阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。16．（15分）ㅤI've been motivated﹣﹣and demotivated﹣﹣by other folks' achievement s all my life. ㅤWhen I was a teenager，a neighborhood friend（3） for a"super，"referring to a 52.4﹣mile double marathon.Then，the next day I went on my longest run﹣﹣15 miles.To be honest，I
