The answers and test materials for the are typically hosted on the official Olimpus archive (olimpus.edu.ru).
For difficult questions, look for walkthroughs on InternetUrok or YouTube to understand the logic behind the "correct" choice. olimpus 2017 osenniaia sessiia 9 klass po biologii otvety
Sites like Olimpiada.ru often host mirrors of major school competition files. The answers and test materials for the are