Your best chance for verified answers is to locate the Teacher's Book (Книга для учителя) for your specific grade. These books contain the full keys to exercises, transcripts for listening tasks, and tests. General English Support for Senior Classes
Here is a report on available resources for these textbooks: Available Digital Resources gdz khrustaleva, bogoroditskaia klass
If you are struggling with specific assignments in the 10th or 11th-grade curriculum, these platforms offer general topic explanations and grammar help: Your best chance for verified answers is to
Provides theory, tests, and tasks for 11th-grade topics like "Political Issues," "Technologies," and "Global Issues". You can find digital versions (PDF/DJVU) of the
You can find digital versions (PDF/DJVU) of the textbooks for grades V through XI on educational communities like VK (УМК Хрусталёвой и Богородицкой) . These are useful for reviewing the material but do not contain an answer key.
There are no major, dedicated GDZ portals that provide step-by-step answers specifically for the Khrustaleva/Bogoroditskaya series for grades 9, 10, or 11. Most popular sites like Gdz.ru and Skysmart prioritize standard state curriculum textbooks.
Offers general workbooks and collectors for 11th-grade English that might overlap with your curriculum.