The child enjoyed _____ up the wooden bricks then knocking them down.
— I hear you have written a novel? — Yes, the book ____ come out in a month or so.
You must apologize ______ your mother ______ your rudeness.
Her father retired _______ poor health last year.
— Did you enjoy yourself at the dinner party? — Yes, I’ve never been to________one before.
Many important leaders of different countries______ in the opening ceremony of the 29th Olympics held on August 8,2008.