_____ computers are convenient to us in daily life, it may also cause other problems.
Please tell me the way you thought of ______ the garden.
Passengers are required to _____ seated until the plane comes to a complete stop.
I know there is a coin in your left hand, but what’s in your _______ hand?
--- Will you go to the exhibition with me? --- If you don’t, ____________.
--- Why can’t I smoke? --- At no time ____ in the meeting room.