cet4听力题,cet4听力原文

cet4听力题，cet4听力原文。

2018年12月大学英语四级听力考试题及答案

Questions 26 to 28 are based on the passage you have just heard，2 What is the passage mainly about？正确答案，C 解析，主旨题，关键是要听到首尾句及核心词。

Overall，53 percent of Americans ages 16 and older......