Americans eat ______ vegetables per person today as they did in 1910.
A
暂无解析
Iwasshockedbythenumberofpeoplewhoseemedtohavenothingbettertodowiththeirtimethan______toknowfishbetter.
Ifyou’resittingaroundalonelycampfireatnight,thehowlofawolfcansoundpretty______.
OneoftheresponsibilitiesoftheCoastGuardistomakesurethatallships______followtrafficrulesinbusyharbors.
In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.