文档介绍：阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
Leaders of the World anization say they are concerned about the air quality and
health efiects on citizens during a recent outbreak of heavy pollution in ,they said they
were unsure of the exact amount the air pollution takes on any person’s body,casting doubts on
local reports tying the area’s dirty air to particular cases of illness.
Speaking at a briefing(情况介绍会)on Tuesday,the WHO’s Western Pacific regional director,
Shin Young—Soo,cited(列举)reports about poor air quality causing lung cancer in recent weeks.
“The WHO is skeptical of the information,”she said.“We’re cautious of whether the illness is related
to air po11ution. We know it has an impact on health,but we don’t know how much.”
The officials didn’t cite particular follow a number of articles since late
last year connecting some cases of diseases like lung cancer with pollution,.including one in
November regarding an 8-year-old girl.
The health impact of Beijing’s gray skies has been on the minds of many over the past week。Local
authorities on Tuesday preserved an orange alert(警报)一the city’s second highest pollution-warning
level—and again warned people to stay widely agree that small particulates(颗粒)
known as carry significant short-and long-term health risks,particularly with
studies find a certain