-Must I finish all the homework this evening?-No, you __________. Tomorrow is Saturday, and you have enough time for it.
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.