Download the sample test from Goethe. Then, download the sample test from telc Deutsch B1 and ÖSD B1 . Together, you get 3 full exams. For the remaining 12, use the Modellsatz series from Hueber (often viewable for free on Google Books).
Simulate the real exam by printing out answer sheets (like the official Antwortbogen ). goethe zertifikat b1 neu 15 ubungsprufungen pdf free
If you're looking for additional resources to help you prepare for the Goethe Zertifikat B1 exam, here are some suggestions: Download the sample test from Goethe