托福听力十三原则之开头原则

第二部分：听力讲座四种开头方式

1)课堂回顾

TPO1-L3

OK, we've been talking about early agriculture in the near east. So let's concentrate on one site and see what we can learn from it.

OK. In the last class, we started talking about useful plant fibers...Today well continue talking about useful fibers, and we'll begin with a fiber that's commonly known as "Manila hemp."

大家可以注意到加粗部分的内容，是针对课程或者课堂内容的回顾。课堂回顾是我们听重点的一个提示而已，我们要关注的是后边的内容，也就是“本堂课”要注意的内容。

课堂回顾式常见关键点：

时态：一般过上时或者是现在完成时、现在完成进行时

关键词：in the last class, today, now, talk about, but.

2)直入主题式

TPO 18-L1

OK, today we are going to start a study of sunspot today

Ok, now I want to talk about an animal that has a fascinating set of defense mechanisms.

直入主题的开头方式，需要考生集中精力听讲座的内容，不要错过听力的有效信息。