: Soft signs after sibilants, vowels after "Ц", and alternating roots (а/о, е/и).
Do you have the (e.g., Razumovskaya or Kupalova) or a specific exercise number you need help with? gdz po russkomu jazyku klass drofa 11-izd, 2007 god
: This site remains one of the largest databases for older Russian textbooks. You can browse their Russian Language 5th Grade Section to find the specific author that matches your Drofa 2007 book. : Soft signs after sibilants, vowels after "Ц",
Все виды разбора по русскому языку. 5-9 классы: Ольга Ушакова : Soft signs after sibilants