mend the sheep-pen after a sheep is lost(旁白
旁白:Once upon a time，in a big farm, there was a farmer and his sheep，and our story began.
农夫:I’m a farmer.A happy farmer.I have a big farm, very very big.This is my sheep-pen.
Good morning,my baby sheep.
羊：Good morning 。
农夫：Come on,my baby sheep.How nice it is! Ha ha ha….