Tom’s brother who is now a doctor always encourages        hard and go to college. 

Limited life should be made good use _______ our own dreams rather than be a follower or do what we are told to.

He wondered if he could slip out of the lecture hall without anyone______.

The opening ceremony of Beijing 2008 Olympics is a great success, which is believed  ________ the Chinese splendid civilization.

There goes the bell for the class.Let’s stop___.