—Could I use your computer for a few minutes, please? — ________. I’m not using it myself.
The students _______ busily when Miss Brown went to get a book she _______ in the office.
I think you must be mistaken about seeing him at the theatre; I’m sure he ____abroad all week.
They haven’t arrived yet but we _____ them at any moment.
I feel sure I _____ her before somewhere.
You’ll never guess who I met today — my old teacher! We _____ for 20 years.