_______ that all the doors and windows are locked before you leave the house!
—I haven't seen Tom for a long time. Is he ill? —_____. His teacher told me he was in hospital.
Excuse me, could you tell me ________?
At the foot of the hill, you could hear nothing but the _____of the running water.
—Who is the girl standing over there? —Well, if you _____ know, her name is Kate.
—Tom, ______ your books on the floor. I want to mop it. —OK, mum. I’m coming.