In this institution, a medal, together with a prize of a certain sum of money, ________ does best in science and technology every two years.
If you want a friend, you’ll find _____ in me.
His income is double _____ it was five years ago.
_____ of you comes first will get the ticket.
He just does ______ he pleases and never thinks about anyone else.
_____ worries me is _____ we’re going to pay for all this.