we can have ____bluer sky if we create ____less polluted wor

we can have ____bluer sky if we create ____less polluted wor We can have _____ blue sky if we create _____ less polluted we can have ()blue sky if we create () less polluted world we can have ___bluer sky if we create_____ less polluted wor 这个英语试题怎么选?We can have空blue sky if we create空less polluted wo We never expect___bluer sky unless we create __less polluted We can have__bluer sky if we create__less polluted world.A.a We will have a bluer sky if we create a less polution wold.如 We can have( )blue sky if we cteate( )les We can never expect a bluer sky___ we create a less polluted 28. We can never expect ______ bluer sky unless we create __ We can never expect ___ bluer sky unless we create ___ less