Americans eat ______ vegetables per person today as they did in 1910.
A、morethantwicemanyA
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Thosewhochangemobilephonestoofrequentlywillhavetopayforbeing______.
Homingpigeonisusefulasa______carrierbecausewhentakenfromhome,itwillreturnatthefirstopportunity.
OneoftheresponsibilitiesoftheCoastGuardistomakesurethatallships______followtrafficrulesinbusyharbors.
Hertalentandexperience______hertotherespectofhercolleagues.
Whilecrossingthemountainarea,allthemencarriedgunslestthey______bywildanimals.