quEstions 17 to 20 ArE BAsED on thE Following tElEphonE ConvErsAtion. you now hAvE 20 sEConDs to rEAD quEstions 17 to 20.

For how long DoEs vErA rEsErvE thE ConFErEnCE roomA．ForApril 3^rD All DAy.
B．ForApril 3^rD AnD 4th.
C．For thrEE DAys.
D．throughout thE stAy oF thE guEsts.