-free rules are (49) ___________, research shows that exposure to second-hand smoke in high-risk places like bars and restaurants can be cut by 90 percent, and in general by 60 percent, the researchers said.

    Studies also show such laws help to reduce the number of cigarettes smoked by smokers and lead to higher (50) _____________ rates in those trying to quit.

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