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Icons Greyed out - Why and how do I move on

Hi I think duo lingo is great. I'm only on level 5 but i'm having difficulty moving on as the icons are greyed out even though I've perfercted the others. Any one any ideas how I move on?



July 25, 2014

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You unlock skills and lessons by completing all the lessons/skills preceding the first greyed out lesson/skill.

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