During the Second World War, Roosevelt, Stalin and Churchill met at ________.
B
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TheMississippi,whichissometimescalled________,hasplayedavitalroleinthehistoryoftheUnitedStates.
IntheUnitedKingdom,policeofficersarenotallowedtojoin________ortogoonstrike.
ThelargestandsmalleststatesoftheUnitedStatesare________.