完形填空Earlyinthemorning,atnoon,orintheeveninginbigcitiesa...
问题详情：完形填空Earlyinthemorning,atnoon,orintheeveninginbigcitiesandinthecountryside,allovertheUnitedStates,youcanseeAmericansrunning—menandwomen,youngandold．Peoplerun 1—alongthebeachesofCaliforn...