They found difficult to finish the work in such a short time.
---It’s so hot here. Do you mind ____________ the window?---____________. I will do it right now.
He can’t state clearly how long he has ___________ the bicycle?
This house is __________ for a family of five ___________.
---Why not stop __________ a rest?--- Oh, it’s so exciting that I can’t stop ____________ the model plane.
Don’t leave the tap ________ after washing hands.