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Aspekte Grammatik B1-C1 is a German grammar guide that covers the grammar topics required for the B1-C1 levels of the Common European Framework of Reference for Languages (CEFR). The CEFR is a widely accepted framework that describes six levels of language proficiency: A1, A2, B1, B2, C1, and C2. aspekte grammatik b1-c1 pdf
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