Soluzione del esercizio 10 di Performer B1, Vol. 1

Esercizi svolti per il libro Performer B1, Vol. 1

Capitolo

Esercizio

Soluzione

Yesterday at this time, I ~~surfed~~ was surfing a trendy fashion website.
Levi Strauss ~~sold~~ was selling his goods in California when the miners ~~were asking~~ asked him for durable work trousers.
While they ~~studied~~ were studying yesterday, they ~~were forgetting~~ forgot to phone their mother.
When Tony ~~took~~ was taking a photo of me, I ~~talked~~ was talking on my mobile.
We ~~watched~~ were watching the match when the TV ~~was breaking~~ broke down.