1．What are called primary sources?

　　2．What are called secondary sources?

　　3．Why is it important to separate primary and secondary sources?

　　【答案】　1.The writings of the people who experienced or saw the events then.　2.The writings of the people who write about the events at a much later date.　3.Because it can help us to decide what is true.

Section Ⅰ　Warm­up &World News -Preparing

　　根据提示写出下列单词

　　1． n． 闲谈，聊天

　　2． adj. 当前的，现在的

　　3． n. 事情，事件

　　4． adj. 政治的

　　5． adj. 广泛的

　　6． n. 贫穷，贫困

　　7． n. 电

　　8． n. 改革，改良

　　9． vt. 要求，请求

　　10． n. 债务，欠款

　　11． n. 主办(国/城市/机构)；主人

vt. 主办

　　12． vt. 宣布，宣告

13． n. 委员会