Using a GDZ for Golitsynsky is common, but there’s a right way and a wrong way to do it.
If you've ever studied English in a post-Soviet country, you've likely encountered the "green bible" of English grammar—. Whether you are a high schooler prepping for exams or an adult brushing up on the basics, this sbornik (collection) is a staple for a reason.
Complete an exercise first, then use the GDZ/Answer Key to check your work.