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（10） ：The roads there went through large valleys where I'd be riding uphill for miles at a time.I'd never faced such
