The key to exercise solutions in chapter Workbook - You live and learn for the textbook Performer B1 Phases, Vol. 1 with authors M. Spiazzi, M. Tavella, M. Layton, E. Fiordiliso from Zanichelli
Question
Complete the sentences with mustn't, don't / doesn't have to, don't / doesn't need to and the adverbs in brackets.