The textbook Communication progressive du français – Niveau avancé (B2/C1) Claire Miquel
Correct your work strictly. If your answer differs from the key, research why . Is your answer completely wrong, or is it just a different stylistic choice?
Many exercises are open-ended; the corrigés often provide a "suggested response" that serves as a high-level model for your own writing and speaking. Strategies for Using These Resources Effectively