Soluzione del esercizio 9 di Performer B1 Phases, Vol. 1

Esercizi svolti per il libro Performer B1 Phases, Vol. 1

Soluzione

  1. don't have to
  2. mustn't
  3. don't have to/; needn't
  4. don't have to/; needn't
  5. mustn't
  6. mustn't
  7. needn't/; doesn't have to
  8. mustn't
  9. mustn't