section D 注意每个空不能超过3个单词，每个单词之间空一格，注意是否首字母需要大写 .    1.What is the purpose of the video library?
To help people improve their ______ abilities. .    2.What problem may people have when using the library for the first time? They may have difficulty understanding ______. .    3.What are people advised to do when listening to the video? Write down the ______ they hear and understand. .    4.What should people do in listening to each conversation? Try to notice the ______. .    5.How can people start watching their first video?
All they need to do is to click on the link of ______. A. B. C. D. E.