Questions 19 to 21 arc based on the conversation you have just heard.

A．It reflects commercial interests~
B．It is a fashionable professional event.
C．It is an essential affair for international cinema.
D．It is more concerned with the art of film than with financial interests.

A．It is needed to adjust the temperature of our bodies.
B．It is our second need.
C．We need clothing to cover our bodies.
D．Weather is changing all the time.