Fill in the blank. The longest river in Canada is ______.

Answer: The Mackenzie River.

Discover Canada states the Mackenzie River, at 4,200 km, is the second-longest river system in North America (after the Mississippi) and the longest in Canada.

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This practice question is based on Discover Canada, the official study guide for the Canadian citizenship test. Brush up on this topic in our Geography study guide.

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