Lily:Hi,Dave.Doyouthinktheweatherisfinetoday?Dave:Yeah....
问题详情：Lily:Hi,Dave.Doyouthinktheweatherisfinetoday?Dave:Yeah.Andtheairisalsoclearerthaneverbefore.Lily:En,thenewspaperreportsthattheairislessandless 56 (pollute)thesedays.Dave:That’strue.Fewe...