FirstLadyMichelleObamaisabigfanofvolunteering.Volunteer...
問題詳情：FirstLadyMichelleObamaisabigfanofvolunteering.Volunteeringmeansworkingforfreetohelpsomeoneelse.Mrs.Obamasaysvolunteeringisveryimportant.“Itshouldbepartofeveryone’slife,”shesays.Manyteensagr...