{{B}}quEstions 27-30{{/B}}

A、A、CollEgE CoursE in whiCh nEw iDEAs AnD suBjECts ArE introDuCED、
B、A、univErsity ClAss in whiCh topiCs ArE DisCussED Among thE stuDEnts.
C、A、systEm whErE univErsity stuDEnts ArE AllowED to ChoosE thEir tEAChErs.
D、A、gAthEring whErE only tEAChErs AnD stuDEnts oF ABout thE sAmE AgE CAn AttEnD、