Soluzione del esercizio 8 di Performer B1, Vol. 2

Esercizi svolti per il libro Performer B1, Vol. 2

Soluzione

  1. They have been playing tennis since 2 o'clock.
  2. He's been wasting his money on video games since his birthday.
  3. She's been studying German for six months.
  4. We've been trying to call him for ages.
  5. I've been waiting for the bus since 5 o'clock.
  6. What have you been doing for the last hour?