Peoplemayeasilyignor的精选

问题详情：根据短文内容及首字母提示，Peoplemayeasilyignorethatwearelivinginaworldfullofdifferentc   __1_,suchasred,blue,green,black,v____2___andsoon.Wecannevertellhowmanykindsofthemthereare.Butweallknow...