The longest river in Canada isA．the Mackenzie.B．the St. Lawrence.C．the Severn.D．the Yukon.

The Changjiang River is one of ______ in the world.A、the longest riverB、longest riversC

The US border with Canada is the ______ in the world.A．longest defended borderB．longest un

The US border with Canada is the ______ in the world.A．longest coastal borderB．longest def

The largest river in Canada isA．Mackenzie River.B．St. Lawrence River.C．Severn River.D．Yuko

______is the longest river in Canada.A．The Mackenzie RiverB．St. Lawrence RiverC．Columbia R

The longest river in Ireland is______River.A．MississippiB．SevernC．NileD．Shannon