This series by Afanasyeva and Evans is standard in many schools. GDZ for the Spotlight 11 workbook provide detailed answers for grammar-heavy modules.
Advanced learners often turn to specialized English grammar books like English Grammar in Use by Raymond Murphy or Grammarway for more targeted practice on complex rules. How to Use GDZ Effectively gdz 11 klassa po grammatike anglijskogo jazyka
Another popular series by Afanasyeva and Mikheeva that includes comprehensive grammar exercises and corresponding answer keys. This series by Afanasyeva and Evans is standard
While it's tempting to simply copy answers, using GDZ as a learning aid is much more beneficial: ГДЗ для 1-11 классов – Apps on Google Play ГДЗ для 1-11 классов – Apps on Google Play. Google Play ГДЗ для 1-11 классов - Apps on Google Play gdz 11 klassa po grammatike anglijskogo jazyka