While Billie Holiday did not invent the music called "the blues", she most assuredly helped popularize it.
A、finallyB
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Alligatorsstillexistinsomeofthedank潮湿swampsandbayous小海湾ofAlabama'scoastalregions.
ThecompanyissuesanannualreporteveryMarch.
ThefuturesurvivalofthebaldeagleisstillanimportantAmericanecologicalconcern.
ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.
AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent
