完形填空。Earlyinthemorning，atnoon，orintheeveninginbigcities...
问题详情：完形填空。Earlyinthemorning，atnoon，orintheeveninginbigcitiesandinthecountryside，allovertheUnitedStates，youcanseeAmericansrunning—menandwomen，youngandlerun__1__—alongthebeachesofCalifornia，__2__Cen...