The Common European Framework of Reference (CEFR) defines B1 as the "Threshold" level. At this stage:
Identifying and correcting typical grammar and vocabulary "traps." deutsch fur besserwisser b1 pdf
Includes MP3 audio files (often via CD or download) with over 100 minutes of material focused on listening comprehension and pronunciation. The Common European Framework of Reference (CEFR) defines
This is why every serious intermediate learner searches for . but fahren mit + Dativ
Not just fahren , but fahren mit + Dativ , fahren nach + Dativ (ohne Artikel) . Besserwisser materials include lists of verbs with fixed prepositions and case markings.