---The light in the room is still on. Do you know_______?---In order to prepare for the coming exam.
—The party is a great success. We've had a good time.—______!
3D printers are still _____ expensive for most of us ______ afford.
The songs of the rock band sound ________.
Everyone passed the exam ________him. So he was sad.
I find ________ difficult to remember everything, though I’m still young.