Soluzione del esercizio 7 di Step Up Gold 3

Esercizi svolti per il libro Step Up Gold 3

Soluzione

  1. You must show your passport at the airport.
  2. You mustn't run next to the swimming pool.
  3. In many countries, you must wear a helmet when you ride a bicycle.
  4. You must buy a ticket before you get on the train.
  5. You mustn't use your mobile phone when you're driving.
  6. You mustn't talk to the driver when the bus is moving.