1.听见历史上重大事件的消息heard the news of important events in history
2.在美国 in America
3.最重要的事件之一 one of the most important events
4.在美国现代史中in modern American history
5.谁杀了他 who murdered him
6.甚至最日常的活动 everyday activies
7.在操场上 in the playground
8.当铃铛响时the bell rang
9.叫某人做某事 ask sb to do sth
10.告诉这个消息 hear the news
11.十分钟前 10 minutes ago
12.学校停课 School closed
13.在那天 on that day
14.一起回家 walk home together
15.默默地 in silence
16.世贸中心 the World Trade
17.发生 take place
18.在很多美国人出生前before many Americans were born
19.大多数美国人most Americans
20.在更近的时代in more recent times
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