InCanadathefederalgovernmentshavealwaysbeenformedby________.
翻译:Yettherewasabiggermovementintheairby1750.
Thestudentsarerequiredto________themainideasofthearticleintheirownwords.
DuringtheSecondWorldWar,Roosevelt,StalinandChurchillmetat________.
AustralianAboriginesbelievedinacreativeperiod,usuallyreferredtoinEnglishas________.