If you are self-studying, buy the Lehrerhandbuch . If you are in a course, ask your teacher to share the specific Lösungen PDF for the chapters you just completed.
Unlike many other language books, the Aspekte B2 official solutions are a free PDF download. They are locked within a separate, copyrighted teacher’s manual or an online password-protected area. lehrbuch aspekte b2 losungen
Here is the of the Lehrbuch Aspekte B2 Lösungen (answer key for the textbook). If you are self-studying, buy the Lehrerhandbuch