FrenchClub hosts a downloadable PDF of the 2008 edition's keys.
Other VK posts, like those from Poliglot , share the full "Manuel de Français" along with keys. : FrenchClub hosts a downloadable PDF of the 2008
Communities on often share PDF files containing keys. For example, the Linguists ISGZ community provides answers starting from Lesson 8, with earlier answers available on linked blogs. like those from Poliglot