At the sight of the policeman,_______ from behind the door.
My father told me that he ________ me some gifts when he returned from America the next week.
The cake is delicious. May I have ________ one?
John seems puzzled about ________ the question meant.
All his free time is ______ by volunteer work, but he feels it meaningful.
The athletes competed ________ each other for gold medals in the Olympic Games.