[al:新概念英语（第1册）第131课（听力强化·美英）]
[ti:Don't be so Sure!－别那么肯定！
[ar:© 2011 露珠英语工作室]
[by:http://weibo.com/DewEnglishStudio]
[00:00.00]We have this problem every year.－我们每年都碰到这类问题。