WhenIwasa的精选

问题详情：请阅读下面短文,从每小题所给的A、B、C三个选项中,选出一个最佳选项,并在答题卡上将项涂黑。WhenIwasauniversityteacher,Itoldmystudentsthatitwouldbewisetokeeptheirsmartphonesintheirbackpacks.Theywere...