来自顾均晓的问题
Bythetimeyouhavecompletedtheessentialtraining,you_____exposedtovirtuallyeverynewfeatureofthecourse.A.areB.willhavebeenC.havebeenD.willbe
Bythetimeyouhavecompletedtheessentialtraining,you_____exposedtovirtuallyeverynewfeatureofthecourse.A.areB.willhavebeenC.havebeenD.willbe

