I’m not allowed to go out on school nights. — .

You don’t look . Are you ill ? – No , I’m just a bit tired .

Though he is _____ ugly boy, yet he often comes _____ first in the exams.

Is air the lightest thing in the world?– Not . Scientists from Zhejiang University have just developed the world’s lightest material.

I won’t go to the concert because I _______ my ticket.