题目

完形填空。When people talk about air pollution, they are usually thinking about outdoor air   1  . But do you know that there is also air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of the illnesses have   2   to do with the polluted indoor air.A lot of pollution comes from indoor activities   3   smoking and cooking. As most people   4   about 80%-90% of their time inside buildings, it is important to take indoor air pollution serious关于欧洲西部旅游景点的说法，正确的是（　　）A．英国的峡湾风光引人入胜B．伦敦的艾菲尔铁塔令人景仰C．南部地中海沿岸国家的海滨沙滩优美宜人D．芬兰的花卉尤其是郁金香闻名世界