Soluzione del esercizio 7 di Identity B1+
Esercizi svolti per il libro Identity B1+ con autore Elizabeth Sharman
Domanda
Complete the mini-dialogues using the Present perfect continuous and for or since.
Soluzione
- have you been using; 've been using; for
- has Sara been studying; 's been studying; since
- have you been waiting; 've been waiting; since
- has Jack been working; 's been working; since