—When will his party begin?—I am not sure. It _ be at 8:00 p.m.
Did the police catch the thief___________?
He doesn’t do his homework___________, though he has ___________.
—_________ was light bulb invented ________ ? —Thomas Edison.
Some students enjoy raising pet dogs while__ don't agree with them.
The twins have tried, but__ of them has got the chance to study abroad.