1．重点单词：passage，pupil，completely，silence，recently，terrorist，date，tower，realize
2．重点短语：in history，in silence，take down，at first，look out the window
3．重点句式：
People often remember what they were doing when they heard the news of important events in history.
My parents were completely shocked!
Even the date—September 11，2001—has meaning to most Americans.
She remembers working in her office near the two towers.
I didn't believe him at first，but then I looked out the window and realized that it was true.
I was so scared that I could hardly think clearly after that.
