Knowing the author (e.g., Biboletova, Afanasyeva, or Kuzovlev) will help pinpoint the exact answers you need.
Another standard textbook for general education. Solutions for older editions are frequently hosted on sites like Gdz.ru .
Sites like Yaklass provide specific exercises and theory if you need to understand the logic behind the answers.
ГДЗ по английскому языку за 7 класс