精选优质文档-倾情为你奉上2016届全国新课标高考英语语法填空专项训练语法填空练习一With the 1_ (develop) of industry, air pollution is getting more and more serious. InBeijing, many people suffer different kinds of illnesses because 2_ air pollution.Air pollution is caused by the following 3_: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off 4_ (poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Sm
