Catsanddogsarethemos的精選

問題詳情：CatsanddogsarethemostpopularpetsamongAmericans.SoitisnotsurprisingthatwecanfinddifferentsentencesaboutcatsinalanguagebookwhenwelearnEnglish.Unlikedogs,itisdifficulttoteachcatstodosomething.Cat...