Barack Obama, who came into _________ power on January 20, 2009, was awarded _________2009 Nobel Peace Prize.
My uncle has a lot of books, _______ are about computer science and technology.
He, along with his brothers, ______ how serious the situation is.
This is the factory ________ we visited last Monday.
______ you have finished your work, you ought to have a good rest.
All of her time was devoted to_______ her homework, so she had no time to have fun.