The air pollution in this area caused the _____ of many tree

Some of them which remain in the air _____ the air pollution The polluted air in this area has a strange smell,__ many pe What polluted the air and the water in this area? many of the world's pollution problems have been caused by t 第一题Many of the world’s pollution problems have been caused b The storm left,having caused a lot of damage to this area. The storm left ,a lot of damage to this area .A．caused B．to What is the cause pollution of air? _____ for a long time, most of the crops in this area died f Few of the children in this area have been to Beijing,_____? 19 ._____ for a long time,most of the crops in this area die _____ for a long time,most of the crops in this area died fr