1. The child enjoyed _____ up the wooden bricks then knocking them down.
A. adding          B. pushing        C. piling          D. forming
2. John was very upset because he was _____ by the police with breaking the law.
A. accused         B. arrested       C. sentenced       D. charged   
3. It isn't quite _____ that he will be present at the meeting.
A. sure            B. right          C. exact           D. certain