Advanced grammar isn't learned overnight. Consistent practice, even for 15 minutes a day, beats a 3-hour "cram session" before a test. Conclusion
Use the GDZ's "Ready Essays" as templates. See how they structure arguments and then try to rewrite them using your own opinions. Moving Beyond the Textbook gdz po in iaz kuzovlev 10 klass
Mastering English in Grade 10: How to Use the Kuzovlev GDZ Wisely Advanced grammar isn't learned overnight
As noted by Accelerate Learning , learning vocabulary within a context is far more effective than memorizing lists. even for 15 minutes a day