I ____ (sit) in class right now.

I____ (sit) here since one o’clock.

Kate is standing at the corner. She _____ (wait) for the bus.

She ____ (wait) for a bus for twenty minutes.

Right now we’re in class, we ____ (do) this exercise for a couple of minutes.

Look, Scott and Rebecca ___ (talk).

You look busy right now. What (you, do)?

I started planning this experiment last January. I ____ (work) on it since then.