____ by air pollution,acid rain ____ spread everywhere

____ by air pollution,acid rain ____ spread everywhere Now air pollution is destroying our world ____. What is acid rain usually caused by? He went to london by air 改为同义句 改为 He ____ ____ ____ to Londo 1.Air pollution ____,this city is still a good place to live Air pollution affects ____ living thing in the world.A.each Travelling by air may be ____,but not so ____. 答案是quicker ch Acid Rain Monitoring by SimultaneousIon-Exclusion/Cation-Exc air pollution we can ____ see ____ touch air The teacher ____ English is spoken everywhere. They are everywhere = They are ____ around ____