Anyone cares for a short grammar test (10 minutes)?

https://www.examenglish.com/leveltest/grammar_level_test.htm

I guarantee that it is not easy.

Here is my result.

Congratulations! Your level is C2 (advanced/mastery)

This is approximately equivalent to CPE, an IELTS band score of 9 or 120 at TOEFL iBT
Time taken: 6 minutes, 0 seconds