____ they ____ a cow yesterday?

What is mum cooking in the kitchen?—Fish, I guess. How nice it _____!

Can you please tell me something about life in the future?—Oh, maybe in the future, people will _______ by robots.

Are you ________ the dark? –Oh, yes. I always go to sleep with the light on.

Progress ____so far very good and we are sure that the work will be finished on time.