A: Absolutely. The book is color-coded: Green for A1, Orange for A2, Red for B1. You can ignore the B1 chapters and only download/play the A1 tracks.
However, the book has a secret weapon: the audio tracks. Without them, you are missing half the benefit. grammatik aktiv a1-b1 audio download
A: If you own the physical book (new), access is generally free via the app or website. If you bought the book used, you might not have a code, but the basic listening comprehension tracks are often open-access on the Cornelsen site. A: Absolutely
: The book takes you from A1 (basic phrases and gender) through A2 and into B1 (independent usage and more complex sentence structures). Speaking Focus Orange for A2