You can find comprehensive answer keys and exercise breakdowns on dedicated platforms such as OnlineGDZ . Below are specific links for the various levels of the series:
The search for GDZ (ready-made homework) for the English textbook series (published by Pearson/Longman) provides resources for various proficiency levels, from Beginner to Upper-Intermediate. These materials typically include answers for both the Student's Book and the Language Powerbook (Workbook). Online GDZ Resources by Level gdz po uchebniku anglazkogo iazyka opportunities