There were two boys in the lab, did the experiment successfully.
— Could I use your computer for a few moments, please?—__________. I’m not using it myself.
—Have you been wasting time on computer games again?—__________. I’ve been studying a lot and I need a break.
—I’m sorry to have kept you waiting.—__________, Bill.
—We have booked a room for today and tomorrow.—__________, sir.
—Can you read the sign, sir? No smoking allowed in the lift!—__________.