来自鲍贤捷的问题
(2011·北京东城综合练习)Bythetimeyouhavecompletedtheessentialtraining，you________exposedtovirtuallyeverynewfeatureofthecourse.A．willhavebeenB．areC
(2011·北京东城综合练习)Bythetimeyouhavecompletedtheessentialtraining，you________exposedtovirtuallyeverynewfeatureofthecourse.
A．willhavebeen B．are
C．havebeen D．willbe
