It looks like you’re looking for a draft paper related to Cornelsen B1 Lösungen (solutions for Cornelsen’s B1 German course materials, such as Studio d, Pluspunkt Deutsch, or Cornelsen B1 – Allgemeine Ausgabe).
What is Cornelsen B1?
The most reliable place to find answer keys is directly from the publisher. Many Cornelsen textbooks, such as Studio [express] B1 , offer free PDF downloads of their model test solutions.