Because of the heavy traffic，it was already time for lunch break ________ she got to her office.(2010·四川)

Many workers were organized to clear away_______ remained of the World Trade  Center.

At the beginning of a speech, it is very important to grab the audience's attention and make them interested in ____ you have to say．

______the Internet is of great help, I don’t think it’s a food idea to spend too much time on it. 

My sister was angry ______ what he said.