【導讀】Thisisourhome.WeliveonEarth.aroundus.Airis…Airhas…Weneedairto…Wecan…withair.Whenthewindblows,wecanfeelit.Whenwebreatheit,Itkeepsusalive.No.Ituseshotair.Theyrideonair.Whatisit?Canyouseeorfeelit?Whatisit?Canyouseeorfeelit?Itisair.No,itdoesn’t.Icannotseeit,butIcanfeelit.Wecannot____it,butwecan____it.Whyisitimportant?Itis__________.andbirds.Theyallneedittoo.Itisair.Wecannotseeit,butwecanfeelit.Itiseverywhere.Theyallneedittoo.Whatdoweneed?Takeapieceofcloth.toeachcorner.themtoasmalltoy.Whathappens?gently/heavily.and72.Bookpage68.56and58.