How ________ they learn anything when they spend all their spare time watching television?
I was reading attentively in my own room ________ suddenly he knocked at the door.
He has five___________ , and they are all doctors working in the same hospital .
I’ll go to fight in the battle __________ you go or not .
There are countless ________ leaves as if they were a red blanket_______ the ground.
he has been working so hard . __________ he could answer such a difficult question.