FirstLadyMichelleObamaisabigfanofvolunteering.Volunteer...
问题详情：FirstLadyMichelleObamaisabigfanofvolunteering.Volunteeringmeansworkingforfreetohelpsomeoneelse.Mrs.Obamasaysvolunteeringisveryimportant.“Itshouldbepartofeveryone’slife,”shesays.Manyteensagr...