2. In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities. Each of the following is an assumption made in the argument above EXCEPT: (A) In most major cities, air-pollution problems are caused almost entirely by local industry.（取非：如果大部分城市中空气污染不是主要由当地工业引起，那么制定针对当地工业的air-pollution regulations也不能减少空气污染，也就是没必要实施） (B) Air-pollution regulations on industry have a significant impact on the quality of the air.（取非：如果Air-pollution regulations对空气质量没有效果，那么，鸟类的增多也不一定是因为空气质量上升，其实没有效果就可以推出没有必要让其他大城市实施） (C) The air-pollution problems of other major cities are basically similar to those once suffered by London.（取非：如果其他城市空气质量很好的话，就没有必要实施Air-pollution regulations） (D) An increase in the number of bird species in and around a city is desirable.（取非：如果不需要鸟类增多，也就没有必要实施，目标无效性）（A）
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.（取非：如果鸟类增加并不是动物种类增加的标志，也有可能实施计划，因为目标有可能只是为了减少污染，增加鸟类） 答案为A，每个选项后面是我的denial test，我觉得应该选E，请教各位g友，谢谢 | 
