quEstions 19 to 22 ArE BAsED on thE ConvErsAtion you hAvE just hEArD、

A．it FoCusEs AutomAtiCAlly.
B．it hAs A lot oF spECiAlizED lEnsEs.
C．it is EAsy to loAD、
D．it ADvAnCEs thE Film AutomAtiCAlly.