According to the police, _______ some facts undiscovered.
–Good morning. I’ve got an appointment with Miss Smith in the Personnel Department. –Ah, good morning. You _____ be Mrs. Peters.
We _____ on this project for four hours. Let’s have a rest.
Would it be ______ for you to pick me up at four o’clock and take me to the airport?
I would rather you did some reading while you are free, but you ______.
I don’t think ___ possible to travel around the world without any modern equipment.