PartBLet’slearnUnit4AtthefarmWelcometothefarm.Aretheysheep?Aretheysheep?No,theyaren’t.No,theyaren’t.Aretheycows?Aretheycows?No,theyaren’t.No,theyaren’t.Lookatpigs.Theyarefat.Theyarefat.Yes,theyare.Yes,theyare.Hello.Nicetoseeyouagain.Welcometomyfarm.Oh,whoscoming?hen→hensWhatarethese?--Theyare.hen×√hens[hens]母鸡Whatarethese?Theyarehens.cowcows[kaʊs]奶牛Arethesehens?No,theyarent.Theyare...
