The final 20 pages of the PDF contain a and a list of redewendungen (useful phrases) for argumentation. If you only have 10 minutes a day, study the appendix of the Erkundungen B2 Kompakt pdf.
Erkundungen B2 Kompakt is an intensive, single-volume, integrated course and workbook designed for fast-track adult German learners Erkundungen B2 Kompakt.pdf
If you want, I can: