withhouseisanimalsSomepeopelfriendsdogshelpdoAnimalsareour______.Wecanfinddifferentkindsof______ontheearth.______animalsarelivinginbigforests.Andsomeanimalsareliving_____man.Animalsareveryimportant(重要)toman.For
withhouseisanimalsSomepeopelfriendsdogshelpdo
Animalsareour______.Wecanfinddifferentkindsof______ontheearth.
______animalsarelivinginbigforests.Andsomeanimalsareliving_____man.
Animalsareveryimportant(重要)toman.Forexample,_______cantrain(训
练)theelephantsto______someheavywork.Andtheycanalsotrainthedogs
tolookafterthe_______.Awatchdog______veryclever,itcan______people
indanger.
Childrenlike______verymuch.