Soluzione del esercizio 21 di Engage!, Vol. 1

Esercizi svolti per il libro Engage!, Vol. 1

Soluzione

  1. Do I have to wear a helmet?
  2. I must study hard for my exam.
  3. You mustn't smoke here.
  4. You don't have to come to the match.
  5. Players have to wear protection.
  6. You mustn't use mobile phones during the exam.