初二英语完形填空。Crows(烏鴉)areordinaryb_____.They'reabouttwentyincheslongandbiackallover.Crowsliveonoldbadfood.Crowseatalotofw_____food.Inthiswaytheyareveryusefultous.Thsyc_____upthedirtythingsinourstreets.Crowsarealwayshungry.Theylookforfoodalldaylong,andtowardseveningyoucanseetheminlargenumbersflyingb_____totheirnestsinthetrees.Thrysleepthereatnight.Crowsaremuchn_____thanothersbirds.Veryoftenalargenumbersofcrowswillgettogetherononehouseand"talk".Sometimestheytalktogether,andsometimestheydoitbyturnslikehumans.Itiseasytotellformcrows'soundiftheyarepleasedora_____。Perhapsitisbecausecrowsaresofriendlytoeachotherthattheytalkalot.Acoupleofcrowslivetogetheralltheirlives,andifoneofthemdies,theothersonebecomeverysadandquietfortherestofitsandsometimesdiess_____