单项选择题
The St.Lawrence and（）together form an important transportation network for eastern Canada.
A.cards decorated with hearts B.Cupid armed with bow and arrow C.flowers tied with red ribbons D.roast turkey
单项选择题 he longest river in Canada is（）.
单项选择题 Canada.s largest city is（）
单项选择题 Nearly（）of the land in Canada has no permanent population.
