基本信息
21．Jack is no longer the lazy boy _______ he used to be.
A．who B．what C．which D．that
22．Is Daniel the person _________ you want to make friends with, Jack?
A．with who B．with whom C．who D．with that
23．Don’t quarrel with your friend, ________will damage your friendship.
A．who B．which C．that D．what
