第一部分 阅读理解(共两节，满分40分)
第一节(共15小题；每小题2分，满分30分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A(导学号59430111)
Social media is one of the fastest－growing industries in today's world.A study conducted by the US Pew Research Centre showed that 92 percent of teenagers go online daily.The wide spread of social media has changed nearly all parts of teenagers' lives.
