1.if the air in a city ..........(get) very polluted, it can make people’s eyes burn. 2.if we dump all sorts of chemicals into rivers, we ......( so be) able to swim in them. 3.if people ........(not be) so careless, Earth wouldn’t be in danger. 4.many fish wouldn’t die if factories ............(not dump) so many chemicals ino rivers and oceans. 5. if people stopped using cars comlpetely, there ...........(be) much less pollution. 6. you ( not pass) .......... your driving test unless you drive more carefully. 7. he’ll be ill if he ( not stop) ......... worrying so much. 8.we’ll go to the beach tomorrow if it ( be) ...........nice. 9. if there were fewer cars on the road, there ( be) ......... less pollution. 10. if peolpe really cared about the environment, they ( not dump ) ............. waste into. 11.if there was no fresh water in the world, what ( happen)......... . 12. when i arrived at the cinema, what ( happen ) .......