{{B}}quEstions 19 to 21 ArE BAsED on thE ConvErsAtion you hAvE just hEArD、{{/B}}

A、suBsCription to A Book.
B．A、BArgAin on DAnCE lEssons.
C．A、ChEAp AirFArE to hAwAii.
D．A、mEmBErship to sports CluB、