The key answer of exercise 7
The key to exercise solutions in chapter 3.2 for the textbook Identity B1+ with authors Elizabeth Sharman from Oxford University Press
Question
Complete the mini-dialogues using the Present perfect continuous and for or since.
Answer
- 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