单项选择题
With regard to its size,Australia is（）country in the world.
A.the third largest B.the fourth largest C.the fifth largest D.the sixth largest
单项选择题 Like the island continent of Antarctica,Australia is located entirely in（）
单项选择题 In 1949（）became Canada.s tenth province.
单项选择题 In 1931 by（）Canada was formally declared to be a sovereign nation and became a member of the Common-wealth of Nations.
