Team Canada - Daria Gaiazova competes in the Ladies' 4x5km Relay at the 2014 Sochi Winter Olympics..

[QUIZ] So You Think You Know … Cross-Country Skiing

Cross-country skiers use their skis and poles to propel themselves through hilly, snow-covered courses up to 50km in length. How much do you know about one of the most physically demanding Olympic sports?

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