31. Conjugue les verbes au prétérit simple ou au prétérit en be + BV -ing. a. John ... (call) while I ... (sleep). b. When Dad... (come back) we ... (have) dinner. c. What ... (you/do) when they ... (arrive)? d. She ... (write) a long letter while she ... (wait) for him. Voila svp vous pouvez m'aider